DS1685E-3

$3.60

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

SKU:c299d1f6b522 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1685E-3 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 DS1685E-3

Description：IC RTC CLK/CALENDAR PAR 24TSSOP
Series：-
Package：Tube,Tube
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：0°C ~ 70°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 DS1685E-3

DS1685E-3

Real Time Clock Overview

The DS1685E-3 is a real-time clock (RTC) manufactured by Analog Devices Inc./Maxim Integrated, designed as a successor to the industry-standard DS1287 PC clock. It operates at +3V and features a multiplexed address/data bus interface for system connectivity. The device includes a 64-bit silicon serial number, power-control circuitry for system wake-up, and a 32kHz output for power management. It provides 242 bytes of battery-backed non-volatile RAM and supports Y2K compliance with leap-year compensation valid through 2099. The component is housed in a 24-pin TSSOP package and functions within an operating temperature range of 0°C to +70°C.

Real Time Clock Feature Summary

Multiplexed Address/Data Bus Interface
242 Bytes Battery-Backed Non-Volatile RAM
Y2K Compliant with Leap-Year Compensation
Power-Control Circuitry for Wake-Up/Alarm

Real Time Clock Applications

Embedded Systems
Utility Meters
Security Systems
Network Hubs, Bridges, and Routers

Real Time Clock Procurement Notes

Verify that the specific part number matches the required voltage and temperature grade. Confirm the package type is TSSOP-24. Ensure the ordering suffix corresponds to the desired tape and reel or cut tape format if applicable. Check for lead-free/RoHS compliance status indicated by the '+' suffix.

Real Time Clock Selection Notes

Select the DS1685E-3 when a +3V supply is available and a TSSOP-24 surface-mount package is required. This variant is suitable for commercial applications operating between 0°C and +70°C. For industrial temperature ranges (-40°C to +85°C), consider the DS1685EN-3+ variant instead.

Real Time Clock Part Context

The DS1685E-3 belongs to the DS1685/DS1687 family of 3V/5V Real-Time Clocks. It serves as a direct replacement for older Dallas Semiconductor RTCs like the DS1287, offering enhanced features such as a silicon serial number and auxiliary battery input while maintaining compatibility with existing BIOS software.