All prices are in US dollars.
Digi-Key Part Number DS1340U-33+-ND
Price Break Unit Price Extended Price
1 3.37000 3.37
10 3.20100 32.01
25 2.96000 74.00
50 2.81200 140.60
100 2.54000 254.00
250 2.41300 603.25
1,000 1.76256 1,762.56
Quantity Available Digi-Key Stock: 3,187
Can ship immediately

Manufacturer Standard Lead Time 10 Weeks
Manufacturer Part Number


Lead Free Status / RoHS Status Lead free / RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)

Quantity Item Number ? Customer Reference

When requested quantity exceeds displayed pricing table quantities, a lesser unit price may appear on your order.
You may submit a request for quotation on quantities which are greater than those displayed in the pricing table.

Datasheets DS1340
Product Photos MSOP-8
Mfg Application Notes Crystal Considerations with Maxim Real-Time Clocks (RTCs)
Using the Dallas Tricklecharge Timekeeper
Interfacing the DS1307 with an 8051-Compatible Microcontroller
Using the Dallas Tricklecharge Timekeeper
Design Considerations for Maxim Real-Time Clocks
Lithium Coin-Cell Batteries: Predicting an Application Lifetime
Using the DS32kHz with Maxim Real-Time Clocks
Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks
FAQ About the Integrated-Crystal Package Option
Selecting a Backup Source for Real-Time Clocks
Oscillator Design Considerations for Low-Current Applications
Demonstrating Green Technology with Apples, Oranges, Lemons, and Limes
Adding Intelligence to LED Lighting
State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
Product Training Modules Lead (SnPb) Finish for COTS
Long-Term Supply Program
DS1307 Real Time Clocks
EDA / CAD Models ? Download from Accelerated Designs
Standard Package ? 50

Integrated Circuits (ICs)


Clock/Timing - Real Time Clocks

Series -
Packaging ? Tube?
Type Clock/Calendar
Features Leap Year, Trickle-Charger
Memory Size -
Time Format HH:MM:SS (24 hr)
Date Format YY-MM-DD-dd
Interface I²C, 2-Wire Serial
Voltage - Supply 2.97 V ~ 5.5 V
Voltage - Supply, Battery 1.3 V ~ 5.5 V
Current - Timekeeping (Max) 150µA @ 5.5V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package 8-uMAX
Online Catalog Serial Address
Other Names DS1340U33
Alternate Package | This part is also available in the following packaging:
Digi-Key Part Number Manufacturer Part Number Manufacturer Packaging Quantity Available Unit Price Minimum Quantity
DS1340U-33+TR-ND DS1340U-33+T&R Maxim Integrated Tape & Reel (TR)? 0
1.53000 3,000
DS1340U-33+CT-ND DS1340U-33+T&R Maxim Integrated Cut Tape (CT)? 1,832 - Immediate
3.38000 1
DS1340U-33+DKR-ND DS1340U-33+T&R Maxim Integrated Digi-Reel®? 1,832 - Immediate
Digi-Reel® 1

Tape & Reel, Cut Tape and Digi-Reels are all derived from the same manufacturer’s part number. Inventory from Tape & Reel is used to fulfill Cut Tape and Digi-Reel orders and will impact the total quantity available.

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17:14:18 6/28/2016