A54SX72A-2FGG256I - 108K-Gate Antifuse FPGA 256-BGA | Microchip
MPN: A54SX72A-2FGG256I ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $118.5 | $118.50 |
| 10 | $106.65 | $1,066.50 |
| 100 | $94.8 | $9,480.00 |
| 500 | $87.1 | $43,550.00 |
| 1,000 | $79.4 | $79,400.00 |
Drop-in alternatives for A54SX72A-2FGG256I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX72A-2FGG256
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View Datasheet →A54SX72A-2FGG256I Maximum Ratings & Electrical Characteristics
| Family | SX-A (Actel/Microsemi antifuse FPGA) |
| System Gates | 108,000 typical (72,000 nominal) |
| Logic Cells | 4,024 |
| Number of I/O | 203 |
| Speed Grade | -2 (fastest commercial) |
| Maximum Toggle Frequency | 294 MHz |
| Core Supply Voltage | 2.5 V |
| Process Technology | 0.25 um CMOS antifuse |
| Programming Type | One-Time Programmable (OTP) antifuse |
| Configuration Storage | Non-volatile (no external boot PROM) |
| Package | 256-ball FBGA (17x17 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| Clock Networks | CLKA, CLKB, quadrant clocks (QCLK) |
| Packaging | Tray |
| RoHS Status | Compliant (lead-free version per distributor listing) |
A54SX72A-2FGG256I 256-ball fbga (17x17 mm) Pin Configuration Guide
Complete pinout information for A54SX72A-2FGG256I (256-ball fbga (17x17 mm) 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-2FGG256I.
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-2FGG256I is suitable for 6 applications: Industrial Control and Automation, Defense and Secure Logic, Communications and Networking Line Cards, Single-Chip Function Integration / BOM Cost Reduction, Test and Measurement Equipment, Legacy System Sustainment and Obsolescence Management.
Industrial Control and Automation
The A54SX72A-2FGG256I consolidates glue logic, address decoding, state machines, and bus interfacing into one 108K-gate antifuse FPGA in industrial -40C to +85C rating. Its 203 user I/Os interface PLC backplanes, motor-control encoders, and sensor banks, while the 2.5 V core keeps static power low in always-on factory equipment. Because configuration is one-time-programmable and stored on-chip, the FPGA is instantly active at power-up with no boot PROM latency, which matters for deterministic machinery startup. Place it between a 3.3 V microcontroller and legacy 5 V-tolerant field signaling with appropriate level translation; the 294 MHz toggle capability of the -2 speed grade far exceeds typical industrial timing needs, giving wide design margin.
Recommended
Defense and Secure Logic
Antifuse configuration is the core reason the A54SX72A-2FGG256I fits defense and secure-system designs: the programmed bitstream cannot be read back, so reverse engineering the logic requires physical decapping, and there is no external configuration flash to intercept. The industrial -40C to +85C rating covers ruggedized ground-based defense electronics, while the same die is offered in radiation-tolerant RT54SX72S form for space programs. With 108K system gates the device implements encryption helpers, bus protocol bridges (MIL-STD-1553 companion logic, custom interfaces), and secure boot support logic. Designers should run full timing simulation of security-critical paths and lock programming files under configuration control, since OTP parts cannot be reprogrammed after field programming.
Recommended
Communications and Networking Line Cards
In telecom and networking line cards, the A54SX72A-2FGG256I implements framing, multiplexing, backplane interfacing, and control-plane glue logic at line rates well within its 294 MHz toggle capability. The 203 I/Os connect SONET/SDH framers, PHYs, and backplane connectors, while dedicated CLKA, CLKB, and quadrant clock (QCLK) networks keep synchronous domains clean across the 256-ball FBGA. The antifuse interconnect provides consistent, low-capacitance routing that simplifies timing closure for high-speed paths, and single 2.5 V operation reduces rail count. Use the -2 speed grade version, as in this MPN, when retiming or high fan-out clocking consumes timing budget in the -1 parts.
Recommended
Single-Chip Function Integration / BOM Cost Reduction
Microchip positions the SX-A family explicitly for system-wide savings by integrating multiple ASSPs, PALs, GALs, and discrete glue logic into one low-cost, single-chip solution. Replacing 10-30 small logic devices with one A54SX72A-2FGG256I cuts board area, reduces assembly cost, removes multiple reprogramming/obsolescence risks, and eliminates configuration-PROM inventory because antifuse programming is internal and permanent. With 108K typical system gates and 4,024 modules, a full integration pass typically leaves headroom for future feature additions. The 17x17 mm 256-ball FBGA fits standard SMT assembly. Budget engineering effort for thorough pre-programming verification, since OTP silicon cannot be reworked after field programming.
Recommended
Test and Measurement Equipment
Bench instruments, ATE load boards, and protocol analyzers benefit from the A54SX72A-2FGG256I's combination of 203 I/Os, deterministic timing, and no-boot-startup behavior. On ATE interface boards the FPGA provides channel steering, trigger logic, and pattern generation, with the -2 speed grade's 294 MHz toggle rate supporting fast clock domains. Because the antifuse design never reloads configuration, measurement equipment reaches an operational state immediately after power application, removing boot-time variability from test sequences. The industrial temperature rating also tolerates heated instrument enclosures. Designers should plan I/O standards and termination on the 2.5 V-compatible banks early, since OTP programming fixes the I/O configuration permanently.
Recommended
Legacy System Sustainment and Obsolescence Management
For programs sustaining legacy Actel/Microsemi-based designs, the A54SX72A-2FGG256I is the current Microchip-branded continuation of the original A54SX72A silicon, keeping long-lifecycle systems (avionics ground support, medical equipment, industrial plants) maintainable. Because the die and 256-FBGA footprint are unchanged from the original Actel release, existing programming files and Libero/Designer project archives map directly onto new-build boards, and the lead-free FGG256I version supports modern RoHS assembly lines replacing leaded FG256 predecessors. XAIPART stocks multiple speed grades and temperature variants, letting sustainment engineers trade timing margin against availability during allocation cycles without PCB changes.
Recommended
Recommended Products Summary
Engineering reference data for A54SX72A-2FGG256I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX72A-2FGG256 | A54SX72A-1FGG256I | A54SX72A-FFG256 | A54SX72A-FGG256I |
|---|---|---|---|---|---|
| Package | 256-FBGA (FGG256, 17x17 mm) | 256-FBGA - same | 256-FBGA - same | 256-FBGA (FG256) - same ball count | 256-FBGA - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 108K typical | 108K typical | 108K typical | 108K typical | 108K typical |
| Speed Grade | -2 (up to 294 MHz toggle) | -2 (up to 294 MHz) | -1 (slower) | standard (slower) | standard (slower) |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| User I/O | 203 | 203 | 203 | 203 | 203 |
| Core Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Ball Metallurgy | Lead-free (FGG) | Lead-free (FGG) | Lead-free (FGG) | Legacy leaded (FG) | Lead-free (FGG) |
Key Differentiators
- Fastest SX-A speed grade available (vs A54SX72A-1FGG256I)
- Industrial temperature rating (vs A54SX72A-2FGG256)
- Lead-free RoHS-compatible assembly (vs A54SX72A-FFG256)
- Largest SX-A density in this package (vs A54SX32A-2FGG256I)
Design Notes
The 256-ball FBGA (17x17 mm, 1.0 mm ball pitch per Utmel listing) requires a fanout region of roughly 10x10 vias; use via-in-pad or dog-bone fanout with 0.3 mm drills. Target 4+ layer stackup with dedicated 2.5 V core and ground planes, since 203 I/Os plus core current concentrate in the center ball region. Follow the SX-A datasheet power-ball assignment and place bulk 10-47 uF plus local 0.1 uF decoupling on each supply ball cluster. Verify BGA reflow profile against lead-free (FGG) ball metallurgy, typically SAC alloys requiring peak temperatures near 245C.
Antifuse FPGAs are one-time programmable: after programming, the A54SX72A-2FGG256I cannot be erased or updated. Complete gate-level timing simulation, verify I/O assignments against the FGG256 ball map in Libero/Designer, and confirm speed-grade selection before releasing the programming file. A -2 timing-signed-off design can safely move to slower bins only with re-closure. Also remember there is no configuration readback or rework path; keep programming files and checksums under revision control for field-service replacement parts.
Estimated: SX-A antifuse devices draw low static power since no configuration SRAM exists; dynamic power dominates and scales with toggle rate, I/O count, and load capacitance per the SX-A datasheet power equations. For a fully utilized 108K-gate design toggling at moderate rates, budget the 2.5 V rail with margin and compute dynamic current using Microchip's Designer power calculator with your actual net switching activity rather than worst-case assumptions. Provide adequate plane copper and decoupling near VCCA/VCCI balls to prevent rail droop during simultaneous switching of the 203 I/Os.
Compliance Information
Distributor listings (PCB Electronics Supply Chain, DigiKey, Mouser) identify A54SX72A-2FGG256I as lead-free/RoHS compliant. REACH, halogen-free, and conflict-minerals status not stated in provided data - confirm on Microchip environmental pages.
