A54SX72A-2FG256 - 108K-Gate Antifuse FPGA 256-BGA | Microchip
MPN: A54SX72A-2FG256 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $138.5 | $138.50 |
| 10 | $128 | $1,280.00 |
| 100 | $115.2 | $11,520.00 |
| 500 | $104.8 | $52,400.00 |
| 1,000 | $96.5 | $96,500.00 |
Drop-in alternatives for A54SX72A-2FG256 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX72A-2FG256I
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$198 / Unit
View Datasheet →A54SX72A-2FGG256
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$217.72 / Unit
View Datasheet →A54SX72A-2FGG256I
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$79.4 / Unit
View Datasheet →A54SX72A-1FGG256
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View Datasheet →A54SX72A-FGG256M
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$136 / Unit
View Datasheet →A54SX72A-1FG256
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View Datasheet →A54SX72A-2FG256 Maximum Ratings & Electrical Characteristics
| Family | SX-A (Actel/Microsemi antifuse FPGA) |
| System Gates | 108000 gates (72000 typical) |
| Logic Cells (CLBs) | 6036 |
| User I/O | 203 |
| Maximum Toggle Rate | 294 MHz |
| Speed Grade | -2 |
| Core Supply Voltage | 2.5 V |
| I/O Supply Voltages Supported | 2.5 V, 3.3 V, 5 V |
| Technology | 0.22 um / 0.25 um CMOS antifuse |
| Programmability | One-Time Programmable (antifuse), non-volatile |
| Package | 256-Ball FBGA (FG256) |
| Mounting Type | Surface Mount |
| Configuration Device Required | No (non-volatile antifuse) |
| Packaging | Tray |
A54SX72A-2FG256 256-ball fbga (fg256) Pin Configuration Guide
Complete pinout information for A54SX72A-2FG256 (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-2FG256.
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-2FG256 is suitable for 6 applications: Industrial Control and Automation, Aerospace and Defense Logic, Communications and Networking Equipment, Glue Logic and Bus Bridging, Medical Equipment Control Logic, Test and Measurement Instrumentation.
Industrial Control and Automation
The A54SX72A-2FG256 fits industrial control systems that need deterministic, instantly-on logic without configuration boot time. Its non-volatile antifuse fabric begins operating at power-up, eliminating the configuration delay SRAM FPGAs impose on safety interlocks and machine sequencing. With 108K system gates and 203 user I/Os, one device can absorb address decoders, motor-control state machines, and parallel bus interfaces previously spread across several CPLDs and glue chips, cutting BOM cost. Support for 5V and 3.3V I/O standards lets it talk directly to legacy PLC-level TTL signals. The trade-off is one-time programmability: firmware fixes require re-sculpting new devices, so keep programmed spares in the maintenance inventory.
Recommended
Aerospace and Defense Logic
Antifuse FPGAs have long served aerospace and defense programs because their programmed interconnect cannot be read back, providing inherent design security, and because the non-volatile fabric tolerates harsh power environments without configuration storage. The A54SX72A supplies 72,000 typical gates for telemetry formatting, bus bridging, and command-decode functions on flight hardware, with the M-suffix flow variant (A54SX72A-FGG256M) available for programs needing additional screening. The 294 MHz toggle capability covers most legacy MIL-STD bus and payload interface timing. Designers should note that while the family has space heritage, mission-critical designs should verify screening flow and radiation data directly with Microchip before qualification.
Recommended
Communications and Networking Equipment
In telecom and datacom line cards, the A54SX72A-2FG256 integrates framing logic, clock-domain bridging, and backplane interfaces that previously consumed multiple ASSPs. The -2 speed grade's 294 MHz toggle rate supports pipelined SONET/SDH-overhead-style processing and parallel PHY interfacing, while 203 I/Os address wide parallel backplanes in 3.3V LVTTL/LVCMOS. Because the antifuse fabric draws low static current and produces no configuration-cycle transients, it suits always-on equipment where uptime and power budget matter. The one-time-programmable nature suits protocol-stable deployments; volatile-feature development is better served by SRAM FPGA families.
Recommended
Glue Logic and Bus Bridging
A classic SX-A use case is collapsing mixed 5V/3.3V glue logic - address decoders, wait-state generators, interrupt controllers, and bus transceivers - into one 108K-gate chip. The A54SX72A-2FG256's support for 2.5V, 3.3V, and 5V I/O standards removes level-shifter rows from the board, and its instant-on behavior means the bridge is active before the host CPU completes reset, which SRAM FPGAs cannot guarantee. Six thousand logic cells comfortably absorb 32-bit bus arbiters and memory controllers. The 256-FBGA footprint minimizes board area compared with the PQ208 QFP alternative, at the cost of more demanding BGA assembly and rework equipment.
Recommended
Medical Equipment Control Logic
Medical diagnostic and monitoring platforms benefit from the A54SX72A-2FG256's deterministic power-up: sensor interface sequencing and safety interlock logic are live the instant power is applied, with no bitstream-load window in which outputs float. The 72,000 typical gates absorb front-end timing controllers, filter-sequencing logic, and host interface bridges, while low static power suits benchtop instruments with standby requirements. The FG256 FBGA conserves board area in compact patient-side modules. For designs subject to design-history-file traceability, the fixed one-time-programmable netlist simplifies change control because the implemented logic cannot silently drift between units.
Recommended
Test and Measurement Instrumentation
Test instruments use the A54SX72A-2FG256 for timing generators, trigger logic, and instrument bus (GPIB/USB-bridge) interfacing, where the 294 MHz toggle rate and fast carry-chain arithmetic support precise edge placement and counter functions across 203 I/O pins. Non-volatile antifuse configuration means the instrument's front-panel logic is functional immediately at power-up - important for calibration sequences - and the device contributes low static power in battery-powered portable instruments. Because instrument firmware often evolves, teams should weigh the OTP constraint: prototype on PQ208 QFP variants for easy swap, then commit to the FG256 BGA for production density.
Recommended
Recommended Products Summary
Engineering reference data for A54SX72A-2FG256 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX72A-2FG256I | A54SX72A-2FGG256I | A54SX72A-1FGG256 | A54SX72A-2PQG208 |
|---|---|---|---|---|---|
| Package | 256-Ball FBGA (FG256) | 256-Ball FBGA - same | 256-Ball FBGA - same | 256-Ball FBGA - same | 208-Pin QFP - different footprint |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 108,000 (72,000 typical) | 108,000 | 108,000 | 108,000 | 108,000 |
| User I/O | 203 | 203 | 203 | 203 | [DATA_NEEDED] |
| Speed Grade / Max Toggle Rate | -2 / 294 MHz | -2 / 294 MHz | -2 / 294 MHz | -1 / lower (within 30%) | -2 / 294 MHz |
| Temperature Range | Commercial | Industrial | Industrial | Commercial | Commercial |
| Core / I/O Voltage | 2.5 V core; 2.5/3.3/5 V I/O | 2.5 V core; 2.5/3.3/5 V I/O | 2.5 V core; 2.5/3.3/5 V I/O | 2.5 V core; 2.5/3.3/5 V I/O | 2.5 V core; 2.5/3.3/5 V I/O |
| Configuration Device Required | No (antifuse OTP) | No | No | No | No |
Key Differentiators
- Non-volatile antifuse fabric - no configuration PROM needed (vs SRAM-based FPGAs (e.g., Xilinx/Intel families))
- Multi-voltage I/O flexibility on legacy systems (vs A54SX72A-2PQG208 (same die))
- Temperature-range upgrade path without redesign (vs A54SX72A-2FG256I)
- Trade-off: one-time programmability limits iteration (vs Field-updateable SRAM FPGA families)
Design Notes
The A54SX72A-2FG256 is one-time programmable: once sculpted, the antifuse interconnect cannot be erased or updated. Complete full functional and timing simulation in the Microchip Libero (Actel Designer) flow, sign off timing across all corners, and freeze the netlist before programming. Prototype on the QFP-packaged A54SX72A-2PQ208 variant where possible, since removing a sculpted 256-FBGA from a production board requires BGA rework equipment and destroys the device.
Power the 2.5V core from a clean, sequenced rail and provide separate decoupling per the SX-A datasheet power distribution guidance; I/O banks should be decoupled with bulk plus 0.1 uF ceramic capacitors at each supply ball. Because antifuse fabric has no configuration SRAM, inrush is modest and the device is active immediately at power-up - useful for systems that must drive outputs during processor reset. Estimated: bulk capacitance sizing should follow total I/O switching current rather than the fixed core current, which is the dominant static term in this family.
The 256-ball FBGA (FG256) uses a fine ball pitch that requires a minimum 4-layer board with via-in-pad or dog-bone escape fanout on the perimeter rows; plan inner-layer escape routing for the center balls before placement. Follow Microchip/Actel package mechanical drawings for pad geometry and solder-mask definition. If BGA assembly is unavailable in-house, the PQG208 QFP variants provide the same die with hand-assemblable leads for prototypes.
With 203 user I/Os supporting 5V TTL signaling, simultaneously switching outputs on wide parallel buses can induce ground bounce. Distribute ground balls per the datasheet ballout, limit the number of outputs switching in the same time window in high-drive settings, and keep stub lengths short on 5V legacy buses. Series termination resistors (22-33 ohm) on fast edges leaving the FBGA are a low-cost mitigation for reflections on long traces.
Compliance Information
The retrieved distributor data does not state RoHS/REACH/lead-free status for the non-G A54SX72A-2FG256. The FGG (green) suffix variants in the same family are the RoHS-focused packaging options. Request a certificate of conformance from Microchip or the distributor for verified compliance documentation.
