TIBPAL16R4-5CFN

Overview

The TIBPAL16R4-5CFN is a high-performance PAL circuit from Texas Instruments, utilizing Advanced Low-Power Schottky technology and titanium-tungsten fuses. It features 8 inputs and 4 registered outputs with 3-state buffers. The device operates within a commercial temperature range of 0°C to 75°C and supports a supply voltage of 5V nominal. Key electrical characteristics include a maximum propagation delay (CLK-to-Q) of 4 ns and a minimum fmax of 125 MHz without feedback. It includes power-up clear functionality for registers and an asynchronous preload capability to simplify testing.

Feature Summary

• High-speed operation with 125 MHz minimum fmax (no feedback) and 4 ns max CLK-to-Q propagation delay.
• Registered output architecture with 4 Q outputs and 3-state control via OE pin.
• Asynchronous preload capability allows individual register initialization for simplified testing.
• Power-up clear feature resets all registers to zero upon power application.

Applications

• High-speed state machine implementations requiring external feedback paths.
• Counter designs utilizing internal feedback configurations.
• Custom logic functions replacing conventional TTL logic in compact board designs.

Procurement Notes

Verify the specific suffix 'FN' corresponds to the plastic flat package variant as defined in the datasheet pinout diagrams. Confirm the '5C' speed grade matches the required 0°C to 75°C operating temperature range. Ensure programming equipment supports titanium-tungsten fuse technology for this IMPACT-X series device.

Selection Notes

Select this model when four registered outputs with tri-state capability are required. Compare against TIBPAL16R6 or TIBPAL16R8 if more registered outputs are needed. Choose the 'M' suffix series if military temperature range (-55°C to 125°C) is necessary instead of the commercial 'C' series.

Part Context

This component belongs to the TIBPAL16L/R series of IMPACT-X PAL circuits. It shares the same 20-pin footprint and logical array structure with variants like TIBPAL16R6 and TIBPAL16R8, differing primarily in the number of registered outputs available on the I/O ports.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Functionally equivalent devices may exist but require independent verification of pin compatibility and electrical specifications.