DS1685Q-5+T&R

$4.80

Description：IC RTC CLK/CALENDAR PAR 28PLCC
Series：-

SKU:26fbf2905508 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1685Q-5+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 28PLCC. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1685Q-5+T&R

Description：IC RTC CLK/CALENDAR PAR 28PLCC
Series：-
Package：Tape & Reel (TR)
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：4.5V ~ 5.5V
Voltage - Supply, Battery：2.5V ~ 3.7V
Current - Timekeeping (Max)：3mA @ 5V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：28-LCC (J-Lead)
Supplier Device Package：28-PLCC (11.51x11.51)

Real Time Clock datasheet and documents for DS1685Q-5+T&R

DS1685Q-5+T&R

Real Time Clock Overview

The DS1685Q-5+T&R is a real-time clock (RTC) IC from Analog Devices/Maxim Integrated, designed as a successor to the DS1285 standard. It operates at +5V with an industrial temperature range of -40°C to +85°C and is housed in a 28-pin PLCC package. The device provides timekeeping via a multiplexed parallel bus interface, supporting both 12-hour and 24-hour formats with Y2K compliance and leap-year compensation through 2099. It integrates 242 bytes of battery-backed NV SRAM, a 64-bit silicon serial number, and power-control circuitry for system wake-up functions.

Real Time Clock Feature Summary

Multiplexed parallel bus interface with 242 bytes of user-accessible NV SRAM
Industrial temperature grade (-40°C to +85°C) with +5V operation
Integrated power-control circuitry enabling system power-on via alarm or kickstart input
32.768kHz square-wave output for power management activities

Real Time Clock Applications

Embedded systems requiring nonvolatile timekeeping
Utility meters needing precise date and time tracking
Security systems with alarm-based wake-up capabilities
Network hubs, bridges, and routers for timestamping

Real Time Clock Procurement Notes

Verify that the specific ordering suffix corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the lead-free/RoHS-compliant status indicated by the '+' designation aligns with environmental regulations applicable to the target manufacturing region. Ensure the industrial temperature rating meets operational requirements.

Real Time Clock Selection Notes

Select this component when a parallel interface is required for direct compatibility with legacy PC RTC designs. The +5V voltage specification distinguishes it from the +3V variants. The PLCC package requires appropriate footprint design considerations compared to surface-mount alternatives like TSSOP or SOIC. Verify that the system supports the multiplexed address/data bus timing constraints.

Real Time Clock Part Context

This part belongs to the DS1685 family, which serves as a drop-in replacement for industry-standard DS1285, DS1385, DS1485, and DS1585 RTCs. The 'Q' suffix denotes the 28-pin PLCC package, while '-5' indicates the +5V operating voltage. The '+T&R' suffix specifies the RoHS-compliant device supplied in a tape and reel configuration for high-volume production.