STK14D88-RF35

Memory IC Overview

The STK14D88 is a 256Kb (32K x 8) nonvolatile static RAM featuring Quantum Trap storage. It provides unlimited read/write endurance and automatic data preservation via AutoStore on power loss, hardware control, or software commands. The device operates on a single 3.0V supply (+20%, -10%) with access times of 25, 35, or 45 ns. It supports up to 200,000 STORE cycles and retains data for 20 years. Available in 32-pin SOIC and 48-pin SSOP packages.

Memory IC Feature Summary

• Integrates fast SRAM with nonvolatile Quantum Trap storage for each memory cell
• Automatically stores data to nonvolatile memory upon power loss detection
• Supports unlimited recall operations from nonvolatile storage to SRAM
• Enables manual store and recall operations through hardware or software control

Memory IC Applications

• Industrial systems requiring reliable data retention during power interruptions
• Embedded controllers needing persistent configuration parameters
• Data logging applications with frequent write cycles
• Safety-critical systems demanding high reliability and unlimited endurance

Memory IC Procurement Notes

Verify the specific speed grade suffix (25, 35, or 45) and package type (N for SOIC, R for SSOP) against system requirements. Confirm temperature range designation (blank for commercial, I for industrial). Note that this component is marked as not recommended for new designs; evaluate alternative solutions for long-term projects.

Memory IC Selection Notes

Select based on required access time and operating temperature range. Ensure the VCAP pin is connected to an appropriate capacitor within the specified range to support AutoStore functionality. Verify interface compatibility with the host microcontroller's address and data bus configurations.

Memory IC Part Context

This part belongs to Cypress Semiconductor's nvSRAM family, combining SRAM speed with nonvolatile retention. It utilizes Quantum Trap technology to eliminate the need for external batteries or backup power supplies. The series offers various speed grades and package options to suit different footprint and performance constraints.

Memory IC Replacement Considerations

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

Memory IC FAQ

How does the AutoStore feature function?

AutoStore automatically transfers data from the SRAM array to the nonvolatile Quantum Trap cells when the VCC voltage drops below the low voltage trigger level (VSWITCH), using charge stored on the VCAP pin.

What is the endurance of the nonvolatile storage?

The device supports unlimited read and write cycles for the SRAM portion and up to 200,000 STORE cycles for the nonvolatile memory elements.

Can the AutoStore function be disabled?

Yes, the AutoStore function can be disabled via a specific software sequence of READ operations. However, a manual STORE operation must be issued to save this state through subsequent power-down cycles.