A54SX72A-FG256M - 72K Gate Antifuse FPGA 256-BGA | Microchip
MPN: A54SX72A-FG256M ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for A54SX72A-FG256M — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX72A-FG256
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View Datasheet →A54SX72A-FG256M Maximum Ratings & Electrical Characteristics
| Family | SX-A |
| System Gates | 108,000 |
| Logic Gates | 72,000 |
| Logic Cells / Modules | 4,024 |
| Maximum System Frequency | 217 MHz |
| Process Technology | 0.25 um |
| Core Supply Voltage | 2.5 V |
| User I/O | 203 |
| Programmable Type | Antifuse (One-Time Programmable) |
| Package | 256-Ball FBGA (FG256) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| On-chip Clock Resources | CLKA, CLKB global clocks plus quadrant clocks (QCLK) |
A54SX72A-FG256M 256-ball fbga (fg256) Pin Configuration Guide
Complete pinout information for A54SX72A-FG256M (256-ball fbga (fg256) 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-FG256M.
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-FG256M is suitable for 6 applications: Industrial Control and Automation, Communications and Networking Line Cards, Avionics and Defense Subsystems, Legacy Design Sustainment and Obsolescence Bridging, Single-Chip Logic Integration / Cost Reduction, Test and Measurement Instrumentation.
Industrial Control and Automation
The A54SX72A-FG256M suits industrial control backplanes and automation controllers where 72K gates of glue logic, bus arbitration, and state machines can be consolidated into one instantly-active chip. Because the antifuse configuration is active at power-up with no configuration load time, PLC I/O modules and motor-control interface boards come up immediately when the 24V industrial rail energizes the on-board 2.5V regulator. The 203 user I/O accommodate parallel fieldbus interfaces, encoder inputs, and discrete control signals, while the 217 MHz capability covers fast counter and comparator functions. Its immunity to configuration corruption also improves uptime in electrically noisy factory environments.
Recommended
Communications and Networking Line Cards
In telecom and networking line cards, the A54SX72A-FG256M implements bus bridging, framing logic, and interface adaptation between MACs, PHYs, and backplane connectors. The 217 MHz toggle capability and dedicated CLKA/CLKB global clocks plus quadrant clocks (QCLK) allow multiple clock domains typical of line-card architectures. Antifuse determinism means the link logic is present the moment power is applied, simplifying bring-up sequencing with line-card processors. The 256-ball FBGA's 0.25 um 2.5V process keeps static power low, important for high-slot-count chassis thermal budgets, while the 203 I/O support wide parallel data paths.
Recommended
Avionics and Defense Subsystems
The A54SX72A-FG256M fits avionics interface cards and defense subsystems where configuration security is essential: antifuse programming cannot be read back, protecting proprietary logic. The M temperature/packaging grade supports extended-environment requirements common in these programs. Typical uses include MIL-STD-style parallel data bus interfaces, radar signal pre-processing glue logic, and redundancy/voting circuits, implemented in the 4,024-cell array with instant-on behavior that satisfies power-up determinism expectations in flight hardware. The one-time-programmable nature also prevents in-flight configuration upset compared with SRAM-based devices requiring configuration integrity monitoring.
Recommended
Legacy Design Sustainment and Obsolescence Bridging
Many mature products were designed around Actel SX-A FPGAs, and the A54SX72A-FG256M remains a production-supported device for sustaining those boards. Because the same 72K-gate die is offered in multiple package and speed suffixes (FG256, FGG256, FGG256I, 1FGG256, 2FGG256), procurement teams can bridge end-of-life packaging changes without PCB redesign - the 256-ball FBGA footprint is shared across the family. Its instant-on antifuse behavior also preserves the power-up timing assumptions of legacy designs that predate configuration-time-tolerant SRAM FPGA architectures, making it a low-risk replenishment part.
Recommended
Single-Chip Logic Integration / Cost Reduction
Microchip positions SX-A devices for system-wide savings by integrating multiple discrete logic functions - PAL/GAL replacements, address decoders, bus transceivers' control logic, and counters - into one low-cost single-chip solution. A typical design replaces several 74-series devices with the A54SX72A-FG256M's 4,024 cells, cutting BOM line items, board area, and assembly cost. The 2.5V core with 203 I/O supports mixed 3.3V-interface systems, and the 217 MHz performance ceiling exceeds most glue-logic timing requirements. Instant power-up operation means the integrated logic behaves identically to the discrete devices it replaces.
Recommended
Test and Measurement Instrumentation
Bench and rack instrumentation benefit from the A54SX72A-FG256M as timing-generator, trigger-logic, and bus-interface fabric. The deterministic antifuse fabric guarantees identical timing behavior from the first power cycle - valuable for calibration stability across instruments - while 4,024 cells handle trigger state machines, prescalers, and formatter logic, and the 217 MHz family toggle rate supports high-resolution timing generation. The 256-ball FBGA's 203 I/O connect to front-end ADC/DAC buses and rear-panel communication ports. Its low static 2.5V power helps meet instrument thermal and fan-noise targets in dense chassis.
Recommended
Recommended Products Summary
Engineering reference data for A54SX72A-FG256M — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX72A-FG256 | A54SX72A-FGG256I | A54SX72A-2FGG256 |
|---|---|---|---|---|
| Package | 256-Ball FBGA (FG256) | 256-Ball FBGA - same | 256-Ball FBGA - same | 256-Ball FBGA - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Logic Gates | 72,000 | 72,000 | 72,000 | 72,000 |
| System Gates | 108,000 | 108,000 | 108,000 | 108,000 |
| Logic Cells | 4,024 | 4,024 | 4,024 | 4,024 |
| User I/O | 203 | 203 | 203 | 203 |
| Core Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Temperature Grade | M grade (see ordering code) | Commercial | Industrial | Commercial (per suffix) |
| Speed Grade | Standard | Standard | Standard | Speed 2 (faster) |
Key Differentiators
- Instant-on antifuse configuration (vs SRAM FPGAs (e.g., Xilinx Spartan class))
- Configuration security by physics (vs A54SX72A-FGG256I)
- Faster timing option within same footprint (vs A54SX72A-2FGG256)
Design Notes
The A54SX72A-FG256M is one-time programmable (antifuse). Unlike SRAM FPGAs, a design error discovered after programming cannot be corrected in-circuit - the device must be discarded. Complete gate-level simulation, static timing analysis, and I/O assignment verification in Microchip Libero/Designer before releasing devices to programming. Maintain a programmed-device reserve of at least 5-10% for engineering changes in long-life programs.
The device operates from a single 2.5V core supply per the SX-A family data. Decouple each supply pin pair with 0.1 uF ceramic capacitors placed within 2 mm of the ball via, plus bulk 10 uF per power domain. Verify I/O bank voltage requirements for the 203 user I/O against your interface standards, and confirm power-up ramp requirements in the SX-A datasheet, since antifuse devices have different sequencing sensitivities than SRAM FPGAs.
Use the dedicated CLKA/CLKB global clock networks for high-fanout clocks and quadrant clocks (QCLK) for localized domains, as documented in Microchip's quadrant clock application notes for the A54SX72A and RT54SX72S. Avoid routing clocks through general fabric, which increases skew and jitter. For the 256-ball FBGA, keep high-speed I/O on balls adjacent to ground returns and simulate flight times for interfaces above 50 MHz.
Compliance Information
Compliance data was not published in the verified web data for this MPN. The FGG package variants are Microchip's lead-free/green options; verify RoHS status of the FG256M suffix specifically with Microchip or the distributor before ordering.
