DS1687-3IND

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

SKU:d1eca9063041 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1687-3IND 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 24EDIP. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1687-3IND

Description：IC RTC CLK/CALENDAR PAR 24EDIP
Series：-
Package：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：-40°C ~ 85°C
Mounting Type：Through Hole
Grade：-
Qualification：-
Package / Case：24-DIP Module (0.600", 15.24mm)
Supplier Device Package：24-EDIP

Real Time Clock datasheet and documents for DS1687-3IND

DS1687-3IND

Real Time Clock Overview

The DS1687-3IND is a 3V real-time clock (RTC) in an encapsulated DIP package with embedded battery and crystal. It provides timekeeping, calendar functions, and 242 bytes of battery-backed NV RAM. Key features include Y2K compliance, leap-year compensation through 2099, a 64-bit silicon serial number, and power-control circuitry for system wake-up via alarm or key closure. It operates at +3V, includes a 32kHz output, and supports auxiliary battery input.

Real Time Clock Feature Summary

Encapsulated EDIP package with integrated 32.768kHz crystal and lithium battery
242 bytes of non-volatile SRAM with bank switching capability
System power-on control via date/time alarm or kickstart input
Y2K compliant with leap-year compensation valid through 2099

Real Time Clock Applications

Embedded systems requiring precise timekeeping
Utility meters needing long-term data retention
Security systems with alarm logging capabilities
Network hubs, bridges, and routers for timestamping

Real Time Clock Procurement Notes

Verify the specific ordering suffix IND indicates industrial temperature range (-40°C to +85°C). Confirm the voltage suffix corresponds to the required 3V operation. Ensure the EDIP package type matches the PCB footprint requirements. Check for lead-free/RoHS compliance markings if specified by design constraints.

Real Time Clock Selection Notes

Select the DS1687-3IND when an integrated solution with embedded battery and crystal is preferred over discrete components. Choose this part over the DS1685 if board space is limited and external crystal/battery assembly is undesirable. Verify that the 3V supply rail meets the device's operating voltage requirements of 2.7V to 3.7V for VCC.

Real Time Clock Part Context

The DS1687 series serves as a successor to the industry-standard DS1287 PC clock. It combines the RTC functionality of the DS1685 chip with a 32.768kHz crystal and lithium battery into a single self-contained unit. This integration simplifies design by eliminating external oscillator and backup power components while guaranteeing minimum 10 years of timekeeping retention.