A42MX36-CQ256BX130
A42MX36-CQ256BX130 - 54K Gate FPGA, 256-CQFP | Microchip
The Microchip Technology A42MX36-CQ256BX130 is a field-programmable gate array (FPGA) from the 42MX family, offering 54,000 system gates, 1,184 logic modules, and 202 user-programmable I/O pins in a 256-pin ceramic quad flat pack (CQFP) with tie bar. It operates at 5.0 V and 3.3 V, with a maximum internal clock frequency of 131 MHz and a clock-to-out delay of 5.6 ns. The device integrates 2.5 kbits of configurable dual-port SRAM and wide-decode circuitry, making it a reliable single-chip ASIC alternative for high-volume applications.
An FPGA (field-programmable gate array) is an integrated circuit that can be configured by the customer after manufacturing to implement arbitrary digital logic functions. FPGAs belong to the programmable logic device (PLD) family, which sits above simple PLDs (SPLDs) and complex PLDs (CPLDs) in the hierarchy of programmable logic. They are used to prototype ASICs, implement glue logic, and accelerate data-path functions in systems ranging from industrial controllers to aerospace electronics.
Key features of the A42MX36-CQ256BX130 include 202 user I/Os with MultiPlex I/O support for mixed-voltage systems, programmable PCI compliance (PCI Local Bus Specification version 2.1), and a low-power mode. The device provides 5.6 ns clock-to-out, 250 MHz performance, 5 ns dual-port SRAM access, and 100 MHz FIFO operation. It is fully compliant with the PCI Local Bus Specification (version 2.1) and supports both 5.0 V and 3.3 V operation.
Technically, the A42MX36 is built on a 0.45 um CMOS process and contains 1,184 logic modules, each capable of implementing combinatorial and sequential logic. The embedded dual-port SRAM modules are optimized for high-speed datapath functions such as FIFOs, LIFOs, and scratchpad memory. The wide-decode modules enable fast address decoding and state-machine implementation. The device is available in ceramic packages screened to MIL-STD-883 levels for high-reliability applications.
Typical applications include legacy PLD integration, bus interfacing, protocol conversion, and aerospace/defense systems requiring radiation-tolerant or high-reliability components. The 5.0 V architecture makes it ideal for interfacing with legacy 5 V logic families, while the 3.3 V capability supports mixed-voltage systems. The device is also used in industrial control, test and measurement, and communication infrastructure.
When designing with this FPGA, consider the power supply decoupling: place 0.1 uF and 10 uF capacitors close to each VCC and GND pin to minimize switching noise. The device supports both 5.0 V and 3.3 V I/O, so ensure proper voltage translation for mixed-voltage interfaces. For high-speed designs, pay attention to signal integrity on the clock and data lines.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a comprehensive resource for evaluating the A42MX36-CQ256BX130.
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