A54SX32-2BG329I - 48K-Gate FPGA, 249 I/O | Microchip Technology
MPN: A54SX32-2BG329I ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for A54SX32-2BG329I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX32-2BGG329I
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$88.9 / Unit
View Datasheet →A54SX32-2BGG329
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View Datasheet →A54SX32-BG329I
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$560 / Unit
View Datasheet →A54SX32-1BGG329I
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$47.8 / Unit
View Datasheet →A54SX32-BGG329I
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A54SX32-2BG329I Maximum Ratings & Electrical Characteristics
| System Gates | 48K |
| Number of User I/O | 249 |
| Package | 329-BBGA |
| Speed Grade | -2 |
| Technology | Antifuse (one-time programmable) |
| Family | SX (Actel SX) |
| Architecture | Sea-of-modules |
| Temperature Grade | Industrial (-40C to +85C) |
| Mounting Type | Surface Mount |
| Configuration | Non-volatile, instant-on (antifuse) |
| RoHS Status | Non-Compliant (Contains Lead) |
| Lead Free Status | Contains Lead |
A54SX32-2BG329I [data_needed: package dimensions] Pin Configuration Guide
Complete pinout information for A54SX32-2BG329I ([data_needed: package dimensions] 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.
![[data_needed: package dimensions] package pinout diagram for A54SX32-2BG329I](/assets/package-diagrams/default.svg?v=1788069619)
No detailed pinout data available for A54SX32-2BG329I.
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
A54SX32-2BG329I is suitable for 6 applications: Aerospace and Defense Electronics, Industrial Automation and Control, Communications and Networking Interface Bridging, Test and Measurement Instrumentation, Secure and Tamper-Resistant Logic, Legacy System Sustainment and Obsolescence Management.
Aerospace and Defense Electronics
The A54SX32-2BG329I fits avionics and defense logic because its antifuse configuration is non-volatile, instant-on, and immune to configuration corruption - an inherent advantage over SRAM FPGAs whose bitstreams must be loaded from external flash at every power-up. With 48K system gates and 249 user I/O in the 329-ball BGA, it integrates glue logic, bus interfaces, and custom state machines that would otherwise require multiple ASSPs. In flight-critical boards, the single-chip integration reduces component count and solder-joint failure points, and the deterministic sea-of-modules routing avoids the configuration-upset considerations of reprogrammable fabrics. For orbital or high-radiation missions, pair the design methodology with the radiation-tolerant RTAX family from the same Microchip lineage.
Recommended
Industrial Automation and Control
In industrial controllers and PLC I/O modules, the A54SX32-2BG329I provides deterministic, instant-on logic that is active within microseconds of power application - critical where control signals must be valid before a microprocessor finishes booting. The industrial temperature rating matches factory-floor environments, and 249 user I/O in one 329-BBGA consolidates sensor interfaces, encoder counters, and interlock logic into a single programmable device. Antifuse programming also prevents field tampering with control logic, since the configuration physically exists in silicon and cannot be dumped or altered. Designers should budget for one-time programmability: freeze the RTL and pinout, verify timing closure at the -2 speed grade, then commit, holding spare A54SX32 devices for engineering-change iterations.
Recommended
Communications and Networking Interface Bridging
The SX family sea-of-modules architecture was explicitly designed for performance-intensive applications, making the -2 speed grade A54SX32 well suited to high-speed protocol bridging, backplane glue logic, and line-card interface functions in networking equipment. The antifuse interconnect presents low on-chip capacitive loading, supporting fast setup-to-output paths for synchronous bus transfers, while the 249 I/O covers wide data buses and multi-port interface fan-out in the compact 329-ball BGA. Because configuration is permanent, deployed telecom hardware resists bitstream corruption from power anomalies. When integrating with precision analog front ends or isolated interfaces, pair with ISO6763DWR digital isolators on the board-side signals to protect the FPGA I/O banks.
Recommended
Test and Measurement Instrumentation
Bench and automated test instruments use the A54SX32-2BG329I as timing-controller and acquisition glue logic: its instant-on antifuse configuration means trigger and gating logic is operational before instrument firmware loads, and the -2 speed grade supports fast counter and state-machine paths for precision timing measurements. The 249 user I/O in the 329-BBGA connects high-pin-count DUT interfaces, relay matrices, and multichannel ADC/DAC subsystems without external fan-out logic. Because the programmed bitstream cannot be extracted, measurement algorithms embedded in the fabric remain protected - valuable for calibrated instruments. For the analog acquisition side, pair the FPGA with a precision converter such as the ADS1220IPWR 24-bit ADC sequenced and controlled directly by SX fabric I/O.
Recommended
Secure and Tamper-Resistant Logic
Applications requiring configuration confidentiality - encryption key handling boards, license-control hardware, anti-cloning modules - benefit directly from antifuse technology. Unlike SRAM FPGAs, whose bitstream must be stored externally and can be intercepted during configuration, the A54SX32-2BG329I's programming exists as permanent silicon connections with no external configuration memory to read. This makes reverse engineering of implemented logic substantially harder, protecting proprietary algorithms at the hardware level. With 48K gates there is room for moderate custom crypto cores or authentication state machines, and 249 I/O supports parallel key or sensor interfaces. Designers should still follow system-level secure-boot practices in the host processor, using the FPGA as one layer of a defense-in-depth architecture.
Recommended
Legacy System Sustainment and Obsolescence Management
Many fielded platforms - military ground vehicles, avionics, industrial plants with 20-year service lives - were designed around Actel SX FPGAs and must be sustained long after original design. The A54SX32-2BG329I remains listed by Mouser, DigiKey, Suntsu, Ampheo, and Microchip USA as of 2026-09-03, making it a sustenance part for these programs. For assemblies migrating to lead-free processes, the A54SX32-2BGG329I provides an identical-function drop-in within the same 329-ball footprint lineage, allowing mixed-alloy board strategies. Procurement teams should qualify both the original and lead-free variant, keep spare programmed devices for one-time-programmable field replacements, and maintain reprogrammable engineering stock since each design iteration consumes a new device.
Recommended
Recommended Products Summary
Engineering reference data for A54SX32-2BG329I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX32-2BGG329I | A54SX32-BG329I | A54SX32-1BGG329I | A54SX32A-2BG329I |
|---|---|---|---|---|---|
| Package | 329-BBGA | 329-BBGA - same | 329-BBGA - same | 329-BBGA - same | 329-BBGA - same |
| Brand | Microchip Technology (Actel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology (SX-A family) |
| System Gates | 48K | 48K | 48K | 48K | 48K (SX-A) |
| User I/O | 249 | 249 | 249 | 249 | 249 |
| Speed Grade | -2 (fast) | -2 (fast) | Standard | -1 | -2 (SX-A fabric) |
| Temperature Grade | Industrial (I) | Industrial (I) | Industrial (I) | Industrial (I) | Industrial (I) |
| RoHS / Lead-Free | Non-Compliant (Contains Lead) | Lead-free (G) variant | Contains Lead | Lead-free (G) variant | [DATA_NEEDED] |
| Design Portability | Reference design | Same family - recompile only | Same family - recompile, timing check at slower grade | Same family - recompile, timing check at -1 | SX-A family - recompile + full timing re-verification |
Key Differentiators
- Faster timing at identical footprint and I/O count (vs A54SX32-BG329I)
- RoHS-compliant drop-in available (vs A54SX32-2BGG329I)
- Same-generation silicon vs SX-A recompile risk (vs A54SX32A-2BG329I)
Design Notes
Antifuse FPGAs are one-time programmable: once blown, the configuration is permanent and the device cannot be reused. Maintain a programming-margin strategy - never use your last verified-good device for an experimental iteration, and hold unprogrammed engineering stock. All timing closure, pin assignment, and RTL verification must be complete before committing the fuse map. This is the single most common field failure mode when teams accustomed to SRAM FPGAs adopt the SX family.
Distributor data (digchip) marks the A54SX32-2BG329I as Contains Lead / RoHS Non-Compliant. For new builds shipping to EU markets this is a compliance blocker - specify the A54SX32-2BGG329I lead-free variant instead, which shares the same 48K gates, 249 I/O, -2 speed grade, and 329-ball footprint. For legacy leaded assemblies, verify your soldering process temperature profile compatibility before mixing alloys on the same board.
The 329-ball BGA requires controlled-impedance multilayer routing with via-in-pad or dogbone fan-out for the 249 user I/O plus dedicated power, ground, and programming balls. Follow the ball-map table in the Microchip 54SX family datasheet exactly when generating the footprint - do not rely on third-party footprints without verification. Provide solid ground and power planes beneath the package, and decouple each supply ball bank with ceramic capacitors placed within a few millimeters of the BGA perimeter.
Estimated: the SX antifuse family draws no configuration-load current at power-up because programming is permanent in silicon, so supply sequencing constraints are simpler than SRAM FPGAs - there is no configuration power-rail ramp requirement. However, exact core and I/O supply currents at the -2 speed grade depend on design toggle rates and are not in the captured data; use the Microchip SX family power estimation spreadsheet with your post-layout netlist before finalizing the regulator budget.
Compliance Information
Per distributor datasheet summary (digchip): Lead Free Status = Contains Lead; RoHS Status = RoHS Non-Compliant. Lead-free BGG329 variants exist within the same family for compliant assemblies.
