A54SX08-2VQG100I - SX FPGA 8K Gates 100-TQFP | Microsemi
MPN: A54SX08-2VQG100I ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for A54SX08-2VQG100I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX08-2VQG100
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View Datasheet →A54SX08-1VQG100I
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View Datasheet →A54SX08-1VQG100I
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View Datasheet →A54SX08-VQG100
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View Datasheet →A54SX16-2VQG100I
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View Datasheet →A54SX08-2VQG100I Maximum Ratings & Electrical Characteristics
| Family | SX (Actel/Microsemi antifuse FPGA) |
| System Gates | 8000 (8K) |
| Logic Cells | 512 |
| User I/O | 81 |
| Maximum System Performance | 320 MHz |
| Process Technology | 0.35 um |
| Supply Voltage | 3.3 V / 5 V |
| Programming Technology | Antifuse (one-time programmable) |
| Package | 100-pin VQFP (TQFP) |
| Operating Temperature | -40C to +85C (industrial, I suffix) |
| Speed Grade | -2 |
| Mounting Type | Surface Mount |
| Configuration Storage | Non-volatile (on-chip antifuse, no external PROM) |
| Design Toolchain | Microsemi/Microchip Libero SoC |
| Core Voltage | 3.3 V |
| I/O Voltage Tolerance | 5 V tolerant |
A54SX08-2VQG100I 100-pin vqfp (tqfp) Pin Configuration Guide
Complete pinout information for A54SX08-2VQG100I (100-pin vqfp (tqfp) 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.
No detailed pinout data available for A54SX08-2VQG100I.
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
A54SX08-2VQG100I is suitable for 6 applications: Industrial Control Glue Logic, 5V to 3.3V Interface Translation, Secure / Anti-Tamper Control Logic, Obsolescence-Driven Redesign of TTL Boards, Aerospace and High-Reliability Prototyping, Communications and Networking Line-Card Control.
Industrial Control Glue Logic
The A54SX08-2VQG100I consolidates address decoders, bus arbiters, interrupt controllers, and state machines that were traditionally built from multiple TTL/CMOS chips. Its 512 cells and 320 MHz capability cover typical industrial control sequencing with deterministic timing, and the -40C to +85C industrial rating matches unconditioned factory environments. Because the antifuse fabric needs no configuration device, a PLC or motor-control board powers up instantly with valid logic, avoiding the boot-delay and configuration-corruption failure modes of SRAM FPGAs. Designers typically place the FPGA between a microprocessor bus and peripheral banks, using the 81 user I/Os and 5V-tolerant interface to bridge legacy 24V-adjacent TTL subsystems with modern 3.3V logic. The one-time-programmable nature also prevents field tampering with control logic, a frequent requirement in process-automation audits.
Recommended
5V to 3.3V Interface Translation
Legacy industrial and avionics systems still run 5V TTL signaling, while newer controllers use 3.3V logic. The A54SX08-2VQG100I supports 3.3V/5V operation, so it can sit directly between a 5V bus and 3.3V circuitry without level-shifter arrays, using up to 81 user I/Os. Typical roles include bus-width conversion, handshaking, and protocol translation between an aging 5V backplane and a modern 3.3V processor module. The 0.35 um process and SX routing fabric provide deterministic delays, which matters when translators sit on timing-critical handshake paths. In this role the FPGA replaces multiple 74-series octal transceivers and glue chips, cutting board area and component count. The industrial temperature range ensures the bridge remains in specification on equipment exposed to outdoor or unheated enclosures, and the non-volatile antifuse configuration removes any external configuration memory from the interface path.
Recommended
Secure / Anti-Tamper Control Logic
SRAM FPGAs expose their design through the configuration bitstream stored in external flash, making them vulnerable to cloning and readback attacks. The A54SX08-2VQG100I's antifuse configuration is buried in silicon and cannot be read out, so proprietary control logic, cryptographic glue, or authentication state machines remain protected. With 8K gates, the device accommodates moderate security blocks such as challenge-response sequencers, key-decryption front ends, or board-level enable trees. The instant-on behavior means protected logic is active before a host processor completes boot, closing the window where SRAM devices sit unconfigured. Industrial-grade -40C to +85C operation covers defense and infrastructure deployments without conformance cooling. Designers verify timing deterministically in Libero SoC, and the fixed programming eliminates any risk of configuration-tampering through the update path, since no update path exists after programming.
Recommended
Obsolescence-Driven Redesign of TTL Boards
Many legacy products rely on discontinued 74-series TTL and PAL/GAL devices. The A54SX08-2VQG100I offers 8K gates with 5V-tolerant I/O on a standard 0.5 mm pitch 100-pin VQFP, letting one FPGA absorb dozens of SSI/MSI devices and the original PAL equations with minimal electrical redesign. The 3.3V/5V dual-voltage operation preserves compatibility with the original board's supply rails, avoiding power-supply rework. Antifuse programming means the replacement behaves like the original fixed logic from the first power cycle - no boot sequencing changes are needed. The 320 MHz timing capability easily exceeds the 10-50 MHz speeds of the legacy circuits being replaced, providing timing margin. Long-term, consolidating onto one FPGA reduces sourcing exposure from dozens of obsolete line items to a single active part, and footprint-compatible family members (A54SX16) provide growth capacity if future feature additions need more gates.
Recommended
Aerospace and High-Reliability Prototyping
Actel antifuse FPGAs, including the SX family, are widely used in aerospace and defense programs because the configuration is inherently single-event-upset immune - there is no SRAM configuration bit to flip under radiation, and no configuration scrubbing circuitry is required. For flight programs that later graduate to radiation-tolerant silicon such as the RTAX series, the A54SX08-2VQG100I provides a low-cost prototyping and algorithm-validation vehicle with a similar antifuse design flow in Libero SoC, easing design migration. The 512-cell architecture handles sensor-interface glue, telemetry formatting, and supervisory sequencing typical of payload housekeeping electronics. The industrial -40C to +85C rating supports environmental test floors, and the deterministic interconnect timing simplifies worst-case timing signoff demanded by reliability reviews. The same footprint family extends to the RTAX migration path at higher densities.
Recommended
Communications and Networking Line-Card Control
Line cards and backplane adapters need fast control-path logic for frame framing flags, LED drivers, hot-swap sequencing, and register decoding. The A54SX08-2VQG100I's 320 MHz performance covers these supervisory functions while its 81 I/Os interface front-panel indicators, backplane control lines, and management buses. The 5V-tolerant I/O supports legacy chassis backplanes built around 5V signaling, which remain common in industrial networking gear. Antifuse instant-on means the card reports its presence to the shelf manager immediately at insertion, without waiting for configuration download - important for hot-swap compliance. The deterministic timing fabric allows the designer to prove setup and hold margins on the backplane handshake paths statically. For low-volume or long-lifecycle network equipment, the fixed one-time programming also eliminates firmware-version drift between units in the field, simplifying configuration management across installed bases.
Recommended
Recommended Products Summary
Engineering reference data for A54SX08-2VQG100I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX08-2VQG100 | A54SX08-1VQG100I | A54SX08-1VQG100 | A54SX16-2VQG100I |
|---|---|---|---|---|---|
| Package | 100-pin VQFP (TQFP) | 100-pin VQFP - same | 100-pin VQFP - same | 100-pin VQFP - same | 100-pin VQFP - same |
| Brand | Microsemi (Microchip) | Microsemi (Microchip) | Microsemi (Microchip) | Microsemi (Microchip) | Microsemi (Microchip) |
| System Gates | 8K | 8K | 8K | 8K | 16K |
| Logic Cells | 512 | 512 | 512 | 512 | [DATA_NEEDED] |
| User I/O | 81 | 81 | 81 | 81 | [DATA_NEEDED] |
| Speed Grade | -2 (320 MHz family rating) | -2 | -1 | -1 | -2 |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| Programming Technology | Antifuse (one-time programmable, non-volatile) | Antifuse | Antifuse | Antifuse | Antifuse |
Key Differentiators
- Fastest speed grade in the SX08 VQFP-100 family (vs A54SX08-1VQG100I)
- Industrial temperature rating for harsh environments (vs A54SX08-2VQG100)
- Configuration security with instant-on operation (vs SRAM-based FPGAs (e.g., A3PE600 flash alternative))
Design Notes
The A54SX08-2VQG100I is one-time programmable. Complete simulation, place-and-route, static timing analysis, and hardware prototype validation before burning production units - there is no field rework path. Speed grade is fixed at programming time: a -1 device can never be upgraded to -2 timing. Order a small margin of extra parts for engineering iterations, since each programming attempt consumes one device.
The device operates from a 3.3V core with 5V-tolerant I/O banks. Estimated power: with 512 cells at modest toggle rates typical of glue logic, core current is generally in the low-mA range, but exact dynamic current depends on toggle rate and routing - use the Libero power estimator for your design. Decouple each supply pin with 0.1 uF ceramics placed within 2-3 mm of the pin, plus one 10 uF bulk capacitor per rail near the package.
The 100-pin VQFP uses a 0.5 mm pitch requiring careful stencil design: use a 0.1-0.12 mm stencil aperture and a no-clean or water-wash paste to reduce bridging risk on the fine-pitch leads. If migrating between same-family variants (e.g., A54SX08 to A54SX16), verify the pinout tables match your design, as I/O assignments may differ between devices - a pin-compatible package does not guarantee identical I/O function mapping.
When driving 5V TTL loads, respect per-pin DC drive limits from the SX family datasheet electrical tables; bus-hold or external pull resistors may be needed on high-fanout nets. Unused I/Os should be configured as inputs with defined pull levels or tied off at the board level to prevent floating-node oscillation and excess static current.
Compliance Information
Compliance details were not stated in the retrieved distributor data for this older SX-family part; the G suffix in the package code historically indicates green packaging per Actel/Microsemi conventions, but this should be confirmed with the manufacturer.
