DS1500WE

Real Time Clock Overview

The DS1500WE is a Y2K-compliant real-time clock/calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features an 8-bit parallel interface, 256 bytes of nonvolatile SRAM, and operates at +3.3V with a battery backup range of 2.5V to 3.7V. The device provides century, year, month, date, day, hours, minutes, and seconds data in BCD format with automatic leap-year compensation valid up to the year 2100. It includes programmable watchdog timers, alarms, power-on reset, and battery monitors. Operating temperature ranges from 0°C to +70°C.

Real Time Clock Feature Summary

• BCD-coded timekeeping registers with automatic leap-year compensation valid through 2100
• Integrated 256-byte nonvolatile SRAM with external SRAM backup control
• Programmable watchdog timer and time-of-day alarm functions
• Precision power-on reset and auxiliary battery input support

Real Time Clock Applications

• Remote systems requiring precise timekeeping
• Battery-backed embedded systems
• Telecom switches
• Office equipment
• Consumer electronics

Real Time Clock Procurement Notes

Verify component authenticity and physical condition upon receipt. Confirm that the marking matches 'DS1500W' for this specific commercial temperature variant. Check for lead-free/RoHS compliance indicators on the package top mark. Ensure storage conditions adhere to moisture sensitivity level requirements prior to soldering.

Real Time Clock Selection Notes

Select the DS1500WE when a +3.3V logic supply is required alongside a parallel interface architecture. This model supports commercial operating temperatures (0°C to +70°C). For industrial temperature ranges (-40°C to +85°C), consider the DS1500WEN+ variant instead. Ensure system design accommodates the 32-pin TSOP package dimensions.

Real Time Clock Part Context

This component belongs to the DS1500 family of real-time clocks. It shares core functionality with variants such as the DS1500YE+, which operates at +5.0V, and the DS1500YEN+, designed for industrial environments. All models utilize the same 32-pin TSOP footprint and register map, differing primarily in voltage tolerance and temperature specifications.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available.