A42MX36-FPQG208 - 54K Gate 5V FPGA, 208-QFP | Microchip
MPN: A42MX36-FPQG208 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $58 | $58.00 |
| 10 | $52.5 | $525.00 |
| 100 | $47.2 | $4,720.00 |
| 500 | $43.1 | $21,550.00 |
| 1,000 | $39.8 | $39,800.00 |
A42MX36-FPQG208 Overview
An FPGA (Field-Programmable Gate Array) is a semiconductor device containing a fabric of configurable logic blocks (CLBs), routing resources, and I/O cells that designers program in the field. Within the programmable logic hierarchy, the MX family sits as a single-chip ASIC alternative, bridging PLDs, CPLDs, and ASICs for high-volume, cost-sensitive designs.
Key features include 1184 logic cells across 1184 CLBs, embedded dual-port SRAM modules optimized for FIFOs, LIFOs, and scratchpad memory, wide-decode modules, and selectable PCI output drives achieving 100% compliance with PCI specification version 2.1 (per the 40MX/42MX families datasheet). A low-power mode turns off all inputs and outputs, reducing current consumption below 500 uA.
The MX architecture provides deterministic, antifuse-based one-time programmability, making it attractive for design security, single-event robustness considerations, and long-lifecycle industrial platforms. The 208-QFP surface-mount package supports conventional reflow assembly without ball-grid-array inspection overhead, easing prototyping and rework for legacy-form-factor boards.
Typical applications include legacy PLD consolidation, industrial control glue logic, PCI bus interface logic, mil-aero-style long-lifecycle systems, and high-volume ASIC prototyping where 5V-tolerant I/O is required.
Design consideration: as a one-time-programmable antifuse device, functional verification must be completed via simulation and (if available) emulation before programming; plan I/O banking carefully between 3.3V and 5V domains to respect drive and tolerance limits. Pricing and stock below are as of 2026-08-30.
Drop-in alternatives for A42MX36-FPQG208 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with A42MX36-FPQG208 (same form factor and footprint) — differing in Package, RoHS Status, System Gates, Family, Logic Cells.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
A42MX36-PQG208I
✅ Drop-In✓ In Stock
$55 / Unit
View Datasheet →A42MX36-1PQG208
✅ Drop-In✓ In Stock
$45.3 / Unit
View Datasheet →A42MX24-1PQG208I
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →A42MX24-1PQG208M
✅ Drop-In✓ In Stock
$43.2 / Unit
View Datasheet →A42MX24-3PQG208I
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1 / Unit
View Datasheet →A42MX36-FPQG208 Maximum Ratings & Electrical Characteristics
| Family | MX (42MX) |
| System Gates | 54000 |
| Logic Cells | 2438 |
| CLBs | 1184 |
| Total RAM Bits | 2560 |
| Number of I/O | 176 |
| Core Voltage | 5 V |
| I/O Voltage | 3.3 V / 5 V |
| Process Technology | 0.45 um CMOS |
| Programming Type | Antifuse (one-time programmable) |
| Package | 208-BFQFP (28x28 mm) |
| Mounting Type | Surface Mount (SMD) |
| Operating Temperature | 0C to +70C |
| Low Power Mode Current | < 500 uA |
| PCI Compliance | PCI spec v2.1 (selectable output drives) |
| Embedded Memory Type | Dual-port SRAM (FIFO/LIFO/scratchpad) |
A42MX36-FPQG208 Pin Configuration
| Pin 1 | IO — User I/O (bank assignment per datasheet pin tables) |
| Pin 5 | VCC — Core supply, 5.0 V |
| Pin 24 | GND — Ground |
| Pin 54 | IO/GCLK — User I/O or global clock input |
| Pin 104 | VCCIO — I/O bank supply, 3.3V or 5V |
| Pin 120 | IO — User I/O, 5V tolerant option |
| Pin 158 | IO/SDI — User I/O / programming data in |
| Pin 174 | GND — Ground |
| Pin 195 | VPP — Programming voltage supply |
| Pin 208 | IO — User I/O |
Typical Applications
A42MX36-FPQG208 is suitable for 6 applications: Legacy 5V System Integration, PCI Bus Interface Logic, Industrial Control and Glue Logic, ASIC Prototyping and Bridge Design, Long-Lifecycle Embedded Systems, Embedded Dual-Port SRAM Datapath.
Legacy 5V System Integration
The A42MX36-FPQG208's 5.0V core and 3.3V/5V I/O architecture make it a rare modern-production choice for maintaining legacy 5V backplanes and boards. With 54,000 gates and 176 user I/Os, multiple legacy PAL/GAL/PLD devices can be consolidated into one package, cutting BOM count and board area. The 208-BFQFP can be reworked with standard hot-air tools, and antifuse one-time programming means no configuration flash to become obsolete. Confirm I/O bank voltage assignment during migration since mixed 3.3V/5V banking drives PCB layout.
Recommended
PCI Bus Interface Logic
A42MX24 and A42MX36 devices offer selectable PCI output drives enabling 100% compliance with PCI specification version 2.1, per the 40MX/42MX families datasheet. The 176 user I/Os provide ample pins for 32/64-bit PCI signals plus arbitration and interrupt logic, while wide-decode modules accelerate address decoding. Antifuse determinism avoids configuration-time bus hangs. Place the 208-BFQFP close to the PCI connector with short stub traces to preserve signal integrity at 33 MHz.
Recommended
Industrial Control and Glue Logic
In factory automation and process control, the A42MX36-FPQG208 implements state machines, bus bridges, and peripheral control in one 54K-gate device. The 0C to +70C commercial grade suits cabinet-mounted controllers, while the low-power mode (<500 uA with all I/Os off) supports standby requirements. Embedded dual-port SRAM (2560 bits) buffers sensor FIFO data without external memory. Its antifuse configuration is immune to configuration-upset concerns of SRAM FPGAs in noisy industrial environments.
Recommended
ASIC Prototyping and Bridge Design
MX FPGAs are positioned by Microchip as a reliable single-chip ASIC alternative for high-volume platforms. Designers use the A42MX36-FPQG208 to prototype datapath and control logic at 47-79 MHz system speeds (per FPGAkey family data) before committing to mask ROM or to serve as a permanent bridging solution where ASIC volumes never justify NRE. The 0.45 um process and deterministic routing simplify timing closure for moderate-speed designs.
Recommended
Long-Lifecycle Embedded Systems
Systems requiring 10-20 year availability, such as test equipment, medical device controllers, and specialty instrumentation, benefit from the MX family's long production history and Microchip's longevity commitment. Antifuse programming removes external boot flash from the reliability equation, and the 208-BQFP through-hole-rework-friendly package eases field repair. 1184 CLBs and 2560 RAM bits cover typical controller logic with margin. Document speed grade selection early since suffix-specific availability can become limited.
Recommended
Embedded Dual-Port SRAM Datapath
The A42MX36 contains embedded dual-port SRAM modules optimized for high-speed datapath functions such as FIFOs, LIFOs, and scratchpad memory, per the 40MX/42MX families datasheet. The 2560 total RAM bits implement ping-pong buffers between asynchronous clock domains or stage data between the FPGA fabric and a host microcontroller. Combined with wide-decode modules, this suits address/data steering and protocol adaptors at moderate clock rates without external SRAM.
Recommended
Recommended Products Summary
Engineering reference data for A42MX36-FPQG208 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A42MX36-PQG208I | A42MX36-1PQG208 | A42MX24-1PQG208I |
|---|---|---|---|---|
| Package | 208-BFQFP (28x28 mm) | PQFP-208 - same footprint | PQFP-208 - same footprint | PQFP-208 - same footprint |
| Brand | Microchip Technology (Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 54000 | 54000 | 54000 | 36000 |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | Commercial grade | -40C to +85C (industrial) |
| Core / I/O Voltage | 5.0 V / 3.3V-5V | 5.0 V / 3.3V-5V | 5.0 V / 3.3V-5V | 5.0 V / 3.3V-5V |
| Programming Technology | Antifuse (OTP) | Antifuse (OTP) | Antifuse (OTP) | Antifuse (OTP) |
Key Differentiators
- 54K gates vs 36K in same footprint (vs A42MX24-1PQG208I)
- 5V-tolerant core architecture (vs A42MX36-1PQG208)
- Extended temperature option (vs A42MX36-PQG208I)
Design Notes
The MX family operates a 5.0V core with 3.3V/5V I/O. Provide separate VCCIO planes per I/O bank so mixed-voltage interfaces are correctly biased, and respect the sub-500 uA low-power mode requirement that all inputs and outputs be turned off during standby. Decouple each VCC/VCCIO pin pair with 0.1 uF ceramics; 54K antifuse gates have modest dynamic current but PCI drive modes can create simultaneous-switching noise.
This is a one-time-programmable antifuse FPGA: there is no reconfiguration. Complete post-place-and-route timing simulation and verify all I/O constraints in Designer/Libero software before generating the fuse file. Order device samples for programming-flow validation early, since broker data indicates limited supply status for this legacy MPN.
The 208-BFQFP has 0.5 mm pitch leads on a 28x28 mm body. Use 4-mil trace/space for fanout, place a 10x10 via-field under the exposed lead ring for return current, and keep PCI-compliant drive output traces impedance-controlled (per PCI spec v2.1 loading). Avoid routing under the package center where the die paddle sits.
Compliance Information
Compliance data not explicitly stated in retrieved distributor results; verify on Microchip product page environmental documents.
