5962-9232404MYA

Overview

The SMD5962-9232404MYA is a military-grade 64 Kbit (8 K x 8) SoftStore nvSRAM utilizing Cypress QuantumTrap technology. It provides unlimited SRAM read/write endurance and 1,000,000 STORE cycles with 100-year data retention. The device operates on a single 5 V ± 10% supply within the -55 °C to +125 °C military temperature range. It offers access times of 35 ns, 45 ns, or 55 ns and features automatic hardware RECALL on power-up.

Feature Summary

• Integrates nonvolatile QuantumTrap elements into each memory cell for high reliability.
• Supports software-initiated STORE and RECALL operations via specific address sequences.
• Provides automatic hardware RECALL from nonvolatile memory to SRAM upon power-up.
• Includes hardware protection to inhibit STORE operations and SRAM writes during low voltage conditions.

Applications

• Military avionics systems requiring radiation-hardened or high-reliability memory
• Industrial control systems needing persistent configuration storage
• Automotive electronics operating in extreme temperature environments

Procurement Notes

Verify the component source against authorized distributors to ensure authenticity. Confirm that the package type matches the required footprint, as the datasheet specifies both 28-pin CDIP and LCC options. Ensure the selected speed grade aligns with system timing requirements. Check for any obsolescence notices or lifecycle status updates from the manufacturer.

Selection Notes

Select this component when unlimited SRAM write endurance is critical alongside nonvolatile data retention. It serves as a drop-in replacement for standard static RAMs while providing persistent storage capabilities. Consider the specific access time (35 ns, 45 ns, or 55 ns) required by the host processor bus. Evaluate the need for military temperature qualification (-55 °C to +125 °C) for the application environment.

Part Context

This part number corresponds to the STK11C62-5 series manufactured by Cypress Semiconductor Corporation. It is designated under the MIL-PRF-38534 specification as Class M. The 'SMD5962' prefix indicates it is a direct buy part compliant with military specifications. The device combines fast static RAM performance with nonvolatile storage in a single package.

Replacement Considerations

Direct pin-compatible replacements include other variants within the STK11C68-5 family with different speed grades or lead finishes. Verify that any substitute maintains the same QuantumTrap architecture and military temperature rating. Cross-reference with current Infineon or Cypress portfolios for updated equivalents if the original part is discontinued.

FAQ

How is the STORE operation initiated?

The STORE operation is initiated by executing a specific sequence of six CE-controlled Read cycles from addresses 0x0000, 0x1555, 0x0AAA, 0x1FFF, 0x10F0, and 0x0F0F in exact order.

What happens to the data during a power cycle?

During power-up, if VCC drops below VRESET, an internal RECALL request is latched. When VCC rises above VSWITCH, the device automatically restores data from the nonvolatile memory to the SRAM.

Can the STORE operation be inhibited?

Yes, hardware protection inhibits externally initiated STORE operations and SRAM writes when VCAP falls below the switch voltage level (VSWITCH).