DS1500WEN+

Real Time Clock Overview

The DS1500WEN+ 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 within the industrial temperature range of -40°C to +85°C. The device supports 3.3V logic supply (3.0V to 3.6V) with battery backup ranging from 2.5V to 3.7V. Key specifications include automatic leap-year compensation valid until 2100, programmable watchdog timer, power-on reset, and auxiliary battery input for kickstart functionality.

Real Time Clock Feature Summary

• BCD-coded timekeeping registers with automatic leap-year correction valid through 2100
• Integrated 256-byte nonvolatile SRAM with external SRAM write protection control
• Programmable watchdog timer and time-of-day alarm with IRQ/PWR outputs
• Industrial temperature rating (-40°C to +85°C) with 3.3V operation

Real Time Clock Applications

• Remote monitoring systems
• Battery-backed data storage units
• Telecommunications switching equipment
• Office automation hardware
• Consumer electronics requiring precise timing

Real Time Clock Procurement Notes

Verify component authenticity as this part is discontinued. Confirm lead-free/RoHS compliance via the '+' suffix in the ordering code. Check for specific revision errata on the manufacturer's website before finalizing integration into new designs.

Real Time Clock Selection Notes

Select the DS1500WEN+ specifically for its industrial temperature range (-40°C to +85°C). Ensure the system design accommodates the 32-pin TSOP package dimensions. Verify that the host microcontroller supports the required 8-bit parallel bus timing constraints for read and write cycles.

Real Time Clock Part Context

This component belongs to the DS1500 family of RTCs. The 'W' designation indicates 3.3V logic compatibility, while 'N' denotes the extended industrial temperature range. The '+' suffix confirms lead-free manufacturing compliant with RoHS standards.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the device is discontinued, engineers must evaluate pin-compatible alternatives or redesign the interface to accommodate newer RTC models.