TIBPAL20R8-25CNT

Overview

The TIBPAL20R8-25CNT is a low-power, high-performance IMPACT PAL programmable logic device featuring 12 inputs and 8 registered outputs with three-state buffers. It operates at a maximum propagation delay of 25 ns and supports clock frequencies up to 33 MHz without feedback. The device utilizes Advanced Low-Power Schottky technology, drawing a maximum supply current of 105 mA at 5 V. It is characterized for operation between 0°C and 75°C.

Feature Summary

• Direct replacement for legacy PAL20R4A devices with significantly reduced power consumption
• Registered outputs feature preload capability to simplify system testing and initialization
• Power-up clear function automatically resets all registers to a low state upon activation

Applications

• State machine implementation requiring synchronous output control
• High-speed digital logic substitution in industrial equipment
• Complex decoding circuits utilizing registered data paths
• System interface logic requiring specific power-up initialization states

Procurement Notes

Verify the component matches the exact suffix CNT for plastic DIP packaging. Confirm that the application environment remains within the specified 0°C to 75°C operating temperature range. Ensure programming equipment supports the titanium-tungsten fuse architecture used in this IMPACT series generation.

Selection Notes

Select this variant when eight registered outputs with three-state buffering are required. Choose this part over combinational variants like the TIBPAL20L8 if synchronous data storage is necessary. Verify that the 25 ns speed grade meets the timing constraints of the target clock frequency.

Part Context

This component belongs to Texas Instruments' IMPACT PAL family, designed as high-performance substitutes for conventional TTL logic. The series combines advanced semiconductor processes with reliable fuse technology to offer compact circuit board solutions for custom logic functions.

Replacement Considerations

Functionally equivalent to AMD AMPAL20R4A devices. Designers replacing older PAL20R4A components should verify that the improved power characteristics and preload features do not conflict with existing test sequences or power supply capabilities.