A42MX16-1TQG176I - 24K Gate 5V FPGA, TQFP-176 | Microchip
MPN: A42MX16-1TQG176I ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $42.5 | $42.50 |
| 10 | $39.1 | $391.00 |
| 100 | $35.8 | $3,580.00 |
| 500 | $32.4 | $16,200.00 |
| 1,000 | $29.9 | $29,900.00 |
A42MX16-1TQG176I Overview
An FPGA (Field-Programmable Gate Array) is a semiconductor device containing a fabric of configurable logic blocks and programmable interconnects that engineers configure after manufacturing. Within the programmable logic hierarchy, the MX family sits under antifuse-based one-time-programmable FPGAs, which are predecessors of flash- and SRAM-based FPGA families and are widely used where design permanence, low cost, and instant-on behavior matter more than reprogrammability.
Key features include the flexible 5.0V-tolerant MX architecture, 119 MHz system performance for this speed grade, one-time-programmable antifuse technology that removes configuration PROMs and eliminates configuration-readback security concerns, and a broad mix of I/O standards supporting legacy 5V bus interfacing. The antifuse fabric also delivers low net delays suitable for glue logic consolidation, state machines, and address decoding in high-volume products.
Architecturally, the 42MX device combines combinatorial and sequential modules with dedicated routing, integrating multiple legacy PLDs into one low-cost device. The 176-TQFP surface-mount package offers a practical 0.5 mm pin pitch for standard SMT assembly while providing 140 user-accessible I/O for bus-wide designs.
Typical applications include legacy PLD consolidation in industrial control, telecom line cards, avionics and defense upgrades of 5V systems, and high-volume embedded logic where the design is frozen at production. Its 5V I/O directly interfaces with TTL/5V CMOS devices without level shifters.
Design consideration: because MX devices are one-time programmable, verify the bitstream thoroughly in simulation and on an equivalent device before programming production units; plan power sequencing for the dual 3.3V/5V rails per the datasheet guidelines.
Drop-in alternatives for A42MX16-1TQG176I — 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 A42MX16-1TQG176I (same form factor and footprint) — differing in RoHS Status, Package, System Gates, Supply Voltage, Logic Cells.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
A42MX24-1TQG176I
✅ Drop-In✓ In Stock
$23.9 / Unit
View Datasheet →A42MX16-TQG176M
✅ Drop-In✓ In Stock
$61.2 / Unit
View Datasheet →A42MX16-3TQG176
✅ Drop-In✓ In Stock
$1 / Unit
View Datasheet →A42MX09-2TQG176
✅ Drop-In✓ In Stock
$27.5 / Unit
View Datasheet →A42MX09-TQG176A
✅ Drop-In✓ In Stock
$32.1 / Unit
View Datasheet →A42MX24-TQG176M
✅ Drop-In✓ In Stock
$54.9 / Unit
View Datasheet →A42MX16-1TQG176I Maximum Ratings & Electrical Characteristics
| Family | MX (42MX) |
| System Gates | 24000 |
| Logic Cells | 608 |
| User I/O | 140 |
| Speed Grade | -1 |
| System Performance | 119 MHz / 198 MHz |
| Core Supply Voltage | 3.3 V / 5 V |
| Process Technology | 0.45 um |
| Programming Technology | Antifuse (one-time programmable) |
| Package | 176-TQFP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Lead Free | Yes (G suffix) |
| Packaging | Tray |
| Program Memory Type | OTP (no external configuration PROM required) |
| RoHS Status | Compliant |
A42MX16-1TQG176I Pin Configuration
| Pin 1-176 | I/O / dedicated pins — 140 user-programmable I/O plus VCC, GND, VPP (programming), and VCOM pins; exact assignment per DS2316 datasheet TQ176 pin table |
Typical Applications
A42MX16-1TQG176I is suitable for 6 applications: Legacy PLD Consolidation, Industrial Control Systems, Defense and Avionics Sustainment, Telecom Line Cards, ASIC Prototyping and Bridge Logic, Automotive In-Cabin Logic.
Legacy PLD Consolidation
The MX family is explicitly positioned by Microchip as an ideal platform for integrating legacy PLDs into a single low-cost device. Multiple 22V10-class PALs/GALs, decoders, and glue-logic chips can be absorbed into the 24K gates of the A42MX16, reducing BOM count and board area. The 5V-tolerant I/O directly drives and receives legacy TTL/5V CMOS levels, eliminating level shifters, while the antifuse fabric powers up instantly with the configuration permanently programmed - no microcontroller or flash reload is needed at boot.
Recommended
Industrial Control Systems
In PLC I/O modules, motor control glue logic, and machine-interface boards, the A42MX16-1TQG176I provides 140 user I/O at industrial -40C to +85C ratings. Its 5V operation matches the 24V-backed sensor and relay logic domains common on factory floors after simple conditioning, and its 119 MHz system performance handles high-speed counters and encoder interfaces. The one-time-programmable antifuse configuration resists bit-flips and cannot be corrupted by power interruptions, a reliability benefit over SRAM FPGAs in unattended industrial environments.
Recommended
Defense and Avionics Sustainment
The MX family serves defense sustainment programs where 5V architectures persist and obsolescence mitigation is critical. Microchip offers the identical die in military (M, -55C to +125C) and MIL-STD-883 Class B ceramic packages such as CQFP-172, enabling a path from the commercial TQ176 part to qualified parts without redesign. The one-time-programmable fabric has no configuration bitstream readback, aligning with anti-tamper expectations. The A42MX16-1TQG176I is used for prototyping and commercial-temperature units before migrating to M-grade equivalents.
Recommended
Telecom Line Cards
Legacy telecom backplanes and line cards built around 5V TTL signaling use the A42MX16 for framing logic, address decoding, and bus arbitration. The device's 5V-tolerant, 5V-driven I/O banks interface directly with T1/E1 framer companion circuits of that generation, and 608 logic cells accommodate moderate sequential logic at the 119 MHz speed grade. Because the configuration is programmed at the factory, line cards power up operational in under a millisecond - a requirement for hot-swap and carrier-grade availability targets.
Recommended
ASIC Prototyping and Bridge Logic
Before committing to an ASIC tape-out, designers map control logic to the A42MX16 as a low-cost single-chip ASIC alternative per Microchip's positioning. At 24K gates the device represents a mid-size glue/bridge domain, and the antifuse delay characteristics provide realistic timing verification. In production it frequently stays as the permanent bridge between modern processors and legacy 5V peripherals, with the 140 I/O absorbing wide parallel buses that would otherwise consume a MCU's entire port budget.
Recommended
Automotive In-Cabin Logic
Microchip's automotive-grade MX datasheet highlights in-cabin telematics and automobile interconnect applications for the 40MX/42MX families. The A42MX09-TQG176A and related A-suffix devices consolidate body-electronics glue logic - switch matrix scanning, lamp diagnostics, and bus bridging - into one instant-on device that passes cold-crank voltage conditions. While the standard I-grade A42MX16-1TQG176I suits development and industrial use, the same TQ176 footprint allows direct migration to automotive-qualified siblings for production programs.
Recommended
Recommended Products Summary
Engineering reference data for A42MX16-1TQG176I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A42MX24-1TQG176I | A42MX16-TQG176M | A42MX16-3TQG176 | A42MX09-2TQG176 |
|---|---|---|---|---|---|
| Package | 176-TQFP | 176-TQFP - same | 176-TQFP - same | 176-TQFP - same | 176-TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 24000 | 36000 | 24000 | 24000 | 9000 |
| User I/O | 140 | 140 | 140 | 140 | 140 |
| Supply Voltage | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V |
Key Differentiators
- True 5V I/O without level shifters (vs A42MX24-1TQG176I)
- More logic headroom in identical footprint (vs A42MX09-2TQG176)
- Industrial grade with lead-free construction (vs A42MX16-TQG176M)
Design Notes
MX devices are one-time programmable antifuse FPGAs. Once programmed, the configuration cannot be changed or read back. Complete functional simulation and verify the bitstream on a dev-grade part before programming production units, since a design change after programming requires physically replacing the device. Budget spare units for rework.
The A42MX16 requires dual 3.3V and 5.0V rails (3V-3.6V and 4.5V-5.5V ranges). Decouple each rail with 0.1uF ceramic capacitors at multiple package corners plus bulk 10uF per rail. Follow the DS2316 datasheet guidance on VPP programming pin handling on the PCB - do not load the programming pin during normal operation.
The 176-TQFP has a 0.5 mm pitch; use standard Gull-wing land pattern per IPC-SM-782-style TQ176 footprint and inspect solder joints with X-ray or AOI on center rows. Keep 5V-tolerant I/O traces away from high-dV/dt switching nodes. Unused I/O should be configured per datasheet recommendations to avoid floating inputs.
At 0.45 um process and typical glue-logic utilization, junction heating is low; the TQFP-176 plastic package dissipates typical MX-family power without a heatsink. Still, compute estimated static plus dynamic power with the Libero power calculator if running at high toggle rates across all 140 I/O, and confirm junction temperature stays within the -40C to +85C industrial rating.
Compliance Information
G suffix denotes lead-free per Kynix and PCB Electronics listings; RoHS compliant per distributor listings. Separate automotive-grade MX variants (A suffix) exist for AEC applications.
