A54SX16-CQ208B - 16K Gate SX FPGA 205MHz CQFP-208 | Microsemi
MPN: A54SX16-CQ208B ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $128.5 | $128.50 |
| 10 | $115.65 | $1,156.50 |
| 100 | $102.8 | $10,280.00 |
| 500 | $92.52 | $46,260.00 |
| 1,000 | $83.27 | $83,270.00 |
Drop-in alternatives for A54SX16-CQ208B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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A54SX16-CQ208
✅ Drop-In📋 Reference alternative (not in catalog)
A54SX32-CQ208B
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View Datasheet →A54SX32-1CQ208B
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$138.75 / Unit
View Datasheet →A54SX32-CQ208
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$1545.45 / Unit
View Datasheet →A54SX32-1CQ208
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View Datasheet →A54SX16-CQ208B Maximum Ratings & Electrical Characteristics
| Family | SX (Actel antifuse FPGA) |
| System Gates | 16000 |
| Logic Cells | 924 |
| Maximum Toggle Frequency | 205 MHz |
| User I/O | 175 |
| Process Technology | 0.35 um CMOS |
| Supply Voltage (Core) | 3 V to 3.6 V |
| Supply Voltage (I/O) | 4.75 V to 5.25 V |
| I/O Voltage Tolerance | 3.3 V / 5 V |
| Programming Technology | Antifuse (one-time programmable) |
| Package | 208-BFCQFP with Tie Bar (75 x 75 mm) |
| Mounting Type | Surface Mount |
| Packaging | Bulk |
| Speed Grade | Standard (no dash speed suffix) |
| Series | SX |
A54SX16-CQ208B 208-bfcqfp with tie bar (75 x 75 mm) Pin Configuration Guide
Complete pinout information for A54SX16-CQ208B (208-bfcqfp with tie bar (75 x 75 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-CQ208B.
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-CQ208B is suitable for 6 applications: Legacy Industrial Control Logic Integration, Military and Aerospace Legacy Board Maintenance, Telecommunications Line Card Bus Bridging, Test and Measurement Fixture Logic, Obsolescence Mitigation and Last-Time-Buy Redesign, Medical Equipment Controller Spares.
Legacy Industrial Control Logic Integration
The A54SX16-CQ208B consolidates discrete 74-series glue logic, address decoders, and state machines in industrial controllers that run on 5V buses. Its 5V-tolerant I/O ring (4.75V-5.25V rail) connects directly to legacy PLC backplanes without level shifters, while the 3.3V core fabric delivers up to 205 MHz internal toggle rates - far beyond what the original TTL logic achieved. Because the antifuse fabric configures instantly at power-up, the controller needs no configuration flash and no boot sequence, improving fault-detection timing in safety-relevant interlocks. One 208-pin CQFP replaces dozens of SSI/MSI packages, cutting board area and improving mean time between failures in retrofits of 1990s-era control systems.
Recommended
Military and Aerospace Legacy Board Maintenance
Ceramic CQFP packaging with tie bar was chosen for military and aerospace programs because of its hermeticity, thermal robustness, and screening options (the B suffix). The A54SX16-CQ208B supports spares and repair of fielded avionics and defense line-replaceable units whose design environments assume 5V signals and ceramic-packaged programmable logic. The antifuse fabric's immunity to configuration upset and readback makes it attractive in programs with security constraints, and its one-time programming eliminates single-event configuration-loss modes present in SRAM FPGAs. When exact 16K-gate die stock runs out, the same-footprint A54SX32-CQ208B with 32K gates provides a verified migration path without PCB redesign.
Recommended
Telecommunications Line Card Bus Bridging
Legacy telecom line cards frequently mix 5V backplane signaling with 3.3V on-card processing, a combination the A54SX16-CQ208B natively supports with its dual 3.3V/5V supply architecture. The 175 user I/Os handle wide parallel T1/E1 framers, HDLC controllers, and backplane arbiters, while the 924 logic cells implement the glue and handshaking between them. Deterministic antifuse routing timing simplifies meeting fixed setup/hold windows against backplane clocks without timing-constraint iteration. Because the SX architecture toggles at up to 205 MHz, timing closure on the card's fastest interfaces is comfortable despite the 0.35 um process, and the ceramic package tolerates the elevated ambient temperatures of central-office racks.
Recommended
Test and Measurement Fixture Logic
Production test fixtures benefit from the A54SX16-CQ208B's instant-on antifuse configuration: the fixture is active the moment power is applied, with no configuration load time adding to test-cycle overhead. The 5V-tolerant I/O interfaces directly with the target board's legacy test points, and the 205 MHz fabric can implement high-speed pattern generators and comparators in a single chip. In bed-of-nails and functional testers, the CQFP's ceramic package and tie bar maintain stable electrical characteristics over millions of insertion cycles and wide laboratory temperature swings. Designs prototyped and frozen in antifuse silicon also cannot be accidentally altered between test runs, protecting fixture integrity and repeatability across production shifts.
Recommended
Obsolescence Mitigation and Last-Time-Buy Redesign
When an original ASIC or PLD goes end-of-life, the A54SX16-CQ208B frequently serves as the replacement fabric: its 16K gates absorb decoded counters, bus interfaces, and sequencers formerly cast in custom silicon, and its ceramic CQFP can often be adapted onto legacy footprints with minimal rework. The 5V I/O eliminates the level-shifting that modern 1.8V/2.5V FPGAs would require, keeping the redesign confined to the component itself. Antifuse one-time programming means the replacement behaves exactly like a fixed ASIC at power-up - no firmware load, no boot device, and no configuration readback risk - which eases requalification paperwork for regulated industries such as medical and transportation equipment.
Recommended
Medical Equipment Controller Spares
Older medical imaging and monitoring systems used 5V programmable logic; service organizations maintaining them rely on the A54SX16-CQ208B to keep controllers, interface boards, and safety interlock logic serviceable. The instant-on antifuse configuration guarantees that patient-facing equipment resumes operation within microseconds of power application, with no risk of a corrupted configuration image from a failing boot flash. The ceramic CQFP withstands repeated autoclave-adjacent ambient cycling better than plastic packages, and the B-suffix screening supports the quality documentation demanded in medical device change control. Its 205 MHz logic speed covers reconstruction pipelines in ultrasound front-end boards of that generation.
Recommended
Recommended Products Summary
Engineering reference data for A54SX16-CQ208B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX16-CQ208 | A54SX32-CQ208B | A54SX32-1CQ208B | A54SX32-1CQ208 |
|---|---|---|---|---|---|
| Package | 208-BFCQFP with Tie Bar | 208-BFCQFP with Tie Bar - same | 208-BFCQFP with Tie Bar - same | 208-BFCQFP with Tie Bar - same | 208-BFCQFP with Tie Bar - same |
| Brand | Microsemi (Actel) | Microsemi | Microsemi | Microsemi | Microsemi |
| System Gates | 16000 | 16000 | 32000 | 32000 | 32000 |
| Logic Cells | 924 | 924 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Speed Grade | Standard | Standard | Standard | -1 (faster) | -1 (faster) |
| Screening / Suffix | B (burn-in / Hi-Rel option) | Standard (no B) | B | B | Standard (no B) |
| Supply Voltage | 3.0-3.6 V core, 4.75-5.25 V I/O | 3.0-3.6 V core, 4.75-5.25 V I/O | 3.0-3.6 V core, 4.75-5.25 V I/O | 3.0-3.6 V core, 4.75-5.25 V I/O | 3.0-3.6 V core, 4.75-5.25 V I/O |
| Max Toggle Frequency | 205 MHz | 205 MHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 16K-gate density in hermetic ceramic CQFP (vs A54SX16-TQG176)
- Burn-in screened variant available (vs A54SX16-CQ208)
- Capacity-upgrade path on the same footprint (vs A54SX32-CQ208B)
Design Notes
The A54SX16-CQ208B requires two independent supplies: 3.3V (3.0V-3.6V) for the antifuse logic fabric and 5.0V (4.75V-5.25V) for the I/O ring. Sequence the 3.3V core before or simultaneously with the 5V I/O rail to avoid latch-up paths through the I/O drivers, and decouple each supply pin with 0.1 uF ceramic capacitors placed within 5 mm of the pin. Because antifuse FPGAs draw essentially zero static configuration current, total supply design can be sized on dynamic I/O switching current alone.
This device is one-time programmable: a design error is unrecoverable in the physical part. Always complete full timing simulation with back-annotated antifuse delays and prototype the design on an A54SX32 (larger same-family die) before committing to programming the 16K part. Also confirm speed-grade suffixes when purchasing - the B suffix indicates screening, and the -1 dash on some A54SX32 variants indicates a faster grade; mixing these in one BOM can produce units with different timing.
The 208-CQFP (75 x 75 mm body) is a gull-wing ceramic package, so use standard QFP land patterns with adequate solder fillet area and inspect joints on all four sides with X-ray or AOI. Provide a solid ground plane under the package to control return paths for the 205 MHz internal switching, and route the 5V I/O ring away from sensitive analog traces since 5V swings generate larger di/dt than modern low-voltage FPGAs. Keep unused I/Os programmed as inputs with pull-ups to prevent floating-node oscillation.
Compliance Information
Ceramic CQFP hermetic package; compliance status not stated in the provided data. As an obsolete part, RoHS exemption status for lead-containing ceramic packages should be confirmed with the distributor.
