A54SX08-1TQG176

Overview

The Microsemi A54SX08-1TQG176 is a Field Programmable Gate Array (FPGA) from the SX-A family, fabricated using 0.22 μm / 0.25 μm CMOS antifuse technology. It provides 12,000 system gates and features 768 logic modules comprising 512 combinatorial cells and 256 dedicated flip-flops. The device supports up to 130 user-programmable I/O pins and includes three global clock networks. Operating at speed grade -1, it delivers approximately 15% faster performance than standard grades with a maximum internal clock frequency of 350 MHz. It operates within a voltage range of 2.5 V to 5.25 V and is housed in a 176-pin Thin Quad Flat Pack (TQFP) package.

Feature Summary

• Supports mixed-voltage operation across 2.5 V, 3.3 V, and 5.0 V domains with 5 V input tolerance.
• Features hot-swap compliant I/Os allowing safe insertion into active systems without power sequencing requirements.
• Includes deterministic timing architecture with DirectConnect and FastConnect routing for predictable signal propagation.
• Integrates Actel Secure Programming Technology with FuseLock to prevent reverse engineering and design theft.

Applications

• High-performance embedded control systems requiring nonvolatile configuration
• Industrial automation interfaces supporting mixed voltage standards
• Secure hardware implementations utilizing antifuse-based IP protection

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm temperature grade and packaging compliance. Confirm that the TQG suffix corresponds to the required lead-free RoHS-compliant packaging variant. Ensure compatibility with existing PCB footprints for the 176-pin TQFP form factor before finalizing procurement orders.

Selection Notes

Select this component when a single-chip nonvolatile FPGA solution is required with high-speed deterministic timing. The -1 speed grade offers enhanced performance over standard devices while maintaining full resource utilization. Verify that the 176-pin package accommodates the necessary I/O count and that the operating temperature range meets the specific environmental constraints of the target application.

Part Context

This part belongs to the Actel SX-A family of FPGAs, which utilizes metal-to-metal programmable antifuse interconnect elements. The family is characterized by its sea-of-modules architecture, providing optimal register-to-logic ratios. The A54SX08 represents the entry-level capacity within the series, offering a balance of logic density and pin availability for compact designs.

Replacement Considerations

Direct replacements include other variants within the A54SX08A series such as A54SX08-1PQ208I or A54SX08-1TQ144I, provided the pin count and package dimensions are compatible with the existing board layout. Cross-family migration to newer Microchip FPGA architectures requires significant redesign due to differences in programming technology and I/O structures.

FAQ

How does the A54SX08 handle power-up sequences for supply voltages?

The device is power-up/down friendly and does not require strict sequencing for supply voltages. All I/Os are tristated during power-up until normal operating conditions are reached, preventing degradation of the host system.

What is the maximum internal clock frequency for this device?

The SX-A family devices support an internal clock frequency of up to 350 MHz, enabling fast execution of complex logic functions.

Can the JTAG pins be used as general-purpose I/Os?

Yes, in Flexible mode, TDI, TCK, and TDO can function as user I/Os or BST pins. However, TMS cannot be employed as a user I/O in either Dedicated or Flexible modes.