A54SX16P-1TQ176I

Overview

The A54SX16P-1TQ176I 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 1,452 configurable logic blocks (CLBs). The device supports a maximum internal clock frequency of 350 MHz and operates at 3.3 V or 5.0 V with 5.0 V input tolerance. It is housed in a 176-pin Thin Quad Flat Pack (TQFP) package with a lead count of 176. The -1 speed grade offers approximately 15% faster performance than the standard grade. The Industrial temperature grade (-I) ensures operation within a range of -40°C to +85°C.

Feature Summary

• Supports mixed-voltage I/O standards including 3.3 V PCI, 5 V TTL, and 2.5 V LVCMOS2 with individual pin configuration capabilities.
• Features hot-swap compliant I/Os allowing safe insertion into active systems without power sequencing requirements.
• Includes dedicated boundary-scan testing (JTAG) for in-system diagnostic verification and debugging.
• Utilizes nonvolatile antifuse architecture that prevents reverse engineering and design theft.

Applications

• Integration of 66 MHz PCI compliant interfaces
• High-performance state machine implementations
• Fast counter and data path logic designs

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm the package type, speed grade, and temperature rating. Confirm RoHS compliance status as packaging options vary by manufacturer lot. Ensure the component matches the exact part number required for your design specifications before procurement.

Selection Notes

Select this model when a nonvolatile FPGA solution with deterministic timing and high-speed performance is required. The -1 speed grade is suitable for designs needing faster propagation delays than the standard grade. Verify that the 176-pin TQFP package fits the PCB layout constraints and that the Industrial temperature range meets environmental requirements.

Part Context

This component belongs to the Actel SX-A family of FPGAs, which are designed for low-power, high-performance applications. The family utilizes metal-to-metal programmable antifuse interconnect elements to provide permanent connections. The A54SX16 variant specifically targets designs requiring moderate logic density with robust I/O flexibility.

Replacement Considerations

Check for updated Microchip versions of the SX-A family. Verify if newer packages or speed grades offer equivalent functionality. Ensure any substitute maintains the same pinout and voltage levels to avoid redesigning the host board.

FAQ

What is the difference between Dedicated and Flexible JTAG modes?

In Dedicated mode, all JTAG pins are reserved for Boundary Scan Testing and cannot be used as user I/Os. In Flexible mode, TDI, TCK, and TDO can function as either user I/Os or BST pins depending on the TAP controller state.

How does the device handle power-up sequences?

The SX-A family is power-up/down friendly, meaning supply voltages do not require strict sequencing. All I/Os are tristated during power-up until normal operating conditions are reached.

What routing resources are available for fast signal propagation?

The device features DirectConnect for horizontal routing within SuperClusters with less than 0.1 ns delay, and FastConnect for routing between modules with a maximum delay of 0.3 ns.