TIBPAL16R8-5CFN

Overview

The TIBPAL16R8-5CFN is a high-performance Impact-X PAL circuit from Texas Instruments, characterized for operation between 0°C and 75°C. It features eight inputs and eight registered outputs with three-state buffers. The device utilizes Advanced Low-Power Schottky technology and titanium-tungsten fuses. Key electrical parameters include a maximum propagation delay of 4 ns (CLK-to-Q) and a minimum frequency of 125 MHz without feedback. It operates on a 5 V supply with typical current consumption of 180 mA.

Feature Summary

• High-speed performance with 125 MHz minimum frequency and 4 ns max CLK-to-Q delay
• Registered outputs with asynchronous preload capability for simplified testing
• Power-up clear feature initializes all registers to low state upon power application
• Security fuse prevents unauthorized duplication of the programmed logic

Applications

• High-performance state machine designs requiring external feedback
• Counter configurations utilizing internal feedback paths
• Custom logic functions replacing conventional TTL logic arrays
• Systems requiring rapid design iteration via easy programmability

Procurement Notes

Verify the specific suffix 'FN' corresponds to the plastic chip carrier package when sourcing replacements. Confirm that the '-5C' speed grade meets the required timing constraints for the target application, as other variants like '-7M' offer different performance characteristics. Ensure programming equipment supports the titanium-tungsten fuse technology used in this IMPACT-X series.

Selection Notes

Select the TIBPAL16R8-5CFN when registered outputs are required for synchronous logic designs. Choose this part over the TIBPAL16L8 variant if output latching is necessary. Consider the thermal management requirements for simultaneous output switching at high frequencies. Verify that the 0°C to 75°C operating range aligns with the system's environmental conditions.

Part Context

This component belongs to the TIBPAL16R’-5C series within the IMPACT-X family. It is functionally equivalent but faster than existing 20-pin PLDs. The device shares pinouts with the PAL16R8 family but offers improved speed through Advanced Low-Power Schottky technology. It is covered by U.S. Patent 4,410,987.

Replacement Considerations

Public confirmed substitute part numbers: TIBPAL16R8-5CJ, TIBPAL16R8-5CN.