A54SX32-CQ256

Overview

The A54SX32-CQ256 is a HiRel SX-A Field Programmable Gate Array featuring 48,000 system gates and 2,880 logic modules. It operates at a maximum internal clock frequency of 240 MHz with a pin-to-pin clock-to-out delay of 5.3 ns in military temperature conditions. The device utilizes a 0.25 µm CMOS process and supports mixed-voltage operation at 2.5 V, 3.3 V, and 5 V with 5 V input tolerance. It is housed in a 256-pin Ceramic Quad Flat Pack (CQFP) package and includes up to 228 user-programmable I/O pins.

Feature Summary

• Military-grade reliability with QML certification and MIL-STD-883 Class B compliance
• Nonvolatile antifuse architecture providing deterministic timing and design security
• Hot-swap compliant I/Os supporting cold-sparing applications without voltage sequencing
• Integrated Silicon Explorer II for unique in-system diagnostic and verification capabilities

Applications

• High-reliability military systems requiring radiation tolerance alternatives
• Spacecraft avionics and satellite communication subsystems
• Defense electronics utilizing CPLD and FPGA integration single-chip solutions
• Industrial control systems demanding deterministic user-controllable timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature range. Ensure compatibility with Actel Designer or Libero IDE software tools for programming. Confirm that the ceramic CQFP package meets the mechanical constraints of the target assembly. Check for any relevant export control classifications such as ITAR or EAR restrictions applicable to high-reliability semiconductor components.

Selection Notes

Select this component when a nonvolatile FPGA solution with guaranteed timing is required for harsh environments. The A54SX32 offers sufficient logic density for complex state machines and interface bridging. Consider the 256-pin CQFP package only if hermetic sealing is mandatory for the application. Evaluate the 240 MHz internal performance against system clock requirements to ensure adequate margin for signal propagation delays.

Part Context

This part belongs to the HiRel SX-A family, which extends the commercial SX-A architecture with enhanced quality controls. It serves as a bridge between standard commercial FPGAs and fully radiation-tolerant RadTolerant designs. The family shares architectural similarities with previous antifuse devices but offers improved routing resources and lower power consumption through its metal-to-metal interconnect structure.

Replacement Considerations

Direct replacements within the same family include the A54SX32A variant, which may offer updated speed grades or packaging options. Verify pinout compatibility before substitution. Cross-family migration to newer Microchip FPGA lines requires significant redesign due to architectural differences in logic blocks and I/O standards.