A54SX16-PQG208I - SX FPGA 16K Gates 175 I/O | Microsemi
MPN： A54SX16-PQG208I ✓ 啟用中A54SX16-PQG208I 概覽
A Field-Programmable Gate Array (FPGA) is a semiconductor device containing a matrix of configurable logic blocks and programmable interconnects that designers configure after manufacturing. Within the FPGA hierarchy, the SX family is a one-time-programmable antifuse FPGA, sitting under the broader programmable logic category alongside SRAM-based and flash-based FPGAs. Antifuse technology means the configuration is permanent and non-volatile, and is locked in at programming time.
Key features of the A54SX16-PQG208I include dual-rail operation at 3.3V or 5.0V (3.0V to 3.6V and 4.75V to 5.25V supply ranges), 0.35 um CMOS antifuse technology, and 240 MHz toggle performance. The 175 available I/O comfortably exceeds typical glue-logic needs, and the industrial 'I' suffix rating supports harsh-environment deployments.
Technically, the SX family uses the Actel-heritage antifuse architecture: a sea of logic modules (combinatorial and sequential cells) connected via a routing fabric programmed by low-resistance antifuse links. Because configuration is hard-wired, the device needs no configuration PROM or boot time, offers inherent resistance to configuration readback (design security), and avoids the soft-error configuration-upset issues of SRAM FPGAs. Trade-offs include one-time programmability, so design changes require a new device.
Typical applications include industrial control and automation backplanes, 5V-legacy system bridge logic, communications line cards, military/aerospace upgrades of legacy designs, and bus-interface bridging where SRAM FPGA configuration volatility is unacceptable.
Design consideration: because the device is antifuse one-time-programmable, fully verify your design in simulation and use the manufacturer Libero/Designer flow before committing to programming; the 5V I/O option should be exploited to interface legacy TTL-level buses without level shifters.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 A54SX16-PQG208I — 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： A54SX16-PQG208I （相同外形與佔位） — 差異在於 Family, Package, System Gates, Operating Temperature, Process Technology.
A54SX16-2PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX16-1PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX16-2PQG208
✅ 直接替換聯絡詢價
查看資料表 →A54SX16-PQG208
✅ 直接替換聯絡詢價
查看資料表 →A54SX16A-2PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX16P-PQG208I
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查看資料表 →A54SX16-PQG208I 最大額定值與電氣特性
| Family | SX (Actel/Microsemi SX antifuse FPGA) |
| System Gates | 16K |
| Logic Cells | 924 |
| User I/O | 175 |
| Maximum Toggle Frequency | 240 MHz |
| Process Technology | 0.35 um CMOS antifuse |
| Supply Voltage (Core) | 3.0 V to 3.6 V |
| Supply Voltage (5V mode) | 4.75 V to 5.25 V |
| 工作溫度 | -40C to +85C (industrial) |
| 封裝 | 208-BFQFP (28x28 mm) |
| 安裝類型 | Surface Mount |
| Programmability | One-time programmable (antifuse), non-volatile |
| Speed Grade | Standard (-) |
A54SX16-PQG208I 208-bfqfp (28x28 mm) 腳位配置指南
A54SX16-PQG208I（208-bfqfp (28x28 mm) 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： A54SX16-PQG208I.
請參閱 資料表 以查看完整腳位配置。
典型應用
A54SX16-PQG208I 適用於 6 應用s: Industrial Control and Automation Backplanes, Legacy 5V System Bridge Logic, Military and Aerospace Legacy Upgrades, Communications Line Cards, Test and Measurement Instrument Interface, Embedded Coprocessor and State-Machine Offload.
Industrial Control and Automation Backplanes
The A54SX16-PQG208I fits industrial PLC and backplane control logic because its dual 3.3V/5V supply modes (3.0-3.6V and 4.75-5.25V) let it sit directly on legacy 5V industrial buses without level shifters, while the industrial -40C to +85C rating covers unconditioned factory floors and outdoor cabinets. With 175 user I/O and 924 logic cells, it absorbs address decoding, interrupt aggregation, and bus arbitration that would otherwise need several PAL/GAL devices. Because the antifuse configuration is non-volatile and immune to configuration upset, the controller powers up functional within microseconds with no boot PROM - a key reliability attribute for equipment that must never fail to start. Budget roughly one device instead of 5-10 discrete logic ICs, cutting board area in the 28x28 mm 208-BFQFP footprint.
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Legacy 5V System Bridge Logic
Systems still built around 5V TTL buses - military spares, test equipment, railway signaling, and legacy communications racks - need bridge logic that speaks 5V natively. The A54SX16-PQG208I accepts a 4.75V-5.25V supply per its published specifications, so its I/O drive and thresholds match 5V TTL directly, unlike modern 3.3V-only FPGAs that require bus switches or level translators. Its 240 MHz toggle capability comfortably covers bus timing for VME-style and ISA-era interfaces. The one-time-programmable antifuse fabric also prevents field tampering of the bridge function, useful in certified or export-controlled systems. Designers should reserve a few of the 175 I/O for JTAG-boundary test access and verify I/O standard assignments in the Microsemi Designer tool before programming, since antifuse changes require new silicon.
推薦
Military and Aerospace Legacy Upgrades
Defense depots and aerospace MRO shops frequently must resupply 1980s-1990s programmable logic in obsolete packages. The A54SX16-PQG208I, in the industrial -I temperature grade, is a common consolidation target: it replaces multiple GAL/PAL/22V10 sockets with a single 208-pin device while retaining 5V-tolerant, wide-temperature behavior. Antifuse immutability supports design-assurance arguments because the configured netlist cannot be altered or read back in the field, aiding configuration control and anti-tamper requirements. The 0.35 um process is radiation-tolerant by virtue of its simplicity compared to deep-submicron SRAM fabrics, though this standard-grade part is not the RadHard RTAX line - use RTAX parts for genuine radiation environments. Verify program data retention against the SX-A datasheet reliability section for long-mission profiles.
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Communications Line Cards
Telecom and datacom line cards built in the 5V era used Actel SX FPGAs for framing, multiplexing, and backplane interface glue. The A54SX16-PQG208I provides 16K gates and 240 MHz toggle speed, sufficient for E1/T1 framing, HDLC CRC engines, and backplane retry logic at these data rates. The 175 I/O cover dense connector pinouts of 208-position line-card edges without external fanout logic. Because it powers up instantly from antifuse configuration, line cards return to service immediately after hot-swap or watchdog reset - an operational advantage over SRAM FPGAs that spend milliseconds loading bitstreams. Designers should manage the dual-supply requirement carefully: when running the card at 3.3V only, the 3.0-3.6V rail range applies and 5V buses must not be connected without verification of I/O tolerance in the datasheet electrical chapter.
推薦
Test and Measurement Instrument Interface
Bench instruments and rack systems from the 5V generation benefit from the A54SX16-PQG208I as a replacement or new-build interface controller: 175 I/O terminate GPIB-style connectors, relay matrices, and front-panel keypads, while the 924 cells implement state machines, trigger generation, and counters at up to 240 MHz. The industrial temperature rating suits instruments used near heat-generating power supplies inside enclosures. The one-time-programmable fabric guarantees that a shipped calibration configuration cannot be accidentally reloaded or corrupted by a glitched configuration flash - important where measurement integrity is audited. During new design, allocate the four I/O banks to match the 208-BFQFP power-pin segmentation in the datasheet and add 100 nF decoupling per supply pin pair to contain simultaneous-switching noise on the analog measurement front end.
推薦
Embedded Coprocessor and State-Machine Offload
Where an 8-bit or 16-bit MCU needs a deterministic hardware accelerator, the A54SX16-PQG208I offloads functions such as CRC, PWM banks, encoder quadrature decoding, and fixed-latency sequencing. Its 924 antifuse cells implement hard-wired state machines with cycle-exact timing unachievable in software, and the 240 MHz toggle ceiling gives wide margin over typical MCU bus clocks. Instant-on behavior means the coprocessor is ready before the MCU finishes reset, so no firmware handshake delay exists at boot. The 3.3V core mode interfaces cleanly with modern microcontroller I/O, while retained 5V capability keeps older peripheral buses attachable. Since the part is one-time programmable, prototype the accelerator in the free Microsemi simulation flow and only commit silicon after register-transfer-level verification and static timing analysis pass with margin.
推薦
推薦產品摘要
工程參考資料，適用於 A54SX16-PQG208I — 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 | A54SX16-2PQG208I | A54SX16-1PQG208I | A54SX16-PQG208 | A54SX16A-2PQG208I | A54SX16P-PQG208I |
|---|---|---|---|---|---|---|
| Package | 208-BFQFP (28x28 mm) | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same |
| Brand | Microsemi | Microsemi | Microsemi | Microsemi | Microchip Technology | Microsemi |
| System Gates | 16K | 16K | 16K | 16K | 16K | 16K |
| Logic Cells | 924 | 924 | 924 | 924 | 924 | 924 |
| User I/O | 175 | 175 | 175 | 175 | 175 | 175 |
| Speed Grade | Standard | Dash-2 (faster) | Dash-1 (slower) | Standard | Dash-2 (SX-A, faster) | Standard |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | Commercial (0C to +70C) | -40C to +85C | -40C to +85C |
| Programming Technology | Antifuse, one-time programmable | Antifuse OTP | Antifuse OTP | Antifuse OTP | Antifuse OTP | Antifuse OTP |
主要差異化特點
- Dual 3.3V/5V supply capability (對比A54SX16P-PQG208I)
- Industrial temperature rating at standard speed grade price (對比A54SX16-PQG208)
- Cost advantage over faster speed grades (對比A54SX16-2PQG208I)
- Legacy architecture match vs modern SRAM FPGAs (對比A54SX16A-2PQG208I)
設計說明
The A54SX16-PQG208I is one-time programmable: antifuse links are burned permanently at programming and cannot be reworked. Complete RTL simulation, static timing analysis, and pin-assignment review in the Microsemi Libero/Designer flow before releasing any device to the Silicon Sculptor programmer. Order one engineering lot rather than production volume until first-article units are validated in-system, since a pinout or timing mistake in the programmed netlist scrapes every fused device.
This part supports two supply modes: 3.0-3.6V and 4.75-5.25V per distributor specifications. Select one mode at board design time and do not hot-connect a 5V bus to a board powered at 3.3V without verifying I/O tolerance in the SX-A datasheet electrical chapter. Decouple every VDD pin pair of the 208-BFQFP with 100 nF ceramic capacitors placed within 3 mm of the pin, plus bulk 10 uF per supply rail, to control simultaneous-switching noise across the 175 user I/O.
The 208-BFQFP has a 0.5 mm-class fine pitch at 28x28 mm body size; specify a solder-mask-defined land pattern per the datasheet package drawing and use a no-clean or water-wash process compatible with fine-pitch QFP reflow. Add fiducials at two diagonal corners for optical alignment, and reserve test access to at least 10% of unused I/O for boundary-scan-based manufacturing test, since antifuse devices cannot be probed internally after programming.
Estimated: with core current typically in the tens-of-mA range for a 16K-gate antifuse design at 5V worst case, power dissipation stays well under 1 W for typical glue-logic usage, and the large 208-BFQFP body with its exposed leadframe dissipates this without a heatsink. Confirm with your design's actual switching activity using the Microsemi power calculator; for heavily toggled designs at 5V, verify junction temperature stays below the datasheet maximum using theta-JA from the SX-A datasheet thermal table.
合規資訊
RoHS and lead-free status were not stated in the retrieved distributor data for this legacy Actel/Microsemi ordering code; confirm via the Microchip product page or certificate of conformity. Not an automotive AEC-Q100 part.
