DS1251YP-100

Overview

The DS1251YP-100 is a nonvolatile SRAM integrated with a real-time clock and Phantom Clock technology, manufactured by Analog Devices Inc./Maxim Integrated. It provides 512KB (4096K x 8) of static RAM data retention without external battery connections during operation. The device features a parallel interface and operates within a supply voltage range of 2.97V to 3.63V or 4.5V to 5.5V. It tracks time in formats including HH:MM:SS:hh and YY-MM-DD, supporting leap years. Packaged in a 34-PowerCap Module for surface mount installation, it functions between 0°C and +70°C.

Feature Summary

• Integrates 512KB NV SRAM with a real-time clock and Phantom Clock switching mechanism
• Supports parallel bus interface with 8-bit data width
• Tracks calendar details including month, date, day, and year validity up to 2100
• Surface mountable in a 34-PowerCap™ Module package

Applications

• Industrial systems requiring persistent timekeeping and data storage
• Embedded controllers needing volatile RAM replacement with nonvolatile capabilities
• Data logging equipment maintaining timestamps during power interruptions

Procurement Notes

Verify the specific suffix 'YP' against official datasheets to confirm pinout compatibility and voltage specifications. Confirm that the 34-PowerCap Module package aligns with board layout requirements. Check current availability status as this component may be subject to lifecycle changes or limited distribution channels.

Selection Notes

Select this component when a direct drop-in replacement for standard SRAM is needed alongside precise timekeeping. Ensure the system design accommodates the 34-PowerCap Module footprint. Verify that the operating temperature range of 0°C to +70°C meets environmental constraints. Compare access times and current consumption against system power budgets.

Part Context

This part belongs to the DS1251 series of nonvolatile SRAMs with embedded clocks. It utilizes Phantom Clock technology to automatically switch between main power and an internal lithium energy source upon detecting voltage drops. This series is designed to replace traditional volatile memory solutions while maintaining accurate calendar and time data.

Replacement Considerations

Direct replacements include other DS1251 variants such as DS1251WP-120+ or DS1251Y-70, provided the package and speed grades are compatible. Verify pin-to-pin compatibility and ensure the substitute supports the required 34-PowerCap Module form factor.