A54SX32-TQ176 - 32K-Gate SX FPGA, TQFP-176 | Microchip
MPN： A54SX32-TQ176 ✗ 停產A54SX32-TQ176 概覽
An FPGA (Field-Programmable Gate Array) is a semiconductor device containing a fabric of programmable logic blocks and interconnects that engineers configure after manufacturing, sitting in the hierarchy of programmable logic below full-custom ASICs and above fixed-function logic ICs. The SX family differs from SRAM-based FPGAs because it uses antifuse programming elements: the configuration is one-time programmable (OTP), non-volatile, and inherently immune to configuration-readout attacks and radiation-induced configuration upsets.
Key features of the A54SX32 include a sea-of-modules architecture with 2880 logic modules, dual-voltage operation (3.3 V core, 5 V-tolerant I/O), and deterministic interconnect that delivers ASIC-like timing predictability. According to the Microchip SX family datasheet, the family was designed for performance-intensive applications requiring dramatic reductions in power consumption compared with SRAM FPGAs.
Technically, the 0.35 um antifuse process provides low routing capacitance, which is the root cause of the SX family's speed advantage: signals travel through fewer buffered segments, so critical paths see lower delay and jitter. The OTP nature also removes the configuration PROM and power-up configuration time required by SRAM FPGAs, improving system boot behavior andglitch resistance.
Typical applications include telecommunications and networking line cards, industrial control, aerospace and defense payloads, and test equipment glue-logic consolidation, where the combination of 32K gates, 147 I/Os, and 5 V-tolerant I/O matches legacy board designs.
A critical design consideration is that this commercial-temperature (0 to 70 C) leaded part is obsolete and RoHS non-compliant; new designs should use the green A54SX32-TQG176 variants or plan a lifecycle strategy.
This page synthesizes distributor availability, same-family drop-in variants, and obsolescence guidance not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 A54SX32-TQ176 — 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： A54SX32-TQ176 （相同外形與佔位） — 差異在於 Family, Process Technology, System Gates, Package, Operating Temperature.
A54SX32-TQG176
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-TQG176I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-TQ176I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-1TQG176
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →A54SX32-2TQG176
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →A54SX32-2TQG176I
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →A54SX32-TQ176M
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-TQ176 最大額定值與電氣特性
| System Gates | 32000 gates |
| Logic Cells | 1800 cells |
| Logic Modules (LABs) | 2880 |
| User I/O | 147 |
| Maximum Toggle Frequency | 240 MHz |
| Process Technology | 0.35 um |
| Core Supply Voltage | 3.0 V to 3.6 V |
| I/O Supply Voltage | 4.75 V to 5.25 V |
| Programming Technology | Antifuse (one-time programmable) |
| Family | Actel SX |
| 封裝 | 176-TQFP (24x24 mm) |
| 安裝類型 | Surface Mount (SMD/SMT) |
| 工作溫度 | 0 C to 70 C (TA) |
| Lead Free Status | Contains Lead |
| RoHS 狀態 | RoHS Non-Compliant |
| 生命週期狀態 | Obsolete (EOL) |
A54SX32-TQ176 176-tqfp (24x24 mm) 腳位配置指南
A54SX32-TQ176（176-tqfp (24x24 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： A54SX32-TQ176.
請參閱 資料表 以查看完整腳位配置。
典型應用
A54SX32-TQ176 適用於 6 應用s: Telecommunications Line Cards, Industrial Control and PLC I/O Modules, Aerospace and Defense Payload Electronics, Test and Measurement Instrumentation, Networking and Router Control-Plane Glue Logic, Medical Device Legacy Board Maintenance.
Telecommunications Line Cards
The A54SX32-TQ176 fits legacy telecom line-card designs where 5 V-tolerant I/O must directly drive and receive signals from TTL-era framers, T1/E1 line interfaces, and backplane buffers. Its 147 user I/Os consolidate glue logic that previously required multiple PAL/GAL devices, and the antifuse fabric delivers deterministic sub-nanosecond routing delays, enabling fixed setup/hold margins across production units. Because the device is one-time programmable and non-volatile, line cards boot instantly without configuration PROMs - important in carrier equipment with strict uptime requirements. The 240 MHz fabric ceiling comfortably covers E1/T1 (1.544/2.048 Mbps) and Sonet-overhead-rate logic. When servicing these boards today, the green A54SX32-TQG176 variant preserves the exact 176-TQFP footprint while meeting current Pb-free assembly profiles, since leaded TQ176 units cannot pass modern RoHS reflow requirements.
推薦
Industrial Control and PLC I/O Modules
Industrial I/O cards frequently combine 24 V-field-side buffering with 5 V logic-side interfaces, exactly matching the A54SX32-TQ176's dual-supply architecture: a 3.3 V core (3.0 V to 3.6 V) with 5 V I/O banks (4.75 V to 5.25 V). The 32K system gates and 2880 logic modules absorb counters, quadrature decoders, PWM generators, and interlock logic, while the antifuse technology ensures the configuration is immune to power glitches and cannot be corrupted by noisy industrial environments - a real failure mode for SRAM FPGAs lacking configuration error correction. The commercial 0 C to 70 C rating suits cabinet-mounted controllers; for floor-mounted or outdoor cabinets, select the industrial-grade A54SX32-TQG176I rated -40 C to +85 C, which is pin-to-pin compatible and requires no PCB change, only an updated procurement line and green reflow profile.
推薦
Aerospace and Defense Payload Electronics
The Actel SX family has a long heritage in aerospace and defense because antifuse FPGAs are inherently single-event-upset tolerant at the configuration layer: once programmed, the routing cannot flip state under radiation, unlike SRAM-based fabrics. The A54SX32-TQ176M is the military-screened version of this same die, sharing the identical 176-TQFP footprint and 147 user I/Os with the commercial TQ176. Typical payload uses include telemetry formatting, command decoders, and sensor-interface consolidation, where the 0.35 um process also offers better total-ionizing-dose tolerance than deep-submicron SRAM FPGAs. The one-time-programmable nature provides anti-tamper benefit by eliminating readable configuration streams. For new qualified designs, Microchip points engineers toward RTAX and RTG4 space families, but for heritage-platform spares and life-extension programs, the TQ176M remains the footprint-compatible sustainment option.
推薦
Test and Measurement Instrumentation
Bench instruments and ATE modules use the A54SX32-TQ176 for timing-state generation, trigger arbitration, and bus-interface bridging, exploiting its 240 MHz fabric speed and deterministic antifuse routing to produce repeatable channel-to-channel skew. The 5 V-tolerant I/O banks connect directly to legacy GPIB-adjacent and TTL trigger buses, while the 3.3 V core keeps dynamic power manageable inside enclosed instruments; the SX family's sea-of-modules architecture was explicitly positioned by Microchip for power-consumption reduction relative to SRAM FPGAs. Because the configuration is fixed at production, calibration-adjacent logic behaves identically across every unit, simplifying verification. For repair of instruments built before RoHS, the leaded TQ176 matches the original assembly; for rebuilt or green-compliant units, the A54SX32-TQG176 drop-in variant allows lead-free assembly on the same 176-TQFP land pattern without board respin.
推薦
Networking and Router Control-Plane Glue Logic
Legacy routers, switches, and media converters deployed the SX family to tie together MACs, PHYs, and management controllers, and the A54SX32-TQ176's 147 user I/Os plus 32K gates absorb address decoding, LED steering, MDIO masters, and packet-rate timers in one package. The 3.0 V to 3.6 V core aligns with common 3.3 V backplane rails, while the 4.75 V to 5.25 V I/O operation interfaces with older 5 V transceivers without external level translation. Instant-on antifuse configuration lets the management FPGA be alive before the main CPU boots, enabling early fault detection and watchdog supervision. The 176-TQFP 24x24 mm body keeps 0.5 mm-pitch assembly straightforward on standard SMT lines. Sustainment teams should qualify the RoHS-compliant A54SX32-TQG176 or industrial A54SX32-TQG176I as pin-compatible replacements as leaded TQ176 stock depletes.
推薦
Medical Device Legacy Board Maintenance
Hospital and laboratory equipment with long certification lifecycles - patient monitors, analyzer front-ends, and imaging control boards - often embed SX-family FPGAs, and field-service repairs must preserve the originally qualified design. The A54SX32-TQ176 supports this use directly: its one-time-programmable antifuse fabric cannot be altered after verification, giving quality systems configuration traceability that reprogrammable devices complicate. The 5 V-tolerant I/O matches the analog-front-end logic levels common in older medical hardware, and the 0 C to 70 C rating covers clinical room environments. Because the commercial TQ176 is leaded and obsolete, service organizations should purchase remaining qualified stock with date-code and authenticity documentation, or seek regulatory approval to substitute the electrically identical, RoHS-compliant A54SX32-TQG176, which shares the same 176-TQFP footprint, pinout, timing, and programming file.
推薦
推薦產品摘要
工程參考資料，適用於 A54SX32-TQ176 — 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 | A54SX32-TQG176 | A54SX32-TQG176I | A54SX32-TQ176I | A54SX32-TQ176M |
|---|---|---|---|---|---|
| Package | 176-TQFP (24x24 mm) | 176-TQFP (24x24 mm) - same | 176-TQFP (24x24 mm) - same | 176-TQFP (24x24 mm) - same | 176-TQFP (24x24 mm) - same |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 32000 | 32000 | 32000 | 32000 | 32000 |
| User I/O | 147 | 147 | 147 | 147 | 147 |
| Core Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Operating Temperature | 0 C to 70 C (commercial) | 0 C to 70 C | -40 C to +85 C | -40 C to +85 C | Military screening |
| RoHS / Lead Finish | Non-compliant, contains lead (SnPb) | RoHS compliant, lead-free | RoHS compliant, lead-free | Contains lead | Contains lead |
主要差異化特點
- RoHS-compliant drop-in availability (對比A54SX32-TQG176)
- Wider industrial temperature range (對比A54SX32-TQ176I / A54SX32-TQG176I)
- Configuration security and SEU immunity vs SRAM FPGAs (對比Comparable-capacity SRAM FPGAs (e.g., Xilinx Spartan class))
設計說明
The A54SX32 requires two supply domains: VCCA core at 3.0 V to 3.6 V and VCI I/O at 4.75 V to 5.25 V per the SX family datasheet. Decouple each VCCA/VCI pin pair with 0.1 uF ceramic capacitors placed within 2 mm of the pin, plus bulk 10 uF per rail. Antifuse FPGAs draw near-zero static current, so rail sizing is driven by dynamic I/O current: estimate I/O current as sum over outputs of (C_load x V x f_switching) and budget regulator headroom accordingly.
The 176-TQFP uses 0.5 mm lead pitch, so specify solder-mask-defined pads per IPC-7351 TQFP conventions and keep fan-out vias dogboned to avoid solder wicking. Because the leaded TQ176 and green TQG176 share the identical footprint, design the land pattern once for the green variant so Pb-free assembly is possible in future rebuilds. Do not connect unused I/O as inputs floating - tie or drive them per Libero place-and-route defaults to avoid floating-gate I/O latch-up risk.
Antifuse programming is permanent: a design error cannot be patched in the field, so run full timing simulation and boundary scan before committing devices to production programming on Silicon Sculptor/FSM programmers. Second pitfall: this commercial 0 C to 70 C part contains lead and is obsolete - using it in new RoHS-regulated products is prohibited in most markets. Third: avoid substituting TQ176 where the board reflow profile exceeds leaded-SnPb temperature limits; use the TQG176 for lead-free assembly.
合規資訊
Distributor compliance data (chipdig.com) lists Lead Free Status: Contains Lead and RoHS Status: RoHS Non-Compliant for A54SX32-TQ176. Commercial temperature grade (0-70 C), not AEC-Q100 relevant. Use A54SX32-TQG176 for lead-free/RoHS-compliant needs.
