A54SX72A-FGG256 - 108K Gate Antifuse FPGA, 256-FBGA | Microchip
MPN: A54SX72A-FGG256 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $188.78 | $188.78 |
| 10 | $179.35 | $1,793.50 |
| 100 | $169.9 | $16,990.00 |
| 500 | $161.41 | $80,705.00 |
| 1,000 | $153.34 | $153,340.00 |
Drop-in alternatives for A54SX72A-FGG256 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX72A-1FGG256
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View Datasheet →A54SX72A-2FGG256
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$217.72 / Unit
View Datasheet →A54SX72A-FG256
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$89 / Unit
View Datasheet →A54SX72A-FGG256M
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$136 / Unit
View Datasheet →A54SX72A-1FGG256M
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$258.66 / Unit
View Datasheet →A54SX72A-FGG256 Maximum Ratings & Electrical Characteristics
| Family | SX-A (Antifuse FPGA) |
| System Gates | 108,000 gates |
| Typical Usable Gates | 72,000 gates |
| Logic Cells | 6,036 cells |
| User I/O | 203 |
| Supply Voltage | 2.5 V |
| Technology | 0.25 um CMOS antifuse |
| Maximum Toggle Frequency | 217 MHz |
| Package | 256-ball FBGA (FGG256), 1.0 mm pitch |
| Mounting Type | Surface Mount |
| Programming Type | One-time programmable (antifuse), nonvolatile |
| Configuration Memory | Not required (nonvolatile) |
| Clock Networks | CLKA, CLKB, QCLK quadrant clocks plus hard-wired global clocks |
| Lead Free | Yes (per distributor data) |
| RoHS Status | Compliant |
A54SX72A-FGG256 256-ball fbga (fgg256), 1.0 mm pitch Pin Configuration Guide
Complete pinout information for A54SX72A-FGG256 (256-ball fbga (fgg256), 1.0 mm pitch package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for A54SX72A-FGG256.
Refer to the datasheet for full pin configuration.
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
A54SX72A-FGG256 is suitable for 6 applications: Legacy System Obsolescence Mitigation, Industrial Automation and Motor Control Glue Logic, Defense and Aerospace Program Logic, Telecommunications Backplane Bridging, Single-Chip Logic Integration (74-Series Replacement), Test and Measurement Instrument Logic.
Legacy System Obsolescence Mitigation
The A54SX72A-FGG256 is a primary choice for sustaining legacy industrial and avionics platforms originally designed around Actel SX/SX-A antifuse FPGAs. Because the SX-A family preserves the Actel architectural lineage, existing netlists compiled in Actel Libero/Designer can be recompiled into this die without logic redesign, and the 203 user I/O and 2.5V supply match legacy board rails directly. Its nonvolatile antifuse configuration removes configuration PROMs from the BOM - often the very parts that have gone obsolete. Designers should re-verify timing at the standard speed grade against original -1/-2 timing reports, and procure buffer stock given the device's mature lifecycle status.
Recommended
Industrial Automation and Motor Control Glue Logic
In factory automation controllers, the A54SX72A-FGG256 consolidates PLC glue logic, encoder interfaces, and interlock state machines into one 108K-gate chip, replacing dozens of 74-series devices. The antifuse fabric's low interconnect capacitance keeps dynamic power low even at the 217 MHz ceiling, and deterministic one-time programming suits systems that must power up instantly without configuration delay. On a 24V industrial board, the 2.5V core integrates cleanly with existing low-voltage rails via a simple buck regulator. The FBGA-256's 1.0 mm pitch is manageable with standard 4-layer PCB processes, and instant-on behavior eliminates the boot-sequence complexity SRAM FPGAs would add.
Recommended
Defense and Aerospace Program Logic
The M-suffix variant A54SX72A-FGG256M shares the identical FBGA-256 footprint with military screening, making this die family a staple of defense upgrade programs. Antifuse FPGAs are valued in aerospace payloads because configuration cannot be upset by single-event effects in the same way SRAM configuration can - there is no external bitstream to corrupt, supporting SEU-resilient system architecture. The nonvolatile, instantly-available logic suits power-critical satellites and missiles where SRAM FPGA configuration loading is undesirable. Design teams typically prototype with commercial grade and fly the screened M variant, exactly the drop-in path Microchip designed for this family.
Recommended
Telecommunications Backplane Bridging
Telecom line cards and backplane adapters historically used SX-A devices for bus bridging, clock distribution, and protocol framing. The A54SX72A-FGG256 offers 203 user I/O - enough to bridge wide parallel buses - and dedicated CLKA, CLKB, and quadrant clock networks that deliver low-skick clocking to timing circuits across the die, as described in Microchip's quadrant clock application notes. The 217 MHz toggle capability covers SONET-framing auxiliary logic and T1/E1 glue functions. Instant-on antifuse configuration means the card participates in backplane enumeration immediately at power-up, a practical advantage over SRAM FPGAs that need hundreds of milliseconds to load configuration.
Recommended
Single-Chip Logic Integration (74-Series Replacement)
A core SX-A value proposition is replacing multiple discrete logic ICs with one low-cost chip. A board with fifteen to twenty 74HC/74F devices can typically be absorbed into the 6,036-cell fabric of the A54SX72A-FGG256, cutting board area, assembly cost, and failure points simultaneously. The 2.5V supply and I/O structures accommodate legacy board domains, and the one-time-programmed fabric behaves like hardwired logic - no firmware to corrupt or reload. Because the antifuse design is fixed, this approach suits products with stable, mature logic requirements rather than evolving designs. Engineering effort concentrates on Libero simulation and test-pattern development, then production devices are programmed and locked.
Recommended
Test and Measurement Instrument Logic
Bench instruments and automated-test fixtures benefit from the A54SX72A-FGG256's deterministic, instant-on behavior: trigger chains, counter/timer prescalers, and fixture handshaking logic are active the moment power is applied, with no configuration latency that would skew time-zero measurements. The 217 MHz capability supports prescaler and event-counting functions, while 203 user I/O connects to fixture relays and comparators. Nonvolatile antifuse programming also aids instrument security and repeatability - the shipped logic image cannot drift or be overwritten in the field. Integration of calibration mux control and status logic into one die further reduces analog-front-end noise coupling on dense fixture PCBs.
Recommended
Recommended Products Summary
Engineering reference data for A54SX72A-FGG256 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX72A-1FGG256 | A54SX72A-2FGG256 | A54SX72A-FG256 | A54SX72A-FGG256M |
|---|---|---|---|---|---|
| Package | FBGA-256 (1.0 mm pitch) | FBGA-256 - same | FBGA-256 - same | FBGA-256 - same (lead-bearing) | FBGA-256 - same (military) |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 108,000 | 108,000 | 108,000 | 108,000 | 108,000 |
| User I/O | 203 | 203 | 203 | 203 | 203 |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Speed Grade | Standard | -1 (faster) | -2 (fastest) | Standard | Standard (military) |
| Temperature Screening | Commercial/Industrial | Commercial/Industrial | Commercial/Industrial | Commercial/Industrial | Military (M suffix) |
| Lead Finish | Lead-free (green, GG) | Lead-free (GG) | Lead-free (GG) | Lead-bearing (FG) | Lead-free (GG, military) |
| Unit Price (qty 1) | $188.78 as of 2026-09-03 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Instant-on nonvolatile operation (vs SRAM FPGAs (e.g., Lattice XP2 class))
- Largest density in the SX-A family (vs A54SX32A-1TQG144I)
- Military-screened drop-in path (vs A54SX72A-FGG256M)
- Trade-off: one-time programmable (vs A54SX72A-FGG256 (itself) vs SRAM FPGAs)
Design Notes
The A54SX72A runs from a single 2.5V supply. Estimated power: dynamic dissipation scales with toggle rate and antifuse interconnect utilization; a fully utilized 6,036-cell design clocking quadrant networks at 100 MHz typically dissipates on the order of a few hundred milliwatts - verify with the Actel/Microchip power calculator and Libero power estimator for your exact netlist. Decouple each of the VCCA/VCCI supply balls with 0.1 uF ceramic capacitors placed within 3 mm of the ball, plus bulk 10 uF per power domain. Confirm I/O bank voltage settings in Libero before layout freeze.
The FBGA-256 package uses a 1.0 mm ball pitch with 16x16 ball grid. Fan out with via-in-pad or dog-bone escapes on a minimum 4-layer stackup; 0.15 mm laser vias with 0.25 mm pads allow single-row escape on outer layers. Follow the ball map in the SX-A family datasheet exactly - power, ground, and clock balls are fixed, while user I/O is assigned in Libero Designer and should be locked before routing to avoid an unroutable assignment. Reflow profile must comply with the datasheet MSL rating (marked [DATA_NEEDED] above; check the shipping bag label).
Antifuse programming is permanent: a defective design cannot be reworked in-circuit. Always complete full simulation, timing closure, and - ideally - prototype in a reprogrammable device (Microchip's RTSX-S prototyping path was designed for pin-compatible SX-A prototyping in matching packages, per the Actel RTSX-S prototyping application note) before committing production antifuse parts. Also program spare devices with the identical fuse map and retain the programming file under revision control; a lost programming file for a one-time-programmable die is unrecoverable.
Use the dedicated CLKA, CLKB, and QCLK quadrant clock inputs for all high-fanout clocks rather than routing clocks through general fabric, as recommended in the Microchip quadrant clocks application notes for the A54SX72A - this preserves duty cycle and minimizes skew across the die. Keep 203 user I/O edge rates controlled where driving board-level buses; series termination of 22-33 ohms at the driver is a practical starting point for backplane-class loads. Maintain solid return planes under every I/O bank to control crosstalk on the 1.0 mm-pitch breakout region.
Compliance Information
RoHS compliant and lead free per distributor listings (PCB Electronics, FindIC) for the GG suffix. Lead-bearing FG256 variant exists for non-RoHS legacy programs. REACH, halogen-free, and conflict-minerals status not stated in provided data.
