A54SX08-2PLG84 - SX FPGA, 8K Gates, 84-PLCC | Microsemi
MPN: A54SX08-2PLG84 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $26.1 | $261.00 |
| 100 | $23.8 | $2,380.00 |
| 500 | $21.9 | $10,950.00 |
| 1,000 | $20.4 | $20,400.00 |
A54SX08-2PLG84 Overview
An FPGA (Field-Programmable Gate Array) is a semiconductor device containing a fabric of configurable logic blocks and interconnects that the designer programs after manufacturing. The Actel SX family uses a sea-of-modules antifuse architecture, in which one-time-programmable antifuse interconnect elements are permanently set during device programming. Compared with SRAM-based FPGAs, this architecture eliminates configuration storage, reduces power consumption, improves security against design theft, and removes the need for a boot PROM.
Key features of the A54SX08-2PLG84 include 0.35 um process technology for high-speed operation, 3.7 ns pin-to-pin clock-to-out delay, 0.1 ns input setup time, and 0.25 ns clock skew. The -2 speed grade delivers timing suitable for performance-intensive applications such as 66 MHz PCI designs, which the SX family supports as a single-chip solution with 100% resource utilization and 100% pin locking.
The antifuse sea-of-modules architecture routes signals through dedicated fast and long-line interconnect resources, delivering integration levels and clock speeds that were exceptional for its generation. Dual-supply operation (3.3V core/5V tolerant I/O support per family specification) allows integration into both legacy 5V systems and newer 3.3V boards.
Typical applications include industrial control and automation, legacy PCI interface logic, telecommunications line cards, military and aerospace upgrades requiring long-term availability of proven antifuse silicon, and obsolete-design lifecycle extensions where re-programmability is not required.
Designers should note that antifuse FPGAs are one-time programmable: the design cannot be changed after programming, so thorough pre-programming simulation and timing verification in Libero/Microsemi design tools are essential.
This page synthesizes verified distributor data, stock availability, drop-in alternatives, and practical design guidance not found in a single manufacturer source.
Drop-in alternatives for A54SX08-2PLG84 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with A54SX08-2PLG84 (same form factor and footprint) — differing in Process Technology, Logic Cells, Package / Case, Supplier Device Package, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
A54SX08-PLG84I
✅ Drop-In✓ In Stock
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View Datasheet →A54SX08-1PLG84
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
A54SX08-PLG84I
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →A54SX08-2PLG84 Maximum Ratings & Electrical Characteristics
| Series | SX |
| System Gates | 8000 |
| Logic Cells | 512 |
| User I/O | 69 |
| Internal Performance | 320 MHz |
| Clock-to-Out (Pin-to-Pin) | 3.7 ns |
| Input Set-Up Time | 0.1 ns |
| Clock Skew | 0.25 ns |
| Process Technology | 0.35 um |
| Supply Voltage | 3 V to 3.6 V, 4.75 V to 5.25 V |
| Programmable Type | Antifuse (one-time programmable) |
| Architecture | Sea-of-modules |
| Package / Case | 84-LCC (J-Lead), PLCC 29.31 x 29.31 mm |
| Supplier Device Package | 84-PLCC |
| Speed Grade | -2 |
| Mounting Type | Surface Mount |
A54SX08-2PLG84 84-plcc Pin Configuration Guide
Pin configuration for A54SX08-2PLG84 (84-plcc 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 A54SX08-2PLG84.
Refer to the datasheet for full pin configuration.
Typical Applications
A54SX08-2PLG84 is suitable for 6 applications: 66 MHz PCI Interface Logic, Industrial Control and Automation, Legacy Design Lifecycle Extension, Telecommunications Line Cards, Aerospace and Defense Board Upgrades, Test and Measurement Instrumentation.
66 MHz PCI Interface Logic
The A54SX08-2PLG84 fits PCI bus interface designs because the Actel SX family datasheet explicitly targets 66 MHz PCI compliance as a single-chip solution with 100% resource utilization and 100% pin locking. The -2 speed grade delivers 3.7 ns pin-to-pin clock-to-out and 0.1 ns input setup, providing the AC margins required to meet PCI setup and hold windows at 66 MHz. Implemented as a state machine plus target/master interface in the 8,000-gate fabric, the design eliminates a separate PCI ASIC. Because the antifuse fabric is one-time programmable, the interface is fixed and secure in production, and the 3.3V supply option integrates cleanly with standard PCI signaling environments.
Recommended
Industrial Control and Automation
The A54SX08-2PLG84 suits industrial control panels, motor sequencing logic, and sensor aggregation where a fixed, immediately-live logic function is desired at power-up. The antifuse architecture requires no configuration PROM, so the PLCC-mounted FPGA begins operation within microseconds of rail validation, an advantage on factory lines where reset behavior must be deterministic. Dual supply support (3.0V-3.6V and 4.75V-5.25V) allows interface with legacy 5V industrial I/O subsystems. With 69 user I/Os and 8,000 gates, the device absorbs address decoders, sequencers, and interlock logic that would otherwise occupy several TTL devices, reducing board count and improving reliability. The industrial-temperature A54SX08-PLG84I variant is recommended for uncontrolled plant-floor environments.
Recommended
Legacy Design Lifecycle Extension
Many boards built in the late 1990s and 2000s around Actel SX FPGAs remain in service in telecom, test equipment, and defense platforms. The A54SX08-2PLG84 is a direct sourcing solution for these programs: it matches the original 84-PLCC footprint, accepts the original fusestream design, and is stocked by DigiKey, Mouser, and secondary distributors (over 4,900 pieces reported at one source as of 2026-09-03). Because the antifuse design never changes electrically, drop-in replacement carries no requalification risk beyond incoming inspection. Procurement teams should buy buffer stock given the 0.35 um process age, and verify speed-grade markings (-1 vs -2) match the original design's timing analysis before assembly.
Recommended
Telecommunications Line Cards
Telecom line cards frequently used SX-family FPGAs for framing, backplane interfacing, and glue logic between physical-layer devices and backplane controllers. The A54SX08-2PLG84 provides 320 MHz internal performance with 0.25 ns clock skew, sufficient for high-speed counters and synchronous state machines within an 8K-gate budget. The antifuse fabric's low static power suits always-on line-card shelves, and its fixed interconnect avoids configuration-upset concerns in electrically noisy central-office environments. The 84-PLCC J-lead package offers compliant, inspectable leads for wave-soldered legacy card assemblies. Where additional capacity is needed, pin-richer SX16 and SX32 family members in TQFP and PQFP packages provide a straightforward architectural migration path using the same design tools and HDL source.
Recommended
Aerospace and Defense Board Upgrades
Antifuse FPGAs are favored in defense and avionics upgrades because their one-time-programmed interconnect has no configuration SRAM to upset, no external boot device to fail, and no readback path that would expose design IP. The A54SX08-2PLG84's 84-PLCC package supports socketed field-replaceable modules common in maintainable military systems. Platforms refreshing obsolescent boards can use the SX08 with the original design files, preserving certification evidence for the logic function while replacing only the silicon. Microchip's continued support of the Actel heritage families through the Microsemi acquisition provides documentation continuity. For extended-temperature enclosures, pair with the A54SX08-PLG84I industrial-grade variant and derate timing per the 54SX family datasheet's temperature tables.
Recommended
Test and Measurement Instrumentation
Bench and rack instruments use FPGA glue logic for trigger distribution, counter/timer functions, and bus interfacing, all fixed once the product ships. The A54SX08-2PLG84 provides the deterministic timing a measurement platform needs: 0.1 ns input setup and 0.25 ns clock skew keep multi-channel trigger paths tightly matched, directly improving measurement repeatability. Its 8,000-gate capacity accommodates addressing, decoding, and handshaking around the instrument's processor and ADC subsystems. Because the antifuse configuration is immutable, units behave identically across the production fleet, simplifying calibration correlation. New instrument designs should consider faster modern Microchip FPGAs, but the SX08 remains a sound choice for service spares and derivative boards of existing platforms using the proven 84-PLCC footprint.
Recommended
Recommended Products Summary
Engineering reference data for A54SX08-2PLG84 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | A54SX08-PLG84I | A54SX08-1PLG84 | A54SX08-PLG84 |
|---|---|---|---|---|
| Package | 84-PLCC (29.31 x 29.31 mm) | 84-PLCC - same | 84-PLCC - same | 84-PLCC - same |
| Brand | Microsemi (Microchip) | Microsemi (Microchip) | Microsemi (Microchip) | Microsemi (Microchip) |
| System Gates | 8,000 | 8,000 | 8,000 | 8,000 |
| User I/O | 69 | 69 | 69 | 69 |
| Supply Voltage | 3.0-3.6 V / 4.75-5.25 V | 3.0-3.6 V / 4.75-5.25 V | 3.0-3.6 V / 4.75-5.25 V | 3.0-3.6 V / 4.75-5.25 V |
Key Differentiators
- Fastest available speed grade in the 84-PLCC SX08 family (vs A54SX08-1PLG84)
- Industrial temperature option with identical footprint (vs A54SX08-PLG84I)
- Antifuse security and instant-on operation (vs SRAM-based FPGAs (any brand))
Design Notes
The A54SX08-2PLG84 specifies dual supply ranges (3.0V-3.6V and 4.75V-5.25V per the supplier data). Identify which rail feeds core versus I/O in your board per the 54SX family datasheet and decouple each with at least 0.1 uF ceramic plus 10 uF bulk capacitance placed close to the PLCC power pins. Antifuse devices draw negligible static current compared with SRAM FPGAs, but dynamic ICC scales with design toggle rate, so base your regulator sizing on the post-layout power estimate from the Microsemi design software, not on a generic family figure.
This is a one-time-programmable device: there is no design iteration after programming. Complete gate-level simulation, static timing analysis at your temperature and voltage corners, and design sign-off before burning devices. Confirm the speed grade marking (-1 vs -2) on received stock matches your timing closure; a -1 part in a -2 socket can fail marginally at temperature even though it passes bench checks at room temperature. For replacement buys, verify the I (industrial) suffix only when industrial temperature is actually required.
The 84-PLCC J-lead package has leads on all four sides with 1.27 mm pitch and requires a footprint per the 54SX family datasheet mechanical drawing (29.31 x 29.31 mm body). If your board uses a socket for field replacement, confirm the socket contacts support the J-lead geometry and that socket parasitic inductance does not compromise your I/O timing or signal integrity on fast edges. For direct SMT assembly, PLCC footprints tolerate wave soldering well, but inspect J-lead coplanarity on incoming stock from broker channels.
Compliance Information
Compliance data not present in retrieved distributor summaries. Mature Actel-era PLCC parts are frequently supplied with tin-lead leads; verify RoHS/lead status on the official Microchip product compliance page before ordering.
