DS1685EN-3+T&R

$10.51

Description：IC RTC CLK/CALENDAR PAR 24TSSOP
Series：-

SKU:024df3851f21 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1685EN-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 PAR 24TSSOP. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1685EN-3+T&R

Description：IC RTC CLK/CALENDAR PAR 24TSSOP
Series：-
Package：Tape & Reel (TR),Cut Tape (CT)
Mfr：Analog Devices Inc./Maxim Integrated
Type：Clock/Calendar
Features：Alarm, NVSRAM, Square Wave Output, Y2K
Memory Size：242B
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：Parallel
Voltage - Supply：2.7V ~ 3.7V
Voltage - Supply, Battery：2.5V ~ 3.7V
Current - Timekeeping (Max)：2mA @ 3V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：24-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：24-TSSOP

Real Time Clock datasheet and documents for DS1685EN-3+T&R

DS1685EN-3+T&R

Real Time Clock Overview

The DS1685EN-3+T&R is a real-time clock (RTC) IC in a 24-pin TSSOP package, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a +3V supply within an industrial temperature range of -40°C to +85°C. The device features a multiplexed address/data bus interface and includes 242 bytes of battery-backed NV SRAM. Key specifications include Y2K compliance, leap-year compensation through 2099, a 64-bit silicon serial number, and a 32kHz square-wave output. It supports system power-on via date/time alarms or key closures.

Real Time Clock Feature Summary

Multiplexed parallel bus interface with 242 bytes of user-accessible NV RAM
Industrial temperature grade (-40°C to +85°C) with +3V operation
Integrated power-control circuitry for wake-up alarms and kickstart inputs
Y2K compliant with leap-year compensation valid through 2099

Real Time Clock Applications

Embedded systems requiring precise timekeeping
Utility meters needing nonvolatile data retention
Security systems with alarm-based power control
Network hubs, bridges, and routers

Real Time Clock Procurement Notes

Verify the ordering suffix 'EN' confirms the industrial temperature range (-40°C to +85°C) and '+T&R' indicates tape-and-reel packaging. Confirm the '-3' suffix specifies the +3V operating voltage variant. Ensure compatibility with the 24-pin TSSOP footprint during procurement planning.

Real Time Clock Selection Notes

Select this component when a multiplexed parallel interface is required instead of I2C or SPI. The industrial temperature rating suits harsh environments. Verify that the system design can accommodate the external crystal and backup battery connections specified for the VBAT and VBAUX pins.

Real Time Clock Part Context

This part belongs to the DS1685/DS1687 family, designed as successors to the industry-standard DS1287 PC clock. The 'E' suffix denotes the TSSOP package, while 'N' indicates the industrial temperature grade. It maintains BIOS compatibility with original DS1287 functions while adding enhanced features like the silicon serial number.