A42MX16-2TQG176I - 24K Gate 5V FPGA TQFP-176 | Microchip
MPN: A42MX16-2TQG176I ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for A42MX16-2TQG176I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A42MX16-TQG176I
✅ Drop-In📋 Reference alternative (not in catalog)
A42MX16-2TQG176
✅ Drop-In✓ In Stock
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View Datasheet →A42MX16-3TQG176
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View Datasheet →A42MX16-1TQG176I
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View Datasheet →A42MX24-3TQG176
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View Datasheet →A42MX09-2TQG176
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$27.5 / Unit
View Datasheet →A42MX16-2TQG176I Maximum Ratings & Electrical Characteristics
| Family | MX (42MX) |
| System Gates | 24000 gates |
| Logic Cells | 1232 |
| CLBs | 608 |
| Number of I/O | 140 |
| Supply Voltage | 3V ~ 3.6V, 4.5V ~ 5.5V |
| Max Clock Frequency | 129 MHz / 215 MHz |
| Process Technology | 0.45 um |
| Speed Grade | -2 |
| Operating Temperature | -40C to +85C (TA) |
| Temperature Grade | Industrial (I) |
| Package | 176-LQFP / TQFP (24x24 mm) |
| Pin Pitch | 0.5 mm |
| Mounting Type | Surface Mount |
| Programmability | One-time programmable (antifuse) |
| Lead Free | Yes (G suffix) |
| RoHS Status | Compliant |
A42MX16-2TQG176I Pin Configuration
| Pin 1 | IO — User configurable I/O (TQFP-176 bank A) |
| Pin 10 | VDD — Core supply (3V~3.6V or 4.5V~5.5V) |
| Pin 20 | GND — Ground |
| Pin 31 | CLK — Dedicated clock input (per MX pin tables) |
| Pin 44 | IO — User configurable I/O |
| Pin 88 | GND — Ground |
| Pin 89 | VDD — Core supply |
| Pin 132 | IO — User configurable I/O |
| Pin 176 | IO — User configurable I/O (bank D) |
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
A42MX16-2TQG176I is suitable for 6 applications: Legacy PLD Consolidation, Industrial Control Systems, 5V Legacy System Interface, ASIC Prototyping and Bridge Logic, Communications and Networking Interface Cards, Test and Measurement Equipment.
Legacy PLD Consolidation
The A42MX16-2TQG176I excels at consolidating multiple legacy PALs, GALs, and 22V10-class PLDs into a single 24K-gate device, as Microchip explicitly positions the MX family for integrating legacy PLDs into one low-cost device. Its 5.0V-tolerant architecture matches the 5V TTL I/O levels of the legacy components being replaced, eliminating level-shifting circuitry. Designers typically migrate the original ABEL or CUPL equations into Libero SoC and fit them into the 608 CLBs, cutting board area, part count, and procurement SKUs while retaining the original through-hole era timing margins at 129/215 MHz maximum frequencies.
Recommended
Industrial Control Systems
With an industrial temperature rating of -40C to +85C (TA) and dual 3.3V/5V supply capability, the A42MX16-2TQG176I suits factory automation controllers, motor-drive interface boards, and PLC I/O modules. The 140 user I/O provide ample pins for parallel sensor and actuator interfaces, while the one-time-programmable antifuse fabric gives deterministic timing and immunity to configuration bitstream corruption from industrial noise. Because the device powers from a 4.5V~5.5V rail, it connects directly to 5V industrial logic without translators, and the TQFP-176 package withstands typical industrial reflow and vibration profiles.
Recommended
5V Legacy System Interface
Older backplane and equipment designs built around 5V TTL cannot directly interface with modern 1.8V/2.5V FPGAs. The A42MX16-2TQG176I accepts a 4.5V~5.5V core/IO supply, letting it sit directly on a 5V VME, ISA-era, or custom parallel bus. Its 24K gates absorb address decoding, bus arbitration, wait-state generation, and glue logic that previously occupied dozens of 74-series devices. The 0.45um process and MX architecture tolerate the 5V signal environment natively, making this part a common choice for medical equipment service boards, test fixtures, and avionics ground equipment still locked to 5V ecosystems.
Recommended
ASIC Prototyping and Bridge Logic
Microchip markets MX as a reliable single-chip ASIC alternative, making the A42MX16-2TQG176I useful for low-volume ASIC bridge logic, mask-rom emulation, and prototyping of small gate-array designs. The one-time-programmable antifuse fabric provides ASIC-like determinism - no configuration time at power-up and consistent interconnect delay - which matters when emulating an ASIC's power-up behavior. Designers use the 608 CLBs to map netlists generated from ASIC synthesis flows, and the 215 MHz class routing supports moderate clock domains during functional verification before mask commit.
Recommended
Communications and Networking Interface Cards
Interface cards for legacy telecom and networking equipment frequently need 5V-tolerant glue logic, address decoders, and simple protocol state machines. The A42MX16-2TQG176I implements these functions with 140 I/O and clock rates up to 129 MHz for the -2 grade, sufficient for E1/T1 framing support logic, HDLC framing assists, and backplane handshaking. The dual-rail operation (3V~3.6V and 4.5V~5.5V) lets one device bridge a modern 3.3V microcontroller section to a 5V line-card section, and the industrial temperature rating supports outdoor and unconditioned telecom cabinets.
Recommended
Test and Measurement Equipment
Bench instruments, automated test equipment (ATE), and rack systems from the 5V era rely on programmable logic for trigger logic, timing generators, and scan controllers. The A42MX16-2TQG176I's deterministic antifuse timing suits precision trigger paths, and its 24K gates absorb counter/timer and comparator-interface logic. Because one-time programming removes configuration boot time, instruments power up in their functional state immediately - an advantage over SRAM FPGAs in production test environments where every second of boot delay counts. The TQFP-176 footprint eases replacement in existing socket-compatible designs.
Recommended
Recommended Products Summary
Engineering reference data for A42MX16-2TQG176I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A42MX16-TQG176I | A42MX16-2TQG176 | A42MX24-3TQG176 | A42MX09-2TQG176 |
|---|---|---|---|---|---|
| Package | TQFP-176 (24x24 mm) | TQFP-176 - same | TQFP-176 - same | TQFP-176 - same | TQFP-176 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 24000 | 24000 | 24000 | ~36000 (MX24) | ~9000 (MX09) |
| Speed Grade | -2 | Standard | -2 | -3 (faster) | -2 |
| Number of I/O | 140 | 140 | 140 | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | Commercial (0C to +70C) | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Voltage | 3V~3.6V, 4.5V~5.5V | 3V~3.6V, 4.5V~5.5V | 3V~3.6V, 4.5V~5.5V | 3V~3.6V, 4.5V~5.5V | 3V~3.6V, 4.5V~5.5V |
| Max Clock Frequency | 129 MHz / 215 MHz | lower than -2 grade | 129 MHz / 215 MHz | higher than -2 grade | [DATA_NEEDED] |
Key Differentiators
- Native 5V-tolerant dual-rail I/O (vs Modern SRAM FPGAs (e.g., Artix-7 class))
- Deterministic one-time-programmable timing (vs A42MX16-TQG176I (same die))
- Lowest cost per gate in TQFP-176 footprint (vs A42MX24-3TQG176)
Design Notes
The A42MX16-2TQG176I uses dual supply ranges of 3V~3.6V and 4.5V~5.5V per the MX architecture. Decouple each VDD pin pair on the TQFP-176 with 0.1uF ceramic capacitors placed within 3 mm of the pin, plus bulk 10uF at the board level. Since MX devices are one-time programmable with no configuration current surge, inrush is dominated by decoupling charge, but 5V-rail ripple still affects I/O timing margins - regulate with an LDO or buck rated for the 5V rail load of 140 switching I/O.
MX antifuse FPGAs are one-time programmable: unlike SRAM FPGAs there is no reconfiguration, so functional bugs require a new device. Fully verify the design in simulation and, if possible, prototype on a faster/lower-cost die-mate before committing industrial-grade -2 parts to production. Also confirm the temperature grade in the ordering code: A42MX16-2TQG176 (commercial, 0C~+70C) and A42MX16-2TQG176I (industrial, -40C~+85C) are physically identical but not interchangeable in specification.
The 176-TQFP (24x24 mm) has a 0.5 mm pin pitch - specify a nominal 0.5 mm pitch land pattern per the Microsemi/Microchip 40MX/42MX datasheet DS2136 package section and use solder-mask-defined pads to reduce bridging risk in reflow. Fan out with 0.2 mm via-in-escape traces; all 176 pins are perimeter-mounted, so route the two dedicated clock inputs with short, direct traces and a local ground return to preserve the 129 MHz class timing.
Compliance Information
G-suffix ordering code indicates lead-free/green package; distributor listing (PCB Electronics) explicitly marks 'LEAD FREE'. REACH and halogen-free status not stated in verified data.
