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 a byte-wide parallel interface, 256 bytes of nonvolatile SRAM, and operates at +3.3V with an active supply current of up to 10mA. The device provides automatic leap-year compensation valid through the year 2100, a programmable watchdog timer, and a time-of-day alarm. It includes precision power-on reset, battery monitors, and auxiliary battery input capabilities. The component is housed in a 32-pin TSOP package and supports commercial operating temperatures from 0°C to +70°C.

Real Time Clock Feature Summary

• Y2K-Compliant RTC with BCD-coded registers for century, year, month, date, day, hours, minutes, and seconds
• 256 Bytes of onboard Nonvolatile (NV) SRAM with NV control for external SRAM backup
• Programmable Watchdog Timer and Time-of-Day Alarm with IRQ/PWR outputs
• +3.3V Operation with Precision Power-On Reset and Automatic Battery Backup Switching

Real Time Clock Applications

• Remote Systems
• Battery-Backed Systems
• Telecom Switches
• Office Equipment
• Consumer Electronics

Real Time Clock Procurement Notes

Verify the specific ordering suffix 'W' confirms the +3.3V voltage range and commercial temperature grade (0°C to +70°C). Confirm the '+' suffix indicates lead-free/RoHS compliance. Check for any manufacturer errata associated with this revision before finalizing procurement specifications.

Real Time Clock Selection Notes

Select the DS1500WE+ when a +3.3V supply is required alongside a 32-pin TSOP surface-mount package. Ensure the application utilizes a parallel interface architecture. For industrial temperature ranges (-40°C to +85°C), the DS1500WEN+ variant must be selected instead.

Real Time Clock Part Context

The DS1500WE+ belongs to the DS1500 family of real-time clocks. It shares core functionality with variants such as the DS1500YE+ (+5V operation) and the DS1500WEN+ (industrial temperature range). The primary distinction of the WE+ suffix is its specific voltage rating and commercial temperature classification within the TSOP package form factor.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.