DS1343E-3+T&R

$6.77

Description：IC RTC CLK/CALENDAR SPI 20TSSOP
Series：-

SKU:a6ad1a5106ba Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1343E-3+T&R is listed in the Real Time Clock range at ChipApex. The manufacturer field lists Analog Devices Inc./Maxim Integrated. Its product description is IC RTC CLK/CALENDAR SPI 20TSSOP. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1343E-3+T&R

Description：IC RTC CLK/CALENDAR SPI 20TSSOP
Series：-
Package：Tape & Reel (TR),Cut Tape (CT)
Mfr：Analog Devices Inc./Maxim Integrated
Type：Clock/Calendar
Features：Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger
Memory Size：96B
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：SPI
Voltage - Supply：2.7V ~ 5.5V
Voltage - Supply, Battery：1.3V ~ 5.5V
Current - Timekeeping (Max)：-
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：20-TSSOP

Real Time Clock datasheet and documents for DS1343E-3+T&R

DS1343E-3+T&R

Real Time Clock Overview

The DS1343E-3+T&R is a low-current real-time clock (RTC) IC manufactured by Analog Devices Inc./Maxim Integrated. It provides timekeeping and calendar functions via an SPI or 3-wire serial interface, supporting 24-hour or 12-hour formats with leap year compensation through 2099. The device features 96 bytes of battery-backed NV RAM, two programmable alarms, and interrupt outputs. Electrical specifications include a VCC supply range of 2.7V to 5.5V and a backup voltage range of 1.3V to 5.5V. Typical standby current is 250nA, with operating temperatures from -40°C to +85°C. It is housed in a 20-TSSOP package.

Real Time Clock Feature Summary

Low Timekeeping Current: Typical standby current of 250nA at VBAT = 3V.
High ESR Crystal Support: Compatible with crystals having series resistance up to 100kΩ.
Integrated Capacitive Loading: DS1343 version supports 6pF load capacitance; DS1344 supports 12.5pF.
Dual Alarm System: Two programmable time-of-day alarms with independent interrupt outputs (INT0, INT1).

Real Time Clock Applications

Medical devices requiring precise timestamping
Handheld portable electronics
Telematics systems
Embedded data logging

Real Time Clock Procurement Notes

Verify the specific suffix 'E-3' corresponds to the 2.7V nominal supply variant when sourcing replacements. Confirm the '+T&R' designation indicates tape-and-reel packaging for automated assembly. Ensure the component meets RoHS3 compliance standards as specified in the manufacturer documentation.

Real Time Clock Selection Notes

Select this model over the DS1344 if the application utilizes a crystal with a 6pF load capacitance rather than 12.5pF. Choose the '-3' suffix for systems operating with a minimum VCC of 2.7V. Consider the '-18' or '-33' variants if the system voltage rails differ significantly from the 2.7V–5.5V range.

Real Time Clock Part Context

This component belongs to the DS1343/DS1344 family of low-current RTCs. The DS1343 variant is distinguished by its internal capacitive loading designed for 6pF crystals, whereas the DS1344 is optimized for 12.5pF crystals. Both share identical pinouts, interfaces, and register maps, differing primarily in oscillator circuit tuning.