A54SX16P-TQG144

Overview

The A54SX16P-TQG144 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 24,000 system gates and contains 1,452 logic modules (CLBs). The device supports up to 360 user-programmable I/O pins and includes dedicated flip-flops for sequential logic. It operates with internal clock frequencies up to 350 MHz and delivers 250 MHz system performance. The component is housed in a 144-pin Thin Quad Flat Pack (TQFP) package.

Feature Summary

• Nonvolatile single-chip solution utilizing metal-to-metal programmable antifuse interconnect elements for permanent low-impedance connections.
• Supports mixed-voltage operation across 2.5 V, 3.3 V, and 5 V domains with 5 V input tolerance and drive strength.
• Features hot-swap compliant I/Os that tristate during power-up/down without requiring supply voltage sequencing.
• Includes deterministic timing architecture with DirectConnect and FastConnect routing resources for predictable signal propagation.

Applications

• High-performance digital logic integration replacing complex CPLDs or gate arrays
• PCI-compliant interface designs supporting 66 MHz bus speeds
• Systems requiring secure, nonvolatile configuration without external bitstream memory

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm temperature grade and packaging compliance. The 'P' designation indicates a Plastic Quad Flat Pack variant, while 'TQ' specifies the Thin Quad Flat Pack form factor. Ensure the selected speed grade matches the required system timing constraints before finalizing procurement orders.

Selection Notes

Select this device when a nonvolatile FPGA with high-speed antifuse technology is required. The SX-A architecture offers 100% pin-locking capability and full resource utilization. Consider the available speed grades and temperature ranges to ensure compatibility with the target application environment and performance requirements.

Part Context

This component belongs to the Actel SX-A family of FPGAs, which are designed for cost-effective, low-power, and high-performance applications. The family utilizes antifuse technology to provide robust security and deterministic performance. The A54SX16 model represents a mid-range capacity within the series, balancing logic density with I/O flexibility.

Replacement Considerations

Direct replacements within the same package and pinout include other speed grades of the A54SX16A series, such as A54SX16A-TQG144I or A54SX16A-TQG144M, provided the timing requirements are met. Cross-family migration to Microchip PolarFire or IGLOO devices requires schematic redesign due to architectural differences.

FAQ

How does the SX-A architecture handle reverse engineering?

Reverse engineering is prevented because it is difficult to distinguish between programmed and unprogrammed antifuses. Additionally, FuseLock technology hides security fuses throughout the fabric, making invasive and noninvasive attacks ineffective.

What is the behavior of I/Os during power-up?

All I/Os are configured to be hot-swappable and tristated during power-up/down. Supply voltages VCCA and VCCI do not need to be stable or sequenced, allowing them to power up in any order.

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

Yes, if the 'Reserve JTAG' option is unchecked in the design software, the TDI, TCK, and TDO pins can function as user I/Os or BST pins depending on the TAP controller state. TMS cannot be used as a user I/O.