A54SX16-PQG208I - SX FPGA 16K Gates 175 I/O | Microsemi
MPN: A54SX16-PQG208I ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $68.5 | $68.50 |
| 10 | $63.2 | $632.00 |
| 100 | $57.8 | $5,780.00 |
| 500 | $52.4 | $26,200.00 |
| 1,000 | $48.95 | $48,950.00 |
Drop-in alternatives for A54SX16-PQG208I — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
A54SX16-2PQG208I
✅ Drop-In✓ In Stock
$47.95 / Unit
View Datasheet →A54SX16-1PQG208I
✅ Drop-In✓ In Stock
$39.9 / Unit
View Datasheet →A54SX16-2PQG208
✅ Drop-In✓ In Stock
$40.8 / Unit
View Datasheet →A54SX16-PQG208
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →A54SX16A-2PQG208I
✅ Drop-In📋 Reference alternative (not in catalog)
A54SX16P-PQG208I
✅ Drop-In✓ In Stock
$38.75 / Unit
View Datasheet →A54SX16-PQG208I Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 208-BFQFP (28x28 mm) |
| Mounting Type | Surface Mount |
| Programmability | One-time programmable (antifuse), non-volatile |
| Speed Grade | Standard (-) |
A54SX16-PQG208I 208-bfqfp (28x28 mm) Pin Configuration Guide
Complete pinout information for A54SX16-PQG208I (208-bfqfp (28x28 mm) 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 A54SX16-PQG208I.
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
A54SX16-PQG208I is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for A54SX16-PQG208I — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Supply Voltage | 3.0-3.6 V and 4.75-5.25 V (dual mode) | 3.0-3.6 V and 4.75-5.25 V | 3.0-3.6 V and 4.75-5.25 V | 3.0-3.6 V and 4.75-5.25 V | [DATA_NEEDED] | 3.3 V only (P variant) |
| 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 |
Key Differentiators
- Dual 3.3V/5V supply capability (vs A54SX16P-PQG208I)
- Industrial temperature rating at standard speed grade price (vs A54SX16-PQG208)
- Cost advantage over faster speed grades (vs A54SX16-2PQG208I)
- Legacy architecture match vs modern SRAM FPGAs (vs A54SX16A-2PQG208I)
Design Notes
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.
Compliance Information
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.
