Infineon Technologies 5962-9232404MYA

Overview

5962-9232404MYA from Cypress Semiconductor is a 64 Kbit (8 K × 8) nonvolatile static RAM (nvSRAM) with QuantumTrap technology, supporting 35 ns access time, single 5 V ±10% supply, and military temperature range (–55 °C to +125 °C). It performs automatic hardware RECALL on power-up and software-initiated STORE/RECALL cycles, used in avionics data logging and mission-critical embedded control systems where power-loss resilience is mandatory.

For engineers reviewing the 5962-9232404MYA datasheet, 5962-9232404MYA pinout, 5962-9232404MYA application, or 5962-9232404MYA equivalent, key selection criteria include guaranteed 100-year data retention, unlimited SRAM read/write endurance, 1 million STORE cycles, hardware protect against low-voltage writes, and compatibility with standard 28-pin CDIP footprints in harsh-environment designs.

Technical Context

The STK11C68-5 integrates a standard 8 K × 8 SRAM array with a parallel nonvolatile shadow memory using QuantumTrap cell technology-each bit retains data without external capacitors or batteries. Its dual-mode operation enables seamless SRAM access while allowing deterministic STORE/RECALL via six-address software sequences.

Hardware RECALL triggers automatically when VCC rises above VSWITCH after brownout or power cycle, completing in tHRECALL (≤10 ms); STORE inhibits during VCAP < VSWITCH to prevent corruption. Control logic uses CE-, OE-, and WE-active-Low timing aligned with JEDEC SRAM standards, ensuring drop-in replacement capability for legacy 28-pin SRAMs.

Key Specifications

Pinout & Package

28-pin Ceramic Dual In-line Package (CDIP), 300 mil width, hermetic ceramic body with solder-dip leads. Pin 1 marked by notch or dot; pin 14 and 15 are NC and A11 respectively; VCAP pin (Pin 27) requires external 4.7 µF tantalum capacitor for STORE energy hold.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile SRAM applications.

Compared with the 5962-9232404MYA, the -4 and -3 variants trade access speed for lower active current and relaxed timing margins-enabling optimization for power-constrained or legacy avionics platforms without sacrificing data retention, STORE endurance, or hermetic packaging integrity.

Availability

5962-9232404MYA is available at Aetrix Electronics and suitable for avionics flight data recorders, missile guidance subsystems, tactical radio secure boot modules, and spacecraft telemetry buffers requiring stable component supply under MIL-PRF-38535 Class B sourcing.

Supply support for 5962-9232404MYA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for aerospace, defense, and industrial markets, with heritage in radiation-hardened and military-qualified components.

The STK11C68 product line delivers nonvolatile SRAM functionality using QuantumTrap technology-engineered specifically for mission-critical systems where data persistence across uncontrolled power loss is non-negotiable.

FAQ

What is the role of the VCAP pin and what capacitor value is required?

The VCAP pin supplies energy for the nonvolatile STORE operation when VCC drops below VSWITCH. A 4.7 µF solid tantalum capacitor rated for ≥10 V must be connected between VCAP and VSS, placed within 5 mm of the device. This capacitor sustains STORE completion for ≥20 ms after VCC collapse, per MIL-STD-704A transient profiles.

Does the 5962-9232404MYA require external circuitry to enable automatic RECALL on power-up?

No external circuitry is required for hardware RECALL-it triggers autonomously when VCC exceeds VSWITCH (~4.25 V). However, a 10 kΩ pull-up resistor from WE to VCC is recommended to prevent SRAM corruption if the device exits RECALL while WE is floating or LOW during power ramp-up.

How is STORE/RECALL sequence immunity to accidental activation ensured?

STORE and RECALL are initiated only by six consecutive CE-controlled READ cycles to exact addresses (0x0000, 0x1555, 0x0AAA, 0x1FFF, 0x10F0, then 0x0F0F or 0x0F0E). WE must remain HIGH throughout; any intervening WRITE or address violation aborts the sequence-ensuring robustness against noise or firmware errors.

Is the 5962-9232404MYA compatible with commercial-grade SRAM sockets?

Yes-the 28-pin CDIP footprint matches industry-standard 64 Kb SRAMs (e.g., HM6264, CY6264). No layout changes are needed for drop-in replacement; however, VCAP capacitor addition and WE pull-up are mandatory for full nvSRAM functionality in existing designs.