A54SX16-CQ256

Overview

The A54SX16-CQ256 is a Field Programmable Gate Array (FPGA) from the Microsemi SX family, manufactured using CMOS technology. It features 1452 Configurable Logic Blocks (CLBs) and an equivalent of 16000 system gates. The device supports a maximum clock frequency of 205 MHz with a CLB-maximum combinational delay of 1 ns. It is housed in a Cavity-Up, Ceramic, QFP-256 package containing 256 terminals. The component operates within a supply voltage range of 2.97 V to 3.63 V, with a nominal voltage typically defined by the series specifications.

Feature Summary

• Nonvolatile configuration storage enabling instant-on operation without external configuration memory.
• Configurable I/O blocks supporting mixed-voltage standards including 3.3 V, 5 V TTL, and 2.5 V LVCMOS.
• Hot-swap compliant I/Os allowing safe insertion and removal under power.
• Power-up/down friendly design eliminating the need for complex supply voltage sequencing.

Applications

• Industrial control systems requiring deterministic logic processing.
• Telecommunications infrastructure utilizing PCI-compliant interfaces.
• Military and aerospace applications demanding radiation tolerance and high reliability.
• Test and measurement equipment requiring flexible digital signal processing.

Procurement Notes

Verify the specific suffix codes against official Microsemi documentation to confirm temperature grade, speed bin, and RoHS compliance status. Ensure the ceramic QFP-256 package matches the target PCB footprint and thermal requirements. Confirm availability through authorized distributors as legacy FPGA components may have limited stock or discontinuation notices.

Selection Notes

Select this model when a nonvolatile FPGA solution with approximately 16000 system gates is required. Verify that the 205 MHz performance meets the timing constraints of the target application. Consider the 256-pin ceramic package for environments requiring robust mechanical stability and hermetic sealing compared to plastic alternatives.

Part Context

This component belongs to the Microsemi Actel SX family of FPGAs, which are characterized by their antifuse-based nonvolatile architecture. The SX series bridges the gap between simple PLDs and complex ASICs, offering reprogrammability during development while maintaining the security and simplicity of fixed logic in production. The CQ256 designation indicates the specific ceramic quad flatpack package variant.

Replacement Considerations

Direct pin-to-pin replacements within the same gate count and package are limited due to the proprietary antifuse technology. Review the A54SX16A series for updated process nodes or the A54SX32 series for increased logic density if performance headroom is needed. Always validate electrical parameters and I/O configurations before substituting.