RClamp0524J Datasheet by Semtech Corporation

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PROTECTION PRODUCTS
1www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS - RailClamp®®
®®
®
RClamp0524J
RailClamp®®
®®
®
Ultra Low Capacitance TVS Arrays
Description Features
Dimensions Circuit Diagram
Revision 07/20/2010
RailClamps® are ultra low capacitance TVS arrays
designed to protect high speed data interfaces. This
series has been specifically designed to protect sensitive
components which are connected to high-speed data
and transmission lines from overvoltage caused by ESD
(electrostatic discharge), CDE (Cable Discharge Events),
and EFT (electrical fast transients).
The RClampTM0524J has a typical capacitance of only
0.30pF between I/O pins. This allows it to be used on
circuits operating in excess of 3GHz without signal
attenuation. They may be used to meet the ESD
immunity requirements of IEC 61000-4-2,
Level 4 (±15kV air, ±8kV contact discharge). Each
device is designed to protect four lines (two differential
pairs).
The RClamp0524J is in a 8-pin, RoHS/WEEE compliant,
SLP2710P8 package. It measures 2.7 x 1.0 x 0.5mm.
The leads are spaced at a pitch of 0.5mm and are fin-
ished with lead-free NiPdAu. They are designed for easy
PCB layout by allowing the traces to run straight through
the device. The combination of small size, low capaci-
tance, and high level of ESD protection makes them a
flexible solution for applications such as HDMI,
DisplayPortTM, MDDI, and eSATA interfaces.
Applications
Mechanical Characteristics
High Definition Multi-Media Interface (HDMI)
Digital Visual Interface (DVI)
DisplayPortTM Interface
MDDI Ports
LVDS
Serial ATA
ESD protection for high-speed data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-5 (Lightning) 5A (8/20μs)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Package design optimized for high speed lines
Flow-Through design
Protects four I/O lines
Low capacitance: 0.3pF typical (I/O to I/O)
Low clamping voltage
Low operating voltage: 5V
Solid-state silicon-avalanche technology
SLP2710P8 8-pin package (2.7 x 1.0 x 0.5mm)
RoHS/WEEE Compliant
Lead Pitch: 0.5mm
Lead finish: NiPdAu
Marking: Marking Code
Packaging: Tape and Reel per EIA 481
4-Line ProtectionNominal Dimensions in mm
Pin 1 Pin 2 Pin 3 Pin 4
GND
2.70
1.00
0.40
0.60 0.20
0.50
1 2
0.50
PCI Express
SEMTECH
2© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Absolute Maximum Rating
Electrical Characteristics (T=25oC)
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© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150
Ambient Temperature - TA (oC)
% of Rated Power or IPP
Clamping Voltage vs. Peak Pulse CurrentPulse Waveform
ESD Clamping for +8kV pulse per IEC 61000-4-2
0
10
20
30
40
50
60
70
80
90
100
110
0 5 10 15 20 25 30
Time (µs)
Percent of I PP
e-t
td = IPP/2
Waveform
Parameters:
tr = 8µs
td = 20µs
0.01
0.1
1
10
0.1 1 10 100 1000
Pulse Duration - tp (us)
Peak Pulse Power - PPP (kW)
0
5
10
15
20
25
30
35
40
0123456
Peak Pulse Current - IPP (A)
Clamping Voltage -VC (V)
Waveform
Parameters:
tr = 8µs
td = 20µs
Line to Gnd
Line to Line
Normalized Capacitance vs. Reverse Voltage
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
012345
Reverse Voltage - VR (V)
CJ(VR) / CJ(VR=0)
f = 1 MHz
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4© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Insertion Loss S21 - I/O to I/O
Typical Characteristics (Con’t)
Insertion Loss S21 - I/O to GND
1 2
3
START
. 030 MHz 3
STOP 000
.
000 000 MHz
CH1 S21 LOG 6 dB / REF 0 dB
1: -0.076 dB
900 MHz
2: -0.062 dB
1.8 GHz
3: -0.1087 dB
2.5 GHz
0 dB
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
1
GHz
100
MHz 3
GHz
10
MHz
1
MHz
-42 dB
-48 dB
1 2
3
START
. 030 MHz 3
STOP 000
.
000 000 MHz
CH1 S21 LOG 6 dB / REF 0 dB
1: -0.086 dB
900 MHz
2: -0.0336 dB
1.8 GHz
3: -0.126 dB
2.5 GHz
0 dB
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
1
GHz
100
MHz 3
GHz
10
MHz
1
MHz
-42 dB
-48 dB
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© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Figure 1. Flow through Layout UsingFigure 1. Flow through Layout Using
Figure 1. Flow through Layout UsingFigure 1. Flow through Layout Using
Figure 1. Flow through Layout Using
RR
RR
RClamClam
ClamClam
Clamp052p052
p052p052
p0524J4J
4J4J
4J
HDMI Connector
3
2
1
6
5
4
9
8
7
12
11
10
HDMI Connector
3
2
1
6
5
4
9
8
7
12
11
10
GND
GNDGND
GND
1
1
Design Recommendations for HDMI Protection
Adding external ESD protection to HDMI ports can be
challenging. First ESD protection devices have an
inherent junction capacitance. However, adding even a
small amount of capacitance will cause the impedance
of the differential pair to drop. Second, large packages
and land pattern requirements cause discontinuities
that adversely affect signal integrity. The
RClamp0524J is specifically designed for protection of
high-speed interfaces such as HDMI. They present
<0.3pF capacitance between the pairs while being
rated to handle >±8kV ESD contact discharges
(>±15kV air discharge) as outlined in IEC 61000-4-2.
Each device is in a leadless SLP package that is less
than 1.1mm wide. They are designed such that the
traces flow straight through the device. The narrow
package and flow-through design reduces
discontinuities and minimizes impact on signal integrity.
This becomes even more critical as signal speeds
increase.
Pin Configuration
Figure 1 is an example of how to route the high speed
differential traces through the RClamp0524J. The
solid line represents the PCB trace. The PCB traces
are used to connect the pin pairs for each line (pin 1 to
pin 8, pin 2 to pin 7, pin 3 to pin 6, pin 4 to pin 5). For
example, line 1 enters at pin 1 and exits at Pin 8 and
the PCB trace connects pin 1 and 8 together. This is
true for lines connected at pins 2, 3, and 4 also.
Ground is connected at the center tabs. One large
ground pad should be used in lieu of two separate
pads.
TDR Measurements for HDMI
The combination of low capacitance, small package, and
flow-through design means it is possible to use these
devices to meet the HDMI impedance requirements of
100 Ohm ±15% without any PCB board modification.
Figures 3 and 4 show impedance test results for a TDR
risetime of 200ps and 100ps respectively, using a
Semtech evaluation board with 100 Ohm traces through-
out. Measurements were taken using a TDR method as
outlined in the HDMI Compliance Test Specification
(CTS). In each case, the device meets the HDMI CTS
Applications Information
SLP2710P8 Pin Configuration (Top View)
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6© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Figure 2 - TDR Measurement with 200ps risetime
using Semtech Evaluation Board
A B
X-axis 1.905 2.081 (nsec)
Y-axis 101.0 107.0 (Ohm)
Figure 3 - TDR Measurement with 100ps risetime
using Semtech Evaluation Board
B
A
B
A
B
A
B
A
A B
X-axis 1.80 2.076
(nsec)
Y-axis 96 108.0
(Ohm)
Note: Measurements were taken on SLP HDMI EVAL Rev C Board that has 100Ω
differential traces impedance throughout (No trace Compensation).
Applications Information
requirement of 100 Ohm ±15% with plenty of margin.
For signal integrity purposes, the best results will be
obtained by using the RClamp0524J to protect the
high-speed differential pairs. This is because the
device is designed such that the data lines from the
connector line up with the I/O pins of the device
without altering the trace routing. Either the
RClamp0504P or RClamp0524J may be used to
protect the remaining lines (I2C, CEC, and hot plug)
depending on layout constraints.
Layout Guidelines for Optimum ESD Protection
Good circuit board layout is critical not only for signal
integrity, but also for effective suppression of ESD in-
duced transients. For optimum ESD protection, the
following guidelines are recommended:
zPlace the device as close to the connector as pos-
sible. This practice restricts ESD coupling into
adjacent traces and reduces parasitic inductance.
zThe ESD transient return path to ground should be
kept as short as possible. Whenever possible, use
multiple micro vias connected directly from the device
ground pad to the ground plane.
zAvoid running critical signals near board edges.
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© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Figure 4. HDMI Protection ExampleFigure 4. HDMI Protection Example
Figure 4. HDMI Protection ExampleFigure 4. HDMI Protection Example
Figure 4. HDMI Protection Example
Applications Information
Data 2+
Data 2-
Data 1+
Data 1-
Data 0+
Data 0-
Clk+
Clk-
CEC
SCL
SDA
Gnd
5VPower
HP Detect
RClamp0504P
RClamp0524J
RClamp0524J
To HDMI
Graphics Chip
16
Data 2+
Data 2-
Data 1+
Data 1-
Data 0+
Data 0-
Clk+
Clk-
CEC
SCL
SDA
Gnd
5VPower
HP Detect
RClamp0504P
RClamp0524J
RClamp0524J
To HDMI
Graphics Chip
16
16
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Figure 5. eSAFigure 5. eSA
Figure 5. eSATT
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ESATA
Host Plug
A +
A -
B -
B +
ESATA Device
Plug
A +
A -
B -B +
Host Tx +
Host Tx -
Host Rx -
Host Rx +
RClamp0524J
RClamp0524J
B -B -
1
1
ESATA
Host Plug
ESATA
Host Plug
A +
A -
B -
B +
B -
B +
ESATA Device
Plug
A +
A -
B -B +B -B +
Host Tx +
Host Tx -
Host Rx -
Host Rx +
Host Tx +
Host Tx -
Host Rx -
Host Rx +
RClamp0524J
RClamp0524J
B -B -B -B -
1
1
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PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
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Applications Information
Ohm
μ
DISPLAY PORT
CONNECTOR
RClamp0524J
RClamp0524J
RClamp0524J
1
1
1
Ohm
μ
DISPLAY PORT
CONNECTOR
Ohm
μ
DISPLAY PORT
CONNECTOR
DISPLAY PORT
CONNECTOR
1
1
1
Ohm
μ
DISPLAY PORT
CONNECTOR
Ohm
μ
DISPLAY PORT
CONNECTOR
RClamp0524J
RClamp0524J
RClamp0524J
1
1
1
RClamp0524J
RClamp0524J
RClamp0524J
1
1
1
Ohm
μ
DISPLAY PORT
CONNECTOR
Ohm
μ
DISPLAY PORT
CONNECTOR
Ohm
μ
DISPLAY PORT
CONNECTOR
DISPLAY PORT
CONNECTOR
Ohm
μ
DISPLAY PORT
CONNECTOR
DISPLAY PORT
CONNECTOR
1
1
1
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© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Applications Information Spice Model
RClamp0524J Spice Model
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10© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Outline Drawing - SO-8
Land Pattern - SLP2710P8
Outline Drawing - SLP2710P8
X1 .016 0.40
X1
P
G
(C)
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
NOTES:
2.
DIM
X
Y
P
G
C
MILLIMETERSINCHES
(0.875)
.008
.027
.008
.020
(.034)
0.20
0.675
0.50
0.20
DIMENSIONS
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
1.55.061Z
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
1.
Z
(.061) (1.55)
Y1
(Y1)
Y
X
P1 .024 0.60
P1
b
bbb
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D
DIM
A1
A2
A
0.250.15 0.20
0.430.30
0.08
0.10
8
0.38
2.70
0.50 BSC
MILLIMETERS
MAX
0.05
0.53
DIMENSIONS
MIN
0.00
NOM
0.47 0.03
(0.13)
0.50
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
NOTES:
1.
1.00E 2.802.60
0.90 1.10
E
DA
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PIN 1
INDICATOR
(LASER MARK)
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SEATING
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© 2011 Semtech Corp. www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0524J
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
Tape and Reel Specification
Device Orientation in Tape
Pin 1 Location
User Direction of feed
PIN 1
INDICATOR 0524J
YYWW
Marking Codes
YYWW = Date Code
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mm5.0
50.0±
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mm 50.0±5.3
mm mm4.2 1.0±0.4
mm
1.
0±0.4
mm
50.0±0.2
mm mm4.0
mm0.8
mm3.0+
mm1.0-
Ordering Information
Note: Lead finish is lead-free NiPdAu.
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