CY14B256K-SP35XI

Memory IC Overview

The CY14B256K-SP35XI 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 SRAM read/write cycles with up to 200,000 STORE operations. The device operates on a single 3V supply within the industrial temperature range of -40°C to +85°C. It offers a 35 ns access time and includes hardware store capabilities via the HSB pin.

Memory IC Feature Summary

• Integrates a full-featured Real Time Clock with leap year tracking and programmable alarms
• Employs QuantumTrap technology for high reliability and infinite SRAM cycle endurance
• Supports automatic data storage upon power loss using a small external capacitor
• Includes a watchdog timer and interrupt logic for system monitoring

Memory IC Applications

• Industrial process control systems requiring persistent data logging
• Embedded applications needing accurate timekeeping without external components
• Battery-powered devices utilizing low-power RTC backup modes
• Safety-critical systems requiring watchdog timer functionality

Memory IC Procurement Notes

Verify the specific suffix 'SP35XI' against official Infineon or Cypress documentation to confirm package type and speed grade. Ensure compatibility with existing board layouts regarding VCAP and VRTC connections. Confirm that the 35 ns access time meets system timing requirements. Check for end-of-life notices as this component originates from legacy product lines.

Memory IC Selection Notes

Select this component when both nonvolatile memory and precise timekeeping are required in a single package. It serves as a drop-in replacement for standard nvSRAMs where clock functionality is needed. Consider the 35 ns access time for system bus synchronization. Evaluate the need for battery versus capacitor backup based on application downtime expectations.

Memory IC Part Context

This part belongs to the CY14B256K family of nvSRAMs manufactured by Infineon Technologies (formerly Cypress Semiconductor). It combines standard SRAM performance with nonvolatile storage and RTC features. The device is designed for industrial environments and offers robust data protection mechanisms against power fluctuations.

Memory IC Replacement Considerations

The datasheet notes pin compatibility with the STK17T88. Verify electrical specifications and register maps before substitution. Other members of the CY14B256LA series may offer similar density but lack the integrated RTC functionality.