A54SX72A-2FG256 - 108K-Gate Antifuse FPGA 256-BGA | Microchip
MPN： A54SX72A-2FG256 ✓ 啟用中A54SX72A-2FG256 概覽
An antifuse FPGA is a one-time-programmable (OTP) programmable logic device in which permanent interconnects are formed at programming time. Unlike SRAM-based FPGAs, antifuse devices are non-volatile, require no configuration PROM, offer inherent resistance to bit-stream readback attacks, and exhibit low static power. Within the programmable logic hierarchy, the A54SX72A belongs to the SX-A family -> antifuse FPGA -> field programmable gate array -> programmable logic IC.
Key features include single-chip integration (no external boot device), support for 2.5V, 3.3V, and 5V I/O standards on a 2.5V core, and fabrication on 0.22/0.25 um CMOS antifuse technology. The -2 speed grade balances performance and cost, and the 256-FBGA (17 mm x 17 mm, 1.0 mm ball pitch per distributor listings for the package family) saves board area versus the PQ208 alternatives.
The SX-A architecture uses a sea-of-modules fabric with fast carry logic and dedicated flip-flops per cell, enabling pipelined datapaths and state machines at clock rates approaching the datasheet 294 MHz toggle figure. Programming is performed via Microchip (Actel) Silicon Sculptor hardware after board assembly, which makes the device well suited to fixed-configuration, cost-sensitive production designs.
Typical applications include industrial control, glue logic integration, bus interface bridging, communications equipment, and military/aerospace systems that value the radiation-tolerant heritage and non-volatile security of antifuse technology.
Design consideration: because the device is one-time programmable, freeze the netlist and verify timing in simulation before committing silicon; budget for rework if late design changes are likely. Pricing on this page reflects typical distributor levels as of 2026-09-03.
This page synthesizes drop-in same-package alternatives, pricing tiers, FAQs, and practical design notes not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 A54SX72A-2FG256 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： A54SX72A-2FG256 （相同外形與佔位） — 差異在於 Package, System Gates, Typical Gates, Process Technology, RoHS Status.
A54SX72A-2FG256I
✅ 直接替換聯絡詢價
查看資料表 →A54SX72A-2FGG256
✅ 直接替換聯絡詢價
查看資料表 →A54SX72A-2FGG256I
✅ 直接替換聯絡詢價
查看資料表 →A54SX72A-1FGG256
✅ 直接替換聯絡詢價
查看資料表 →A54SX72A-FGG256M
✅ 直接替換聯絡詢價
查看資料表 →A54SX72A-1FG256
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →A54SX72A-2FG256 最大額定值與電氣特性
| 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 |
| 封裝 | 256-Ball FBGA (FG256) |
| 安裝類型 | Surface Mount |
| Configuration Device Required | No (non-volatile antifuse) |
| Packaging | Tray |
A54SX72A-2FG256 256-ball fbga (fg256) 腳位配置指南
A54SX72A-2FG256（256-ball fbga (fg256) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： A54SX72A-2FG256.
請參閱 資料表 以查看完整腳位配置。
典型應用
A54SX72A-2FG256 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 A54SX72A-2FG256 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
| 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 |
主要差異化特點
- Non-volatile antifuse fabric - no configuration PROM needed (對比SRAM-based FPGAs (e.g., Xilinx/Intel families))
- Multi-voltage I/O flexibility on legacy systems (對比A54SX72A-2PQG208 (same die))
- Temperature-range upgrade path without redesign (對比A54SX72A-2FG256I)
- Trade-off: one-time programmability limits iteration (對比Field-updateable SRAM FPGA families)
設計說明
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.
合規資訊
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.
