DS1689SN+T&R

$4.36

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

SKU:14bae6e9a950 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS1689SN+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 28SOIC. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS1689SN+T&R

Description：IC RTC CLK/CALENDAR PAR 28SOIC
Series：-
Package：Tape & Reel (TR)
Mfr：Analog Devices Inc./Maxim Integrated
Type：Clock/Calendar
Features：NVSRAM
Memory Size：114B
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：Parallel
Voltage - Supply：2.7V ~ 3.3V, 4.5V ~ 5.5V
Voltage - Supply, Battery：2.5V ~ 3.7V
Current - Timekeeping (Max)：2mA @ 3V, 3mA @ 5V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：28-SOIC (0.337", 8.56mm Width)
Supplier Device Package：28-SOIC

Real Time Clock datasheet and documents for DS1689SN+T&R

DS1689SN+T&R

Real Time Clock Overview

The DS1689SN+T&R is a serialized real-time clock (RTC) IC in a 28-pin SOIC package, operating from -40°C to +85°C with a supply voltage of 3V to 5.5V. It features a multiplexed parallel interface and includes 114 bytes of user NV RAM. The device incorporates a 64-bit silicon serial number and supports automatic battery backup switching between VCCI, VBAT, and VBAUX inputs. Timekeeping accuracy is maintained via an external 32.768kHz crystal or oscillator, with leap year compensation valid through 2100.

Real Time Clock Feature Summary

Integrated 64-bit unique silicon serial number for system identification
114-byte nonvolatile RAM with automatic write protection during power transitions
Supports +3V or +5V operation with autosense capability
Power control circuitry enabling system wake-up via alarm or kickstart input

Real Time Clock Applications

PC motherboard clock/calendar systems
Industrial data logging requiring time-stamping
Network node address assignment using serial numbers
Warranty tracking systems utilizing elapsed time counters

Real Time Clock Procurement Notes

Verify the 'SN' suffix confirms the industrial temperature range (-40°C to +85°C). Confirm the '+T&R' designation indicates tape and reel packaging. Ensure the source document explicitly lists this specific part number variant as available or discontinued status.

Real Time Clock Selection Notes

Select this component when a parallel interface is required alongside integrated NV RAM and serial number capabilities. Verify that the host system can support the multiplexed address/data bus timing. Check if the 114-byte internal RAM suffices or if external SRAM connection via VCCO/CEO is necessary.

Real Time Clock Part Context

This part belongs to the DS1689/DS1693 family, serving as a successor to the DS1287 PC clock standard. It combines RTC functionality with NV RAM control and power management features. The SN variant specifically denotes the industrial temperature grade within the SOIC package lineup.