A42MX24-3PQG208I - 36K Gate 5V FPGA, PQFP-208 | Microchip
MPN: A42MX24-3PQG208I ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $1 | $10.00 |
| 100 | $1 | $100.00 |
| 500 | $1 | $500.00 |
| 1,000 | $1 | $1,000.00 |
Drop-in alternatives for A42MX24-3PQG208I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A42MX24-1PQG208I
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View Datasheet →A42MX36-PQG208I
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$55 / Unit
View Datasheet →A42MX36-1PQG208
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$45.3 / Unit
View Datasheet →A42MX24-3PQG208
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A42MX16-1PQG208I
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$299.95 / Unit
View Datasheet →A42MX24-3PQG208I Maximum Ratings & Electrical Characteristics
| Family | 42MX (MX FPGA) |
| System Gates | 36000 |
| Logic Cells | 912 |
| User I/O | 176 |
| Supply Voltage | 3.3 V / 5 V (dual) |
| Speed Grade | -3 |
| Technology | 0.45 um antifuse |
| Programming Type | One-time programmable (antifuse), non-volatile |
| I/O Standard | MultiPlex I/O, mixed 3.3V/5.0V, programmable PCI |
| PCI Compliance | PCI Local Bus Specification version 2.1 |
| Special Blocks | D-modules for wide-decode (CPLD-like) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 208-BFQFP (PQFP-208), gull wing, square |
| Mounting Type | Surface Mount |
| Terminal Finish / Form | [DATA_NEEDED: terminal finish], gull wing |
| RoHS Status | [DATA_NEEDED: RoHS status] |
A42MX24-3PQG208I Pin Configuration
| Pin [DATA_NEEDED] | VDD (multiple) — 5.0V core/IO supply pins |
| Pin [DATA_NEEDED] | VDDI (multiple) — 3.3V I/O supply pins |
| Pin [DATA_NEEDED] | GND (multiple) — Ground pins |
| Pin [DATA_NEEDED] | CLK (multiple) — Global clock inputs |
| Pin [DATA_NEEDED] | I/O (176 total) — MultiPlex user I/O supporting 5.0V/3.3V, programmable PCI |
| Pin [DATA_NEEDED] | MODE — Programming mode control |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
A42MX24-3PQG208I is suitable for 6 applications: 5V PCI Bus Interface, Legacy PLD and Glue Logic Integration, Industrial Control and Automation, ASIC Prototyping and Bridge Logic, Military and Rugged System Upgrades, Mixed-Voltage System Bridging.
5V PCI Bus Interface
The A42MX24-3PQG208I is fully compliant with the PCI Local Bus Specification version 2.1 and its MultiPlex I/O structure supports programmable PCI at both 5.0V and 3.3V. This makes it well suited to legacy industrial PCs, test systems, and embedded controllers requiring a native 5V PCI interface without level translators. Implemented in the antifuse fabric, the PCI state machine is non-volatile at power-up, eliminating configuration delay and providing deterministic bus availability. The 176 user I/Os accommodate the full PCI signal set plus auxiliary glue logic in one device.
Recommended
Legacy PLD and Glue Logic Integration
MX FPGAs are positioned by Microchip as a single-chip ASIC alternative for integrating legacy PLDs into one low-cost, high-volume device. The A42MX24's 36K gates and 912 cells consolidate multiple PAL/GAL/22V10-era devices, while D-modules deliver CPLD-class wide-decode performance for address decoding and chip-select generation. Dual 3.3V/5V operation lets the device directly interface with older 5V TTL buses and newer 3.3V logic simultaneously. Because the antifuse configuration is non-volatile, legacy boards power up functional immediately without configuration controllers.
Recommended
Industrial Control and Automation
With an industrial temperature rating of -40C to +85C and 5V-tolerant I/O, the A42MX24-3PQG208I fits factory automation controllers, motor-drive interface cards, and sensor aggregation boards. Its D-module wide-decode circuitry executes fast, wide-input AND functions comparable to CPLDs, ideal for safety interlock decoding and rapid address comparison. The one-time-programmable antifuse architecture resists configuration upsets in electrically noisy industrial environments where SRAM FPGAs might require configuration scrubbing. Low-power mode further benefits thermally constrained sealed enclosures.
Recommended
ASIC Prototyping and Bridge Logic
The MX family provides a reliable, low-cost platform for prototyping ASIC-like logic before committing to masks. The A42MX24's 36K system gates support moderate-sized RTL designs, and the antifuse fabric delivers ASIC-like deterministic timing with no configuration latency. Designers use the -3 speed grade to validate timing-critical interfaces at speed. Microchip's Libero design suite supports the full HDL flow. For teams migrating legacy FPGA designs, the MX family preserves the 5.0V I/O compatibility common on older board designs.
Recommended
Military and Rugged System Upgrades
Antifuse FPGAs are historically favored in defense and aerospace upgrades because their one-time-programmable, non-volatile configuration tolerates radiation and vibration better than SRAM alternatives, and the A42MX24 industrial variant extends availability for long-lifecycle platforms. The 5V I/O compatibility supports maintenance of legacy mil-spec backplanes and 5V TTL card cages. Wide-decode D-modules implement address decoding and bus arbitration for processor subsystem upgrades. Long-term availability from Microchip's mature MX platform supports obsolescence-management programs.
Recommended
Mixed-Voltage System Bridging
The A42MX24's MultiPlex I/O enables genuine mixed-voltage system design, supporting 5.0V and 3.3V signaling on the same device with a low-power mode. This suits bridge applications between legacy 5V microprocessor buses and modern 3.3V peripherals, avoiding discrete level-shifters. The 176 I/Os provide enough capacity for a 16-bit bus bridge with control and parity in one chip, and the antifuse fabric's non-volatile configuration ensures the bridge is active at first power-on. PCI v2.1 programmable compliance further eases host-bus interfacing.
Recommended
Recommended Products Summary
Engineering reference data for A42MX24-3PQG208I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A42MX24-1PQG208I | A42MX36-PQG208I | A42MX16-1PQG208I |
|---|---|---|---|---|
| Package | PQFP-208 (BFQFP) | PQFP-208 - same | PQFP-208 - same | PQFP-208 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 36,000 | 36,000 | 54,000 | 18,000 |
| Speed Grade | -3 (fastest) | -1 (slowest) | -1 | -1 |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
| Supply Voltage | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V |
| Programming Technology | Antifuse (OTP, non-volatile) | Antifuse (OTP) | Antifuse (OTP) | Antifuse (OTP) |
| User I/O | 176 | 176 | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Fastest speed grade in PQFP-208 family (vs A42MX24-1PQG208I)
- Same-footprint upgrade path to higher density (vs A42MX36-PQG208I)
- Native 5V/3.3V mixed-voltage I/O (vs Xilinx XC4000XL family)
Design Notes
The A42MX24 requires both 5.0V and 3.3V supply domains. Decouple each VDD/VDDI pin pair with 0.1uF ceramic capacitors placed within 2mm of the pin, plus bulk 10uF per supply rail. Follow the power-up sequencing guidance in the 40MX/42MX datasheet (DS2136) to avoid latch-up during mixed-rail startup. Confirm per-pin current contributions before finalizing the power budget.
This is a one-time-programmable antifuse device. Unlike SRAM FPGAs, you cannot erase and reprogram - every design iteration consumes a new device. Complete behavioral and timing simulation against the -3 speed grade in Microchip Libero before committing. Reserve at least 10-15% spare logic capacity for late ECOs, since gate utilization above 85% complicates place-and-route timing closure.
For 5V PCI operation at 33MHz, match trace lengths on the PCI bus group and honor PCI Local Bus Spec v2.1 loading rules (maximum 10 loads per bus segment without buffering). Use the device's programmable PCI I/O characteristics per the DS2136 datasheet rather than external termination, and keep stubs under 0.5 inch on clock lines to preserve setup/hold margins.
The PQFP-208 fine-pitch (0.5mm lead pitch) gull-wing package requires careful solder-paste stencil design; use a 1:1 aperture with reduced-thickness stencil to prevent bridging. Provide at least 2x2 thermal relief via grid under the die center region. Inspect with X-ray or AOI after reflow since J-lead visibility under the package body is limited.
Compliance Information
Compliance data not present in the provided verified web data. PQFP-208 versions of the MX family exist in both leaded and lead-free (G suffix) variants per Microchip naming; verify RoHS status on the Microchip product page before procurement.
