CY14B256K-SP45XI

Memory IC Overview

The CY14B256K is a 256 Kbit (32K x 8) nonvolatile static RAM featuring an integrated real-time clock. It utilizes QuantumTrap technology for data retention and supports infinite read/write cycles with up to 200,000 STORE operations. The device operates on a single 3V supply within a 2.7V to 3.6V range and offers access times of 25 ns, 35 ns, or 45 ns. It includes hardware store capabilities via the HSB pin and automatic store functionality upon power loss.

Memory IC Feature Summary

• Integrates a full-featured real-time clock with leap year tracking and programmable alarms
• Provides infinite SRAM read/write cycles alongside high-reliability nonvolatile storage
• Supports automatic data preservation during power-down events using minimal external capacitance
• Includes a watchdog timer and interrupt logic for system monitoring

Memory IC Applications

• Industrial control systems requiring persistent configuration data
• Embedded applications needing accurate timekeeping without external components
• Battery-powered devices utilizing low-power RTC backup modes
• Process control environments relying on watchdog timer protection

Memory IC Procurement Notes

Verify component authenticity through authorized Infineon distributors. Confirm package integrity and check for moisture sensitivity indicators prior to soldering. Ensure ordering suffixes match specific speed grades and temperature ranges required by the design specifications.

Memory IC Selection Notes

Select this component when simultaneous nonvolatile memory retention and precise timekeeping are required in a single package. Evaluate VCAP sizing carefully to ensure sufficient charge for reliable AutoStore operations during power transitions. Consider the 48-pin SSOP footprint constraints during PCB layout planning.

Memory IC Part Context

This part belongs to the Cypress nvSRAM family, now manufactured under Infineon Technologies following corporate acquisitions. It combines standard SRAM performance with nonvolatile data retention capabilities. The integration of the real-time clock distinguishes it from standard nvSRAM variants that lack timing functions.

Memory IC Replacement Considerations

The datasheet notes pin compatibility with the STK17T88. Verify electrical characteristics and register maps before substitution. No other direct substitute part numbers are explicitly confirmed in the provided documentation.