A54SX32-TQG176

Overview

The A54SX32-TQG176 is a Field Programmable Gate Array from the Actel SX-A family, fabricated using 0.22 μm / 0.25 μm CMOS antifuse technology. It provides 48,000 system gates and 2,880 logic modules (comprising 1,800 combinatorial cells and 1,080 dedicated flip-flops). The device supports up to 249 user-programmable I/O pins and features three global clock networks. It operates with internal performance of 350 MHz and system performance of 250 MHz. The component 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 V domains with 5 V input tolerance.
• Features hot-swap compliant I/Os allowing power-up/down without voltage sequencing requirements.
• Includes unique in-system diagnostic capabilities via Silicon Explorer II and IEEE 1149.1 boundary scan testing.
• Utilizes patented metal-to-metal antifuse interconnect for deterministic timing and high-speed routing.

Applications

• Integration of 66 MHz PCI compliant designs
• High-performance state machines and fast counters
• Secure single-chip solutions requiring reverse engineering protection

Procurement Notes

Verify the specific speed grade suffix associated with the TQG176 package variant, as standard speed grades are available alongside faster options. Confirm that the ordering suffix aligns with the required temperature range, such as commercial or industrial specifications. Ensure compatibility with the Actel Designer software version used for programming the antifuse architecture.

Selection Notes

Select this model when 48,000 system gates and 249 I/Os are required within a 176-pin form factor. Consider the SX-A family's nonvolatile antifuse nature if configuration bitstream security is necessary. Evaluate the 350 MHz internal clock capability against design timing constraints to ensure the standard speed grade meets performance goals.

Part Context

This component belongs to the Actel SX-A FPGA family, which utilizes antifuse technology for permanent, low-impedance interconnections. The SX-A series is designed to replace multiple CPLDs or gate arrays by offering high-density logic with deterministic timing characteristics. The TQG176 designation indicates the specific thin quad flat pack package type utilized for this device capacity.

Replacement Considerations

Direct pin-compatible replacements within the same package and capacity are not explicitly listed in the provided documentation. Designers migrating from older SX families should verify I/O mapping and timing differences. Cross-family migration to newer Microchip architectures requires schematic redesign due to differing logic structures and pinouts.

FAQ

How does the SX-A architecture handle unused I/O pins?

Unused I/Os are automatically configured as tristate outputs by the Actel Designer software to provide maximum flexibility during board design.

What is the function of the DirectConnect feature?

DirectConnect is a horizontal routing resource providing connections from a C-cell to its neighboring R-cell within a SuperCluster, achieving signal propagation times of less than 0.1 ns without using programmable antifuses.

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

Yes, in Flexible mode, TDI, TCK, and TDO may function as user I/Os or BST pins, whereas TMS cannot be employed as a user I/O in any mode.