A54SX32-PQ208I - 48K Gate FPGA 174 I/O PQFP-208 | Microchip
MPN： A54SX32-PQ208I ✓ 啟用中A54SX32-PQ208I 概覽
An antifuse FPGA is a one-time-programmable field programmable gate array in which each programmable interconnect point is an amorphous silicon antifuse that permanently forms a low-resistance link during programming. Within the semiconductor hierarchy, the A54SX32-PQ208I sits under FPGA -> field-programmable logic -> programmable SoC/system logic. Unlike SRAM FPGAs, antifuse devices are non-volatile at power-up, highly resistant to configuration corruption, and need no external configuration PROM, which is why the SX family is widely deployed in aerospace, industrial, and long-lifecycle embedded systems.
Key differentiating features include the sea-of-modules architecture that enables 100% resource utilization with 100% pin locking, eliminating the routability penalties typical of channel-based FPGA architectures. The device supports 66 MHz PCI designs as a single-chip CPLD/FPGA integration solution, and its 3.3 V operation with 5.0 V tolerant inputs simplifies interfacing to legacy 5 V TTL buses.
Technically, the A54SX32 is fabricated in a 0.35 um CMOS process and contains 2,880 LABs/CLBs organized as a sea of C-cells and R-cells. This fine-grained architecture yields deterministic timing: clock skew is held to 0.25 ns and clock-to-out to 3.7 ns across the full 174 I/O, allowing high-frequency state machines and PCI interfaces to close timing without iterative floorplanning.
Typical applications include PCI bus interface logic, glueless system integration replacing multiple CPLDs and ASSPs, industrial automation controllers, and defense/industrial systems requiring non-volatile, single-chip programmable logic with long-term availability.
Design consideration: the device is one-time programmable, so prototype thoroughly in simulation and verify I/O assignments before programming; there is no in-system reprogramming fallback.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 A54SX32-PQ208I — 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-PQ208I （相同外形與佔位） — 差異在於 Package, Family, Process Technology, RoHS Status, System Gates.
A54SX32-PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-1PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-2PQG208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32-PQ208
✅ 直接替換聯絡詢價
查看資料表 →A54SX32A-PQ208I
✅ 直接替換聯絡詢價
查看資料表 →A54SX32A-1PQ208I
✅ 直接替換📋 參考替代品（不在目錄中）
A54SX32-PQ208I 最大額定值與電氣特性
| Family | Actel SX (54SX) antifuse FPGA |
| System Gates | 48000 |
| Logic Cells (Modules) | 1800 |
| LABs / CLBs | 2880 |
| User I/O | 174 |
| Internal Performance | 320 MHz |
| Clock-to-Out (Pin-to-Pin) | 3.7 ns |
| Input Set-Up | 0.1 ns |
| Clock Skew | 0.25 ns |
| Core Supply Voltage | 3.3 V (3 V to 3.6 V) |
| I/O Supply Voltage | 5 V tolerant (4.75 V to 5.25 V rail support) |
| Process Technology | 0.35 um CMOS |
| Programmability | One-time programmable antifuse |
| PCI Support | 66 MHz PCI |
| 封裝 | 208-BFQFP (PQFP-208), 28 mm x 28 mm |
| 安裝類型 | Surface Mount |
| Packaging | Tray |
A54SX32-PQ208I 208-bfqfp (pqfp-208), 28 mm x 28 mm 腳位配置指南
A54SX32-PQ208I（208-bfqfp (pqfp-208), 28 mm x 28 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-PQ208I.
請參閱 資料表 以查看完整腳位配置。
典型應用
A54SX32-PQ208I 適用於 6 應用s: 66 MHz PCI Bus Interface Logic, Industrial Automation Controllers, Single-Chip System Glue Logic Integration, Aerospace and Defense Program Legacy Support, Test and Measurement Equipment, Medical Device Control Electronics.
66 MHz PCI Bus Interface Logic
The A54SX32-PQ208I fits 66 MHz PCI interface designs directly: the 54SX datasheet lists 66 MHz PCI support as a headline capability, enabled by 0.1 ns input setup, 3.7 ns pin-to-pin clock-to-out, and 0.25 ns clock skew - margins sufficient for PCI setup/hold windows without floorplanning iterations. The device implements the PCI target and master state machines plus glue logic in a single chip, replacing several discrete CPLDs. Its 5.0 V tolerant I/O connects directly to legacy 5 V PCI signaling while the core runs at 3.3 V, avoiding level-shift circuitry. Because the antifuse fabric is one-time programmable, the bitstream is fixed at power-up with no configuration device to corrupt, improving bus availability in long-running industrial servers and test platforms.
推薦
Industrial Automation Controllers
Industrial controllers benefit from the A54SX32-PQ208I's industrial ('I') temperature screening, 48K-gate capacity, and deterministic antifuse timing. The sea-of-modules architecture supports 100% resource utilization with 100% pin locking, so encoder interfaces, stepper/pulse engines, and fieldbus glue logic coexist without routing failures as utilization climbs. The 174 user I/O accommodate parallel sensor banks, relay drivers, and legacy 5 V TTL signals through the 5.0 V tolerant inputs - a key advantage when interfacing older PLC I/O cards. Since the configuration is permanent, controllers power up instantly with no bitstream load time and cannot be corrupted by brown-outs, improving uptime on factory floors. Recommended practice: reserve 20-30% I/O and route them to test headers for in-field diagnostics.
推薦
Single-Chip System Glue Logic Integration
The A54SX32-PQ208I is architected as a single-chip CPLD and FPGA integration solution, consolidating address decoders, bus bridging, interrupts, and custom state machines that previously consumed multiple CPLDs and ASSPs. With 1,800 modules and 2880 LABs/CLBs of fine-grained fabric, it absorbs scattered 74-series and small-CPLD functions while the 320 MHz internal performance keeps critical decode paths fast. Deterministic 0.25 ns clock skew simplifies multi-domain timing closure across the glue logic. Antifuse non-volatility means the integrated design is live at the first clock edge with no external configuration PROM, saving board space and a failure point. For cost-sensitive consolidation projects, evaluate whether 16K-gate siblings (A54SX16P family) suffice before committing the 32K device.
推薦
Aerospace and Defense Program Legacy Support
Actel antifuse FPGAs carry a long heritage in aerospace and defense subsystems, where the A54SX32-PQ208I's permanent configuration, single-event immunity advantages of antifuse interconnect, and predictable power-up behavior are valued. While radiation-hardened RTAX devices serve the harshest missions, SX-family parts historically fly in non-critical avionics, ground equipment, and test sets. The 5.0 V tolerant I/O interfaces directly with legacy MIL-STD-adjacent 5 V logic still common in upgraded platforms, and the industrial temperature grade covers most ground-based environments. Procurement note: the mature SX family is sourced heavily through broker stock (roughly 3,600-5,400 pieces visible as of 2026-09-03), so defense programs should secure lifetime buys and verify date codes and provenance carefully.
推薦
Test and Measurement Equipment
Test instruments use the A54SX32-PQ208I for timing generators, trigger logic, and bus interfaces where deterministic delay matters more than reconfigurability. The 3.7 ns pin-to-pin clock-to-out and 0.25 ns skew let designers quote hard channel-to-channel timing numbers on datasheets; the 320 MHz internal fabric handles fast counters and edge-detection pipelines. Antifuse configuration eliminates the risk of a corrupted bitstream disabling a shipped instrument, and instant-on behavior removes configuration latency from warm-up sequences. The 174 I/O support wide parallel measurement buses and legacy 5 V instrumentation signals via tolerant inputs. For high-channel-count designs, the same die is available in the 329-ball BGA (A54SX32-BGG329), providing more user I/O on the same silicon.
推薦
Medical Device Control Electronics
Benchtop medical analyzers and imaging peripherals use the A54SX32-PQ208I for motor control sequencing, sensor aggregation, and host-interface glue logic. The industrial temperature screening provides margin for ventilated enclosures, and the one-time-programmable antifuse configuration supports design-control requirements: the logic image cannot drift after validation, an asset for IEC-controlled devices with strict change management. Deterministic 0.25 ns clock skew and 0.1 ns setup simplify verification documentation for safety reviews. The 5.0 V tolerant I/O connects to legacy analog-front-end control buses. Design caution: because the device is not field-reprogrammable, plan a socketed or connectorized programming flow so validated updates require controlled board rework rather than firmware pushes.
推薦
推薦產品摘要
工程參考資料，適用於 A54SX32-PQ208I — 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-PQG208I | A54SX32-1PQG208I | A54SX32-PQ208 | A54SX32A-PQ208I | A54SX32A-1PQ208I |
|---|---|---|---|---|---|---|
| Package | 208-BFQFP (PQFP-208), 28 mm x 28 mm | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same | 208-BFQFP - same |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 48,000 | 48,000 | 48,000 | 48,000 | 32K gates (1,800 cells, SX-A) | 32K gates (1,800 cells, SX-A) |
| User I/O | 174 | 174 | 174 | 174 | 174 | 174 |
| Core Supply Voltage | 3.3 V (3 V to 3.6 V) | 3.3 V | 3.3 V | 3.3 V | 2.5 V | 2.5 V |
| Process Technology | 0.35 um CMOS | 0.35 um CMOS | 0.35 um CMOS | 0.35 um CMOS | 0.25 um CMOS | 0.25 um CMOS |
| Temperature Grade | Industrial (I suffix) | Industrial (I suffix) | Industrial (I suffix) | Commercial (no I suffix) | Industrial (I suffix) | Industrial (I suffix) |
| Programmability | One-time programmable antifuse | Antifuse OTP | Antifuse OTP | Antifuse OTP | Antifuse OTP | Antifuse OTP |
| Packaging | Tray | Tray | Tray | Tray | Tray | Tray |
主要差異化特點
- Highest internal performance in the comparison set (對比A54SX32A-PQ208I)
- Industrial temperature screening retained (對比A54SX32-PQ208)
- Green molding compliance option (對比A54SX32-PQG208I)
- Faster speed bin available at identical footprint (對比A54SX32-1PQG208I)
- Honest trade-off: lower process node maturity (對比A54SX32A-PQ208I)
設計說明
The A54SX32 is one-time programmable: after antifuse programming there is no way to erase or update the device. Complete RTL simulation, timing analysis, and I/O verification before programming production units, and treat each programmed device as a consumable. Budget prototype devices separately from production stock, and archive the exact toolchain version and programming file (STAPL/FUSE) used for each build so replacements can be reproduced years later - critical for long-lifecycle industrial and aerospace programs using this mature Actel family.
The device requires dual rails: a 3.3 V core supply (3 V to 3.6 V per Microchip USA data) and support for a 4.75 V to 5.25 V I/O rail environment thanks to 5.0 V tolerant inputs. When substituting the A54SX32A-PQ208I (SX-A), the core changes to 2.5 V - boards designed for both must provision a selectable or switchable core regulator. Sequence the core rail before applying heavy I/O switching loads, and decouple each VCC pin pair with 0.1 uF ceramics placed within 2 mm of the package per standard Actel SX power-supply guidance in the family datasheet.
With 174 I/O on a 28 mm PQFP and pin-to-pin clock-to-out of 3.7 ns, ground bounce on simultaneously switching outputs is the dominant signal-integrity risk. Group SSO pins across multiple GND balls/fingers, insert series 22-33 ohm resistors on fast edges driving heavy capacitive bus loads (e.g., PCI-style buses), and keep trace stubs short on the 66 MHz PCI clock net to preserve the 0.25 ns skew budget. Follow the Actel SX family datasheet I/O guidelines and PCI specification load model when asserting drive strengths.
The 208-BFQFP has a 0.5 mm pin pitch and 28 mm x 28 mm body; design the land pattern per the mechanical drawing in the 54SX family datasheet and inspect solder joints with magnification or X-ray, since fine-pitch QFP bridges are the leading rework cause on legacy boards. The tray packaging means handling is bare - use ESD-safe nozzles and avoid pin bending during manual placement. If migrating to the BGA-based A54SX32-BGG329, note the footprint is NOT compatible; plan a new layout rather than a drop-in.
合規資訊
Broker listings reference a RoHS status field but the retrieved data does not state its value; the PQG208 suffix variants exist as green-molding options. Obtain a certificate of conformity from Microchip before use in RoHS-restricted builds.
