MAX-8
u-blox 8 GNSS modules
Data Sheet
Abstract
Technical data sheet describing the MAX-8 module series, which provides
single GNSS reception
(GPS, GLONASS) in a 9.7 x 10.1 mm package. It is pin-compatible to MAX-7 modules.
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Document Information
Title MAX-8
Subtitle u-blox 8 GNSS modules
Document type Data Sheet
Document number UBX-16000093
Revision and date R05 2-Apr-2019
Document status Production Information
Product status Corresponding content status
In Development /
Prototype
Objective Specification Target values. Revised and supplementary data will be published later.
Engineering Sample Advance Information Data based on early testing. Revised and supplementary data will be published later.
Initial Production Early Production Information Data from product verification. Revised and supplementary data may be published later.
Mass Production /
End of Life
Production Information Document contains the final product specification.
This document applies to the following products:
Product name Type number Firmware version PCN reference
MAX-8C MAX-8C-0-10 ROM SPG 3.01 N/A
MAX-8Q MAX-8Q-0-10 ROM SPG 3.01 N/A
u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this
document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only
permitted with the
express written permission of u-blox.
The information contained herein is provided “as is” and u
-blox assumes no liability for its use. No warranty, either express or
implied, is given, including but not limited
to, with respect to the accuracy, correctness, reliability and fitness for a particular
purpose of the information. This document may be revised by u
-blox at any time without notice. For the most recent
documents, visit www.u
-blox.com.
Copyright © u
-blox AG.
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Contents
Document Information ................................................................................................................................ 2
Contents .......................................................................................................................................................... 3
1 Description ............................................................................................................................................... 5
1.1 Overview ........................................................................................................................................................ 5
1.2 Product features ......................................................................................................................................... 5
1.3 GNSS performance ..................................................................................................................................... 6
1.4 Block diagram .............................................................................................................................................. 7
1.5 Supported GNSS constellations .............................................................................................................. 7
1.5.1 GPS ........................................................................................................................................................ 7
1.5.2 GLONASS ............................................................................................................................................. 7
1.6 Assisted GNSS (A-GNSS) .......................................................................................................................... 7
1.6.1 AssistNowTM Online ......................................................................................................................... 8
1.6.2 AssistNowTM Offline ........................................................................................................................... 8
1.6.3 AssistNowTM Autonomous ............................................................................................................... 8
1.7 Augmentation systems ............................................................................................................................. 8
1.7.1 Satellite-Based Augmentation System (SBAS) ........................................................................... 8
1.7.2 QZSS ..................................................................................................................................................... 8
1.7.3 Differential GPS (D-GPS) ................................................................................................................... 9
1.8 Odometer ...................................................................................................................................................... 9
1.9 Broadcast navigation data and satellite signal measurements ....................................................... 9
1.10 Geofencing .................................................................................................................................................... 9
1.11 Message Integrity Protection ................................................................................................................... 9
1.12 Spoofing detection ................................................................................................................................... 10
1.13 EXTINT: External interrupt ...................................................................................................................... 10
1.13.1 Pin control .......................................................................................................................................... 10
1.13.2 Aiding .................................................................................................................................................. 10
1.14 TIMEPULSE ................................................................................................................................................ 10
1.15 Protocols and interfaces ......................................................................................................................... 11
1.16 Interfaces .................................................................................................................................................... 11
1.16.1 UART ................................................................................................................................................... 11
1.16.2 Display Data Channel (DDC) ........................................................................................................... 11
1.17 Clock generation ........................................................................................................................................ 11
1.17.1 Oscillators .......................................................................................................................................... 11
1.17.2 Real-Time Clock (RTC) ..................................................................................................................... 11
1.18 Power management ................................................................................................................................. 12
1.18.1 DC-DC converter ............................................................................................................................... 12
1.18.2 Power Mode Setup ............................................................................................................................ 12
1.18.3 Continuous Mode .............................................................................................................................. 12
1.18.4 Power Save Mode .............................................................................................................................. 12
1.19 Antenna ....................................................................................................................................................... 13
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1.19.1 Active antenna control (LNA_EN) ................................................................................................. 13
1.20 Configuration management ................................................................................................................... 13
2 Pin definition ........................................................................................................................................ 14
2.1 Pin assignment .......................................................................................................................................... 14
3 Electrical specification ..................................................................................................................... 15
3.1 Absolute maximum rating ....................................................................................................................... 15
3.2 Operating conditions ................................................................................................................................ 16
3.3 Indicative current requirements ............................................................................................................ 17
4 Mechanical specifications ............................................................................................................... 18
5 Reliability tests and approvals ....................................................................................................... 19
5.1 Reliability tests .......................................................................................................................................... 19
5.2 Approvals .................................................................................................................................................... 19
6 Product handling & soldering .......................................................................................................... 20
6.1 Packaging ................................................................................................................................................... 20
6.1.1 Reels .................................................................................................................................................... 20
6.1.2 Tapes ................................................................................................................................................... 20
6.2 Shipment, storage and handling ........................................................................................................... 21
6.2.1 Moisture Sensitivity Levels ............................................................................................................ 21
6.2.2 Reflow soldering ................................................................................................................................ 21
6.2.3 ESD handling precautions .............................................................................................................. 21
7 Default messages ............................................................................................................................... 23
8 Labeling and ordering information ............................................................................................... 24
8.1 Product labeling ......................................................................................................................................... 24
8.2 Explanation of codes ................................................................................................................................ 24
8.3 Ordering codes ........................................................................................................................................... 24
Appendix ....................................................................................................................................................... 25
A Glossary ................................................................................................................................................. 25
Related documents ................................................................................................................................... 26
Revision history .......................................................................................................................................... 26
Contact .......................................................................................................................................................... 27
(”Ink 000m 20 321L013 ua
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1 Description
1.1 Overview
The MAX-8 series of standard precision GNSS modules features the reliable performance of the u-blox
8 positioning engine, which receives GPS, GLONASS, QZSS and SBAS signals. The MAX-8 series
delivers high sensitivity and minimal acquisition times in the ultra-compact MAX form factor.
The economical MAX-8 series provides high sensitivity while featuring low power consumption and
supporting advanced Power Save Modes. It also provides message integrity protection, geofencing,
spoofing detection, and odometer functionalities.
The MAX-8C is optimized for cost sensitive applications with lowest power, while the MAX-8Q
provides best performance. The industry proven MAX form factor allows easy migration from MAX-7
and MAX-6 modules by offering backward compatibility. Sophisticated RF-architecture and
interference suppression ensure maximum performance even in GNSS-hostile environments.
The MAX-8 series combines a high level of integration capability with flexible connectivity options in
a miniature package. This makes it perfectly suited for industrial and mass-market end products with
strict size and cost requirements. The DDC (I2C compliant) interface provides connectivity and
enables synergies with most u-blox cellular modules.
The u-blox 8 modules use GNSS chips qualified according to AEC-Q100 and are manufactured in
ISO/TS 16949 certified sites. Qualification tests are performed as stipulated in the ISO16750
standard: “Road vehicles Environmental conditions and testing for electrical and electronic
equipment”. MAX-8Q complies with green/halogen free standards.
The u-blox MAX-8 modules can also benefit from the u-blox AssistNow assistance service. The Online
service provides GNSS broadcast parameters, such as ephemeris, almanac data, and time, to reduce
the receiver’s time to first fix significantly and improve acquisition sensitivity. The extended validity
of AssistNow Offline data (up to 35 days) and AssistNow Autonomous data (up to 3 days) provide
faster acquisition after a long off time.
See section 1.6 for more information concerning AssistNow Assistance with the MAX-8 series.
1.2 Product features
Model Category GNSS Supply Interfaces Features Grade
Standard Precision GNSS
High Precision GNSS
Timing
GPS / QZSS
GLONASS
Galileo
BeiDou
Number of concurrent
GNSS
1.65
V 3.6 V
2.7 V
3.6 V
UART
USB
SPI
DDC (I
2
C compliant)
Programmable (flash)
Data logging
Additional SAW
Additional LNA
RTC crystal
Oscillator
Built
-
in antenna
Built
-
in antenna supply and
supervisor
Timepulse
Standard
Professional
Automotive
MAX-8C 1 C 1
MAX-8Q 1 T 1
= Yes, but with a higher backup current
C = Crystal / T = TCXO
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1.3 GNSS performance
Parameter Specification
Receiver type 72-channel u-blox 8 engine
GPS L1C/A, SBAS L1C/A, QZSS L1C/A, GLONASS L1OF
Accuracy of time pulse RMS
99%
30 ns
60 ns
Frequency of time pulse 0.25 Hz…10 MHz (configurable)
Operational limits 1 Dynamics 4 g
Altitude 50,000 m
Velocity 500 m/s
Velocity accuracy 2 0.05 m/s
Heading accuracy 2 0.3 degrees
GNSS GPS GLONASS
Horizontal position accuracy 3 Autonomous
SBAS
2.5 m
2.0 m
4.0 m
Max navigation update rate 4 18 Hz 18 Hz
MAX-8Q
Time-To-First-Fix 5
Cold start
29 s
30 s
Hot start 1 s 1 s
Aided starts 6 2 s 2 s
Sensitivity 7 Tracking & Navigation 166 dBm 166 dBm
Reacquisition 160 dBm 156 dBm
Cold start 148 dBm 145 dBm
Hot start 157 dBm 156 dBm
MAX-8C
Time-To-First-Fix 5
Cold start
30 s
33 s
Hot start 1 s 1 s
Aided starts 6 3 s 3 s
Sensitivity 7 Tracking & Navigation 164 dBm 163 dBm
Reacquisition 159 dBm 156 dBm
Cold start 147 dBm 145 dBm
Hot start 156 dBm 155 dBm
Table 1: MAX-8 performance in different GNSS modes (default: single reception of GPS incl. SBAS and QZSS)
1 Assuming Airborne < 4 g platform
2 50% @ 30 m/s
3 CEP, 50%, 24 hours static, -130 dBm, > 6 SVs
4 Rates with SBAS and QZSS enabled for > 98% fix report rate under typical conditions
5 All satellites at -130 dBm
6 Dependent on aiding data connection speed and latency
7 Demonstrated with a good external LNA
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1.4 Block diagram
Figure 1: MAX-8 block diagram
1.5 Supported GNSS constellations
MAX-8 modules are single GNSS receivers that can receive and track either GPS or GLONASS signals.
By default, the MAX-8 receivers are configured for GPS, including SBAS and QZSS reception.
The augmentation systems: SBAS and QZSS can be enabled only if GPS operation is configured.
1.5.1 GPS
MAX-8 modules are designed to receive and track the L1C/A signals provided at 1575.42 MHz by the
Global Positioning System (GPS). The MAX-8 series can receive and process GPS concurrently with
QZSS and SBAS signals.
1.5.2 GLONASS
MAX-8 modules can receive and process the Russian GLONASS satellite system as an alternative to
the US-based Global Positioning System (GPS). u-blox MAX-8 modules are designed to receive and
track the L1OF signals GLONASS provides at 1602 MHz + k*562.5 kHz, where k is the satellite’s
frequency channel number (k = 7,..., 5, 6). The ability to process GLONASS L1OF satellite signals
allows design of GLONASS receivers where required by regulations.
To take advantage of GPS and GLONASS, dedicated hardware preparation must be made during the
design-in phase. See the MAX-8 / MAX-M8 Hardware Integration Manual [1] for u-blox design
recommendations.
1.6 Assisted GNSS (A-GNSS)
Supply of aiding information, such as ephemeris, almanac, rough last position and time, will reduce
the time to first fix significantly and improve the acquisition sensitivity. All u-blox G8020 based
products support the u-blox AssistNow Online and AssistNow Offline A-GNSS services, support
AssistNow Autonomous, and are OMA SUPL compliant.
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1.6.1 AssistNowTM Online
With AssistNow Online, an internet-connected GNSS device downloads assistance data from u-blox
AssistNow Online Service to the receiver at system start-up. The Multi-GNSS Assistance (MGA)
service is an HTTP protocol based network operator independent service. Supplying assistance
information, such as ephemeris, almanac, a rough last position and time, can reduce the time to first
fix significantly and improve the acquisition sensitivity.
The AssistNow Online service provides data for GPS, GLONASS and QZSS.
1.6.2 AssistNowTM Offline
With AssistNow Offline service, users can download long-term orbit data over the Internet at their
convenience. The orbit data must be stored in the memory of the application processor for
subsequent down-load to the MAX-8 module. Thus the function enables a position fix within seconds,
even when no network is available. AssistNow Offline offers augmentation for up to 35 days.
The AssistNow Offline service provides data for GPS and GLONASS.
1.6.3 AssistNowTM Autonomous
AssistNow Autonomous operation provides aiding information without the need for a host or external
network connection. Based on previous broadcast satellite ephemeris data downloaded to and stored
by the GNSS receiver, AssistNow Autonomous automatically generates accurate predictions of
satellite orbital data (“AssistNow Autonomous data”) that is usable for future GNSS position fixes.
The concept capitalizes on the periodic nature of GNSS satellite orbits by capturing strategic
ephemeris data at specific times of the day. For MAX-8 modules, AssistNow Autonomous can
calculate GPS-only orbit predictions for up to 3 days.
AssistNow Autonomous benefits are:
Faster fix in situations where GNSS satellite signals are weak
No connectivity required
Compatible with AssistNow Online (can work stand-alone, or in tandem with the AssistNow
Online service)
No integration effort; calculations are done in the background, transparent to the user.
For more details on A-GNSS, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification [2].
1.7 Augmentation systems
1.7.1 Satellite-Based Augmentation System (SBAS)
The MAX-8 modules support reception of SBAS broadcast signals. These systems supplement GPS
data with additional regional or wide area GPS augmentation data. The system broadcasts
augmentation data via satellite and this information can be used by GNSS receivers to improve the
resulting precision. SBAS satellites can also be used as additional signals for ranging (navigation),
further enhancing availability. The following SBAS types are supported: WAAS, EGNOS and MSAS.
For more details, see the u-blox 8 / M8 Receiver Description Including Protocol Specification [2].
1.7.2 QZSS
The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system that transmits
additional GPS L1C/A signals for the Pacific region covering Japan and Australia. The MAX-8 modules
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are able to receive and track these signals concurrently with GPS signals, resulting in better
availability especially under challenging signal conditions, e.g. in urban canyons.
The L1-SAIF signal provided by QZSS is not supported
1.7.3 Differential GPS (D-GPS)
u-blox receivers support Differential-GPS data according to RTCM specification 10402.3 [5]: The use
of D-GPS improves GPS position accuracy. The RTCM implementation supports the following
RTCM 2.3 messages:
Message Type Description
1 Differential GPS Corrections
2 Delta Differential GPS Corrections
3 GPS Reference Station Parameters
9 GPS Partial Correction Set
Table 2: Supported RTCM 2.3 messages
RTCM corrections cannot be used together with SBAS.
For more details, see the u-blox 8 / M8 Receiver Description Including Protocol Specification [2].
1.8 Odometer
The odometer provides information on travelled ground distance (in meters) using solely the position
and Doppler-based velocity of the navigation solution. For each computed travelled distance since the
last odometer reset, the odometer estimates a 1-sigma accuracy value. The total cumulative ground
distance is maintained and saved in the BBR memory.
The odometer feature is disabled by default. For more details, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
1.9 Broadcast navigation data and satellite signal
measurements
u-blox 8 receivers can output all the GNSS broadcast data upon reception from tracked satellites. This
includes all the supported GNSS signals plus the augmentation services SBAS and QZSS. The
receiver also makes available the tracked satellite signal information, i.e. raw code phase and Doppler
measurements in a form aligned to the ETSI mobile cellular location services protocol (RRLP) [6]. For
more details, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2].
1.10 Geofencing
The u-blox MAX-8 modules support up to four circular geofencing areas defined on the Earth’s surface
using a 2D model. Geofencing is active when at least one geofence is defined. The current status can
be found by polling the receiver.
1.11 Message Integrity Protection
The MAX-8 modules provide a function to prevent a third party interfering with the UBX message
stream sent from receiver to host. The security mechanism essentially ”signs” the nominated
messages with a following message containing an md5 generated hash of the nominated message.
This message signature is then compared with one generated by the host to determine if the message
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data has been altered. The hash algorithm seed can use one fixed secret ID key set by eFuse in
production or a dynamic ID key set by host enabling users to detect “Man-in-the-middle” style attacks.
1.12 Spoofing detection
Spoofing is a process whereby a malicious third party tries to control the reported position via a “fake”
GNSS broadcast signal. This may result in the form of reporting incorrect position, velocity or time.
To combat this, the MAX-8 modules include anti-spoofing measures to alert the host when signals
appear to be suspicious. The receiver combines a number of checks on the received signals looking for
inconsistencies across several parameters.
This feature does not guarantee detection of all spoofing attacks
1.13 EXTINT: External interrupt
EXTINT is an external interrupt pin with fixed input voltage thresholds with respect to VCC_IO. It can
be used for control of the receiver or for aiding.
For more information on how to implement and configure these features see the u-blox 8 / u-blox M8
Receiver Description Including Protocol Specification [2] and the MAX-8 / MAX-M8 Hardware
Integration Manual [1].
1.13.1 Pin control
The pin control feature allows overriding the automatic active/inactive cycle of Power Save Mode. The
state of the receiver can be controlled through the EXTINT pin.
The receiver can also be turned off and sent into Backup Mode using EXTINT when Power Save Mode
is not active.
1.13.2 Aiding
The EXTINT pin can be used to supply time or frequency aiding data to the receiver.
For time aiding, hardware time synchronization can be achieved by connecting an accurate time pulse
to the EXTINT pin.
Frequency aiding can be implemented by connecting a periodic rectangular signal with a frequency up
to 500 kHz and arbitrary duty cycle (low/high phase duration must not be shorter than 50 ns) to the
EXTINT pin, and providing the applied frequency value to the receiver using UBX messages.
1.14 TIMEPULSE
A configurable time pulse signal is available with all u-blox MAX modules.
The TIMEPULSE output generates pulse trains synchronized with a GNSS or UTC time grid, with
intervals configurable over a wide frequency range. Thus it may be used as a low frequency time
synchronization pulse or as a high frequency reference signal.
By default the time pulse signal is configured to 1 pulse per second. For more information, see the
u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2].
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1.15 Protocols and interfaces
Protocol Type
NMEA 0183, version 4.0 (V2.1, V2.3 or V4.1 configurable) Input/output, ASCII
UBX Input/output, binary, u-blox proprietary
RTCM Input, message 1, 2, 3, 9
Table 3: Available Protocols
All protocols are available on UART and DDC (I2C compliant). For specification of the various protocols,
see the u-blox-8 / u-blox M8 Receiver Description Including Protocol Specification [2].
1.16 Interfaces
A number of interfaces are provided either for data communication or memory access. The embedded
firmware uses these interfaces according to their respective protocol specifications.
1.16.1 UART
MAX-8 modules include one UART interface, which can be used for communication to a host. It
supports configurable baud rates. For supported baud rates, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
Designs must allow access to the UART and the SAFEBOOT_N function pin for future service and
reconfiguration.
1.16.2 Display Data Channel (DDC)
An I2C compliant DDC interface is available for communication with an external host CPU or u-blox
cellular modules. The interface can be operated in slave mode only. The DDC protocol and electrical
interface are fully compatible with the Fast-Mode of the I2C industry standard. Since the maximum
SCL clock frequency is 400 kHz, the maximum transfer rate is 400 kbit/s.
The DDC interface is I2C Fast Mode compliant. For timing parameters, consult the I2C standard.
The maximum bit rate is 400 kbit/s. The interface stretches the clock when slowed down while
serving interrupts, so real bit rates may be slightly lower.
1.17 Clock generation
1.17.1 Oscillators
MAX-8 modules are available in Crystal and TCXO versions. The TCXO option allows accelerated weak
signal acquisition, enabling faster start and reacquisition times.
Oscillators used on MAX-8 modules are carefully selected and screened for stability and against
frequency perturbations across the full operating range (40 °C to +85 °C).
The careful selection and qualification of critical parts, such as GNSS oscillators, has resulted in u-
blox modules being the most reliable positioning modules in the industry, particularly in challenging
conditions.
1.17.2 Real-Time Clock (RTC)
The RTC is driven by a 32 kHz oscillator, which makes use of an RTC crystal. If the main supply voltage
fails and a battery is connected to V_BCKP, parts of the receiver switch off, but the RTC still runs
providing a timing reference for the receiver. This operating mode is called Hardware Backup Mode,
which enables all relevant data to be saved in the backup RAM to allow a hot or warm start later.
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With MAX-8C in Hardware Backup Mode, the main oscillator is used as timing reference instead of
the 32 kHz oscillator. MAX-8C applies single crystal mode, where the 26 MHz crystal oscillator can
also be used to provide a frequency reference to the RTC without using an additional crystal for the
RTC. This makes MAX-8C a more cost efficient solution at the expense of a higher backup current.
For more information, see the MAX-8 / MAX-M8 Hardware Integration Manual [1].
1.18 Power management
u-blox 8 technology offers a power optimized architecture with built-in autonomous power saving
functions to minimize power consumption at any given time. Furthermore, the receiver can be used in
two operating modes: Continuous mode for best performance or Power Save Mode for optimized
power consumption respectively. In addition, a high efficiency DC-DC converter is integrated to allow
low power consumption even for higher main supply voltages.
1.18.1 DC-DC converter
MAX-8Q and MAX-8C modules integrate a DC-DC converter, allowing reduced power consumption by
up to 50%, especially when using a main supply voltage above 2.5 V.
For more information, see the MAX-8 / MAX-M8 Hardware Integration Manual [1].
1.18.2 Power Mode Setup
The u-blox MAX-8 modules can be configured to run in either continuous or a choice of Power Save
Mode configurations. A template of power mode settings can be used to easily select typical power
mode setups to cover the majority of users’ requirements.
For specific power saving applications the user has the option to fully configure via the power save
mode configuration. For more information see section 1.18.4.
The u-blox 8 receivers’ power mode setup offers a choice of continuous operation and preset Power
Save Mode Configurations:
Continuous (default) mode for best GNSS performance
Continuous with no compromise in power consumption
A 1 Hz cyclic tracking mode for aggressive power reduction
Choice of 2 or 4 Hz cyclic tracking modes for typical wearable applications
ON/OFF interval mode
1.18.3 Continuous Mode
Continuous Mode uses the acquisition engine at full performance, resulting in the shortest possible
TTFF and the highest sensitivity. The receiver searches for all possible satellites until the almanac is
completely downloaded. The receiver then switches to the tracking engine to lower the power
consumption.
Thus, a lower tracking current consumption level will be achieved when:
A valid GNSS position is obtained
The entire almanac has been downloaded
The ephemeris for each satellite in view is valid
1.18.4 Power Save Mode
For power sensitive applications, u-blox 8 receivers provide a Power Save Mode for reduced power
consumption.
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Power Save Mode provides two dedicated methods, ON/OFF and Cyclic tracking, that reduce average
current consumption in different ways to match the needs of the specific application. These options
can be set by using a specific UBX message.
For more information about power management strategies, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
1.19 Antenna
MAX-8 modules are designed for use with passive 8 and active9 antennas.
Parameter Specification
Antenna type Passive and active antenna
Active antenna recommendations Minimum gain
Maximum gain
Maximum noise figure
15 dB (to compensate signal loss in RF cable)
50 dB
1.5 dB
Table 4: Antenna Specifications for all MAX-8 modules
1.19.1 Active antenna control (LNA_EN)
The LNA_EN Pin can be used to turn on and off an external LNA or an active antenna. This reduces
power consumption in Power Save Mode (Backup mode). This pin is available on the MAX-8C and MAX-
8Q modules.
1.20 Configuration management
Configuration settings can be modified with UBX configuration messages. The modified settings
remain effective until power-down or reset. If these settings have been stored in battery-backup RAM,
then the modified configuration will be retained, as long as the backup battery supply is not
interrupted.
For more information about configuration management, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
8 For integration MAX-8 modules with Cellular products, see the MAX-8 / MAX-M8 Hardware Integration Manual [1]
9 For information on using active antennas with MAX-8 modules, see the MAX-8 / MAX-M8 Hardware Integration Manual [1].
6ND RESELN RFJN VCC GND vchu LNAiEN MAX-8 VJCKP VCCJ‘F TopView EXTINT Reserved TIMEPULSE SDA mm SCL TXD SAFEHUUTJI GND
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2 Pin definition
2.1 Pin assignment
Figure 2: Pin assignment
No Name PIO 10 No. I/O Description
1 GND - Ground
2 TXD 6 O Serial Port
3 RXD 7 I Serial Port
4 TIMEPULSE 11 O Time pulse (1PPS)
5 EXTINT 13 I External Interrupt Pin
6 V_BCKP - Backup voltage supply
7 VCC_IO - IO Supply Voltage
8 VCC - Supply voltage
9 RESET_N - I RESET_N
10 GND - Ground
11 RF_IN - I GNSS signal input
12 GND - Ground
13 LNA_EN 16 O Antenna / External LNA control
14 VCC_RF - Output Voltage RF section
15 Reserved - - Reserved
16 SDA 9 I/O DDC Data
17 SCL 8 I/O DDC Clock
18 SAFEBOOT_N - I SAFEBOOT_N (for future service and reconfiguration, leave OPEN)
Table 5: Pinout
Pins designated asReservedshould not be used. For more information about pinouts, see the
MAX-8 / MAX-M8 Hardware Integration Manual [1].
10 Peripheral Input Output
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3 Electrical specification
The limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134).
Stress above one or more of the limiting values may cause permanent damage to the device. These
are stress ratings only, and operation of the device at these or at any other conditions above those
given in the Characteristics sections of the specification is not implied. Exposure to these limits
for extended periods may affect device reliability.
Where application information is given, it is advisory only and does not form part of the
specification. For more information, see the MAX-8 / MAX-M8 Hardware Integration Manual [1]
.
3.1 Absolute maximum rating
Parameter Symbol Module Condition Min Max Units
Power supply voltage VCC, VCC_IO All 0.5 3.6 V
Backup battery voltage V_BCKP All 0.5 3.6 V
Input pin voltage Vin All 0.5 VCC_IO+0.
5
V
DC current trough any digital I/O pin
(except supplies)
Ipin 10 mA
VCC_RF output current ICC_RF All 100 mA
Input power at RF_IN Prfin All source impedance =
50 , continuous wave
15 dBm
Antenna bias voltage V_ANT 6 V
Antenna bias current I_ANT 100 mA
Storage temperature Tstg
MAX-
8C
MAX-
8Q
40
40
105
85
°C
°C
Table 6: Absolute maximum ratings
Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage.
These are stress ratings only. The product is not protected against overvoltage or reversed
voltages. If necessary, voltage spikes exceeding the power supply voltage specification, given in
table above, must be limited to values within the specified boundaries by using appropriate
protection diodes.
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3.2 Operating conditions
All specifications are at an ambient temperature of +25 °C. Extreme operating temperatures can
significantly impact specification values. Applications operating near the temperature limits
should be tested to ensure the specification.
Parameter Symbol Module Min Typ Max Units Condition
Power supply voltage VCC, VCC_IO MAX-8C 1.65 3.0 3.6 V
MAX-8Q 2.7 3.0 3.6 V
Backup battery voltage V_BCKP All 1.4 3.6 V
Backup battery current I_BCKP MAX-8Q 15 µA V_BCKP = 3.0 V,
VCC = 0 V
MAX-8C 100 µA V_BCKP = 3.0 V,
VCC = 0 V
SW backup current I_SWBCKP MAX-8Q 20 µA VCC = 3.0 V
MAX-8C 105 µA VCC = 3.0 V
Input pin voltage range Vin All 0 VCC_IO V
Digital IO Pin Low level input
voltage
Vil All 0 0.2*VCC_IO V
Digital IO Pin High level input
voltage
Vih All 0.7*VCC_IO VCC_IO+0.5 V
Digital IO Pin Low level output
voltage
Vol All 0.4 V Iol=4 mA
Digital IO Pin High level output
voltage
Voh All VCC_IO - 0.4 V Ioh=4 mA
Pull-up resistor for RESET_N
(Internal)
Rpu All 11 k
V_ANT antenna bias voltage V_ANT 2.7 5.5 V IANT < 50 mA
Antenna bias voltage drop V_ANT_DROP 0.1 V ICC_RF =50 mA
VCC_RF voltage VCC_RF All VCC - 0.1 V
VCC_RF output current ICC_RF All 50 mA
Receiver Chain Noise Figure 11 NFtot All 3.5 dB
Operating temperature Topr All 40 85 °C
Table 7: Operating conditions
Operation beyond the specified operating conditions can affect device reliability.
11 Only valid for the GPS band
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3.3 Indicative current requirements
Table 8 lists examples of the total system supply current for a possible application.
Values in Table 8 are provided for customer information only as an example of typical power
requirements. Values are characterized on samples. Actual power requirements can vary
depending on FW version used, external circuitry, the number of SVs tracked, signal strength, type
of start as well as time, duration and conditions of test.
Parameter Symbol Module Typ
GPS/QZSS/SBAS
Typ
GLONASS
Max Units Condition
Max. supply current 12 Iccp All 67 mA Estimated at 3 V
Average supply current 13, 14 Icc Acquisition15 MAX-8C 18 17 mA Estimated at 3 V
MAX-8Q 19 18 mA Estimated at 3 V
Icc Tracking
(Continuous mode,)
MAX-8C 16 16 mA Estimated at 3 V
MAX-8Q 17 17 mA Estimated at 3 V
Icc Tracking
(Power Save mode / 1 Hz)
MAX-8C 3.8 3.7 mA Estimated at 3 V
MAX-8Q 4.7 4.7 mA Estimated at 3 V
Table 8: Indicative power requirements at 3.0 V
For more information about power requirements, see the MAX-8 / MAX-M8 Hardware Integration
Manual [1].
For more information on how to noticeably reduce current consumption, see the Power
Management Application Note [4].
12 Use this figure to dimension maximum current capability of power supply. Measurement of this parameter with 1 Hz
bandwidth.
13 Use this figure to determine required battery capacity.
14 Simulated GNSS constellation using power levels of -130 dBm. VCC= 3.0 V
15 Average current from start-up until the first fix.
X 7 Y < b="" -="" x="" y="" 1="" 7')="" l="" i="" r="" n="" y="" -="" 5="" 71—]="" l="" i="" y="" '="" v="" 2="" o="" l="" i=""> }‘ < min.="" (mm)="" typ.="" (mm)="" max.="" (mm)="" 10.0="" 10.1="" 10.7="" 9.6="" 9.7="" 9.8="" 2.2="" 2.5="" 2.7="" 0.55="" 0.65="" 0.95="" 1.0="" h="" 1.2="" 0.76="" 0.3="" 0.4="" 0.5="" 0.9="" 1.0="" 1.1="" 0.6="" 0.7="" 0.8="" 0.7="" 0.8="" 0.9="" 0.69="">
MAX-8 - Data Sheet
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Production Information
4 Mechanical specifications
Figure 3: Dimensions
For information about the paste mask and footprint, see the MAX-8 / MAX-M8 Hardware
Integration Manual [1].
MAX-8 - Data Sheet
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Production Information
5 Reliability tests and approvals
5.1 Reliability tests
All MAX-8 modules are based on AEC-Q100 qualified GNSS chips.
Tests for product family qualifications are according to ISO 16750 "Road vehicles Environmental
conditions and testing for electrical and electronic equipment”, and appropriate standards.
5.2 Approvals
The MAX-8C and MAX-8Q modules comply with the Directives 2011/65/EU and
2015/863/EU of the European Parliament and the Council on the Restriction of
Use of certain Hazardous Substances (RoHS).
m m cm xw E Pin‘l ‘m u Um m 8 Sprotket Hole u; H mm m g on u mm m E a Feed Direuion —>
MAX-8 - Data Sheet
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Production Information
6 Product handling & soldering
6.1 Packaging
MAX-8 modules are delivered as hermetically sealed, reeled tapes in order to enable efficient
production, production lot set-up and tear-down. For more information, see the u-blox Package
Information Guide [3].
6.1.1 Reels
Each reel has 500 MAX-8 GNSS modules. MAX-8 modules are shipped on Reel Type B, as specified in
the u-blox Package Information Guide [3].
6.1.2 Tapes
Figure 4 shows the position and orientation of MAX-8 modules as they are delivered on tape.
The dimensions of the tapes are specified in Figure 5.
Figure 4: Tape and module orientation
eblox /n\5-J/rr \ZJE 2m: HEEMJWEX mum , Mutt: Amt \ j , m 2 u t ‘4. mn, I» [‘7 / A i ‘D 'OQ‘CDLD‘JJ'I‘EG P ] 1H W‘Y * 1 H , l ‘ F; ‘M‘f + ‘W‘ \ 24E to v J t , L J t x‘ , l L (K t‘vL t I w a 74 W ‘H Measurements In mm. ”32] To‘erancesun‘essnmed 1P\:2 2H: IO NDIES 1. m splatkelhnle pm tummauve tol‘erance : 0.2 2 Packet posmon re‘atwe to smacks: We measured as true posmon of pocket, not pocket hole 3 A0 and Bo are ca\cu\aled on a plane at a dtstance "R“ above the bottom ol the pockel
MAX-8 - Data Sheet
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Production Information
Figure 5: MAX-8 Tape dimensions
6.2 Shipment, storage and handling
For more information regarding shipment, storage and handling, see the u-blox Package Information
Guide [3].
6.2.1 Moisture Sensitivity Levels
The Moisture Sensitivity Level (MSL) relates to the packaging and handling precautions required.
MAX-8 modules are rated at MSL level 4.
For MSL standard see IPC/JEDEC J-STD-020, which can be downloaded from www.jedec.org.
6.2.2 Reflow soldering
Reflow profiles are to be selected according to u-blox recommendations (see the MAX-8 / MAX-M8
Hardware Integration Manual [1]).
6.2.3 ESD handling precautions
MAX-8 modules are Electrostatic Sensitive Devices (ESD). Observe precautions for handling!
Failure to observe these precautions can result in severe damage to the GNSS receiver!
GNSS receivers are Electrostatic Sensitive Devices (ESD) and require special precautions when
handling. Particular care must be exercised when handling patch antennas, due to the risk of
electrostatic charges. In addition to standard ESD safety practices, the following measures should be
taken into account whenever handling the receiver:
E EDA EA®>
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Production Information
Unless there is a galvanic coupling between the local GND (i.e.
the work table) and the PCB GND, then the first point of
contact when handling the PCB must always be between the
local GND and PCB GND.
Before mounting an antenna patch, connect ground of the
device
When handling the RF pin, do not come into contact with any
charged capacitors and be careful when contacting materials
that can develop charges (e.g. patch antenna ~10 pF, coax
cable ~50 to 80 pF/m, soldering iron, …)
To prevent electrostatic discharge through the RF input, do
not touch any exposed antenna area. If there is any risk that
such exposed antenna area is touched in non ESD protected
work area, implement proper ESD protection measures in the
design.
When soldering RF connectors and patch antennas to the
receiver’s RF pin, make sure to use an ESD safe soldering iron
(tip).
MAX-8 - Data Sheet
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7 Default messages
Interface Settings
UART Output
9600 baud, 8 bits, no parity bit, 1 stop bit
Configured to transmit both NMEA and UBX protocols, but only the following NMEA (and no
UBX) messages have been activated at start-up:
GGA, GLL, GSA, GSV, RMC, VTG, TXT
UART Input 9600 baud, 8 bits, no parity bit, 1 stop bit, autobauding disabled
Automatically accepts following protocols without need of explicit configuration:
UBX, NMEA, RTCM
The GNSS receiver supports interleaved UBX and NMEA messages.
DDC Fully compatible with the I2C industry standard, available for communication with an external
host CPU or u-blox cellular modules; operated in slave mode only.
NMEA and UBX are enabled as input messages, only NMEA as output messages
Maximum bit rate 400 kb/s.
TIMEPULSE
(1Hz Nav)
1 pulse per second, synchronized at rising edge, pulse length 100 ms
Table 9: Default messages
Refer to the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2] for
information about other settings.
oblox W Pin I Marking O X ® PPP-TGV-N-XX—> Product Type Number
MAX-8 - Data Sheet
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Production Information
8 Labeling and ordering information
8.1 Product labeling
The labeling of u-blox MAX-8 GNSS modules includes important product information. The location of
the product type number is shown in Figure 6.
Figure 6: Location of product type number on MAX-8 module label
8.2 Explanation of codes
Three different product code formats are used. The Product Name is used in documentation such as
this data sheet and identifies all u-blox 8 products, independent of packaging and quality grade. The
Ordering Code includes options and quality, while the Type Number includes the hardware and
firmware versions. Table 10 shows the structure of these three different formats.
Format Structure
Product Name PPP-TGV
Ordering Code PPP-TGV-N
Type Number PPP-TGV-N-XX
Table 10: Product code formats
The parts of the product code are explained in Table 11.
Code Meaning Example
PPP Product Family MAX
TG Product Generation 8 = u-blox 8
V Variant Function set (A-Z), T = Timing, R = DR, etc.
N Option / Quality Grade Describes standardized functional element or quality grade
0 = Default variant, A = Automotive
XX Product Detail Describes product details or options, such as hardware or software revision, cable
length, etc.
Table 11: Part identification code
8.3 Ordering codes
Ordering No. Product
MAX-8C-0 u-blox 8 GNSS LCC Module, Crystal, ROM, 9.7x10.1 mm, 500 pieces/reel
MAX-8Q-0 u-blox 8 GNSS LCC Module, TCXO, ROM, Green, 9.7x10.1 mm, 500 pieces/reel
Table 12: Product ordering codes for professional grade modules
Product changes affecting form, fit or function are documented by u-blox. For a list of Product
Change Notifications (PCNs) see our website.
MAX-8 - Data Sheet
UBX-16000093 - R05 Appendix Page 25 of 27
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Appendix
A Glossary
Abbreviation Definition
AEC Automotive Electronics Council
BBR Battery Backed RAM
DDC Display Data Channel
EGNOS European Geostationary Navigation Overlay Service
ESD Electrostatic Sensitive Device*
FOC Full Operational Capability
GAGAN GPS Aided GEO Augmented Navigation
GLONASS GLObal Navigation Satellite System (Russian)
GNSS Global Navigation Satellite System
GPIO General Purpose Input/Output
GPS Global Positioning System
IMES Indoor MEssaging System
I2C Inter-Integrated Circuit
IEC International Electrotechnical Commission
ISO International Organization for Standardization
LCC Leadless Chip Carrier
LCS LoCation Services (protocol)
LNA Low Noise Amplifier
MSAS MTSAT Satellite Augmentation System
MSL Moisture Sensitivity Level
NMEA National Marine Electronics Association
PPP Point-to-Point Protocol* / Precise Point Positioning*
PCB Printed Circuit Board
PCN Product Change Notification
PPS Pulse Per Second
QZSS Quasi-Zenith Satellite System
RLM Return Link Message
RRLP Radio Resource LCS Protocol
RTC Real Time Clock
RTCM Radio Technical Commission for Maritime Services
SAW Surface Acoustic Wave
SBAS Satellite-Based Augmentation System
SCL Serial Clock
SMD Solder Mask Defined
SUPL Secure User Plane Location
TCXO Temperature-Compensated Crystal Oscillator
TTFF Time-To-First-Fix
UART Universal Asynchronous Receiver/Transmitter
UTC Coordinated Universal Time
WAAS Wide Area Augmentation System
Table 13: Explanation of the abbreviations and terms used
MAX-8 - Data Sheet
UBX-16000093 - R05 Related documents Page 26 of 27
Production Information
Related documents
[1] MAX-8 / MAX-M8 Hardware Integration Manual, Doc. No. UBX-15030059
[2] u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification (Public version), Doc.
No. UBX-13003221
[3] u-blox Package Information Guide, Doc. No. UBX-14001652
[4] Power Management Application Note, Doc. No. UBX-13005162
[5] RTCM 10402.3 Recommended Standards for Differential GNSS, Ver. 2.3, RTCM Aug. 20, 2001
[6] Radio Resource LCS Protocol (RRLP), (3GPP TS 44.031 version 11.0.0 Release 11)
For regular updates to u-blox documentation and to receive product change notifications, register
on our homepage (www.u-blox.com).
Revision history
Revision Date Name Comments
R01 25-Apr-2016 ghun Objective Specification
R02 25-May-2016 julu Advance Information
R03 26-Jul-2016 ghun Production Information
R04 28-Feb-2018 mbab Reformat
R05 02-Apr-2019 yzha Updated Section 5.2 (RoHS statement).
blox
MAX-8 - Data Sheet
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Production Information
Contact
For complete contact information, visit us at www.u-blox.com.
u-blox Offices
North, Central and South America
u-blox America, Inc.
Phone: +1 703 483 3180
E-mail: info_us@u-blox.com
Regional Office West Coast:
Phone: +1 408 573 3640
E-mail: info_us@u-blox.com
Technical Support:
Phone: +1 703 483 3185
E-mail: support@u-blox.com
Headquarters
Europe, Middle East, Africa
u-blox AG
Phone: +41 44 722 74 44
E-mail: info@u-blox.com
Support: support@u-blox.com
Asia, Australia, Pacific
u-blox Singapore Pte. Ltd.
Phone: +65 6734 3811
E-mail: info_ap@u-blox.com
Support: support_ap@u-blox.com
Regional Office Australia:
Phone: +61 2 8448 2016
E-mail: info_anz@u-blox.com
Support: support_ap@u-blox.com
Regional Office China (Beijing):
Phone: +86 10 68 133 545
E-mail: info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Chongqing):
Phone: +86 23 6815 1588
E-mail: info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Shanghai):
Phone: +86 21 6090 4832
E-mail: info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Shenzhen):
Phone: +86 755 8627 1083
E-mail: info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office India:
Phone: +91 80 405 092 00
E-mail: info_in@u-blox.com
Support: support_in@u-blox.com
Regional Office Japan (Osaka):
Phone: +81 6 6941 3660
E-mail: info_jp@u-blox.com
Support: support_jp@u-blox.com
Regional Office Japan (Tokyo):
Phone: +81 3 5775 3850
E-mail: info_jp@u-blox.com
Support: support_jp@u-blox.com
Regional Office Korea:
Phone: +82 2 542 0861
E-mail: info_kr@u-blox.com
Support: support_kr@u-blox.com
Regional Office Taiwan:
Phone: +886 2 2657 1090
E-mail: info_tw@u-blox.com
Support: support_tw@u-blox.com

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