TIBPAL16R4-25CN

Overview

The TIBPAL16R4-25CN is a low-power high-performance IMPACT PAL programmable logic device in a 20-pin PDIP package. It features eight dedicated inputs, four registered outputs with three-state buffers, and two I/O ports. The C suffix indicates operation from 0°C to 75°C with a maximum propagation delay of 25 ns for combinational paths and 20 ns for clock-to-register transitions.

Feature Summary

• Combines Advanced Low-Power Schottky technology with titanium-tungsten fuses for reliable performance
• Registered outputs feature power-up clear functionality to simplify state-machine initialization
• Functionally equivalent to legacy PAL16R4A devices while offering improved speed characteristics

Applications

• High-speed custom logic function implementation
• State machine design and control
• Register file construction with output buffering
• System interface logic conversion

Procurement Notes

Verify the specific ordering suffix against current Texas Instruments documentation to confirm package type and temperature range. Confirm RoHS compliance status as manufacturing processes evolve. Check for lifetime buy availability or obsolescence notices prior to finalizing procurement plans for long-term production support.

Selection Notes

Select this component when a registered PAL architecture with three-state output capability is required. Ensure the application operates within the commercial temperature range of 0°C to 75°C. Verify that the 25 ns timing specifications meet the system clock requirements and that the 20-pin DIP footprint fits the target board layout constraints.

Part Context

This device belongs to the TIBPAL16 family of IMPACT PAL circuits manufactured by Texas Instruments. It serves as a direct replacement for older standard PAL16R4A logic components. The family includes various speed grades and package options, such as ceramic DIPs and chip carriers, to accommodate different environmental and space requirements.

Replacement Considerations

The TIBPAL16R4-25CN is functionally equivalent to the PAL16R4A. Designers should verify pin compatibility and electrical characteristics when substituting legacy parts. Alternative packages within the same functional family include the M suffix variants for military temperature ranges.