A54SX32A-TQ100

Overview

The A54SX32A-TQ100 is a Field Programmable Gate Array from the SX-A family, manufactured by Microchip Technology. It features 48,000 system gates and 2,880 logic modules. The device supports up to 81 user-programmable I/O pins in a 100-pin Thin Quad Flat Pack (TQFP) package. It operates on a 0.22 μm / 0.25 μm CMOS antifuse process technology with internal performance reaching 350 MHz. The standard speed grade provides deterministic timing suitable for high-performance designs.

Feature Summary

• Nonvolatile single-chip solution utilizing metal-to-metal programmable antifuse interconnect elements for permanent low-impedance connections.
• Supports mixed-voltage operation including 2.5 V, 3.3 V, and 5 V I/O standards with 5 V input tolerance and drive strength.
• Hot-swap compliant I/Os allowing safe insertion into electrically active systems without degrading host reliability.
• Includes dedicated clock networks (HCLK, CLKA, CLKB) and boundary-scan testing compliance with IEEE Standard 1149.1.

Applications

• High-performance digital signal processing requiring deterministic timing
• PCI-compliant interface designs operating at 66 MHz
• Systems requiring hot-swappable capabilities or cold-sparing configurations

Procurement Notes

Verify the specific temperature grade suffix required for the application environment, as the base model designation does not specify commercial, industrial, automotive, or military ranges. Confirm RoHS compliance status if lead-free packaging is mandated for the manufacturing process. Check for end-of-life notifications or discontinuation notices prior to finalizing procurement plans.

Selection Notes

Select this component when 48,000 system gates and 2,880 logic modules are sufficient for the design complexity. Ensure the 100-pin TQFP package fits the PCB layout constraints. Verify that the standard speed grade meets the maximum system clock requirements, noting that faster grades like -1 or -2 offer approximately 15% and 25% improvements respectively.

Part Context

This part belongs to the Actel SX-A family of FPGAs, which are fabricated using antifuse technology. The family includes devices ranging from 12,000 to 108,000 system gates. The A54SX32A variant specifically offers a balance of capacity and pin count, making it suitable for mid-range applications within the broader SX-A portfolio.

Replacement Considerations

Direct replacements include other speed grades of the same package such as A54SX32A-1TQ100 or A54SX32A-2TQ100 for higher performance. Different temperature grades like A54SX32A-ITQ100 (Industrial) or A54SX32A-ATQ100 (Automotive) serve as functional equivalents with adjusted environmental ratings.

FAQ

What is the default state of unused JTAG pins in Flexible mode?

In Flexible mode, TDI, TCK, and DDO function as user I/Os upon power-up. An external 10 kΩ pull-up resistor should be placed on the TMS pin to ensure it defaults to High.

Can the HCLK pin be left floating if not used?

No, the HCLK pin must be set to Low or High on the board if not used. Leaving it floating can cause false output levels due to slow power-on-reset signals.

How does the SX-A architecture handle reverse engineering protection?

Reverse engineering is prevented because it is difficult to distinguish between programmed and unprogrammed antifuses. Additionally, FuseLock technology hides security fuses throughout the fabric to prevent internal probing and overwriting.