TIBPAL20R4-20MJTB

Overview

The TIBPAL20R4-20MJTB is a high-performance IMPACT PAL circuit from Texas Instruments, characterized for the full military temperature range of -55°C to 125°C. It features 12 inputs and four registered outputs with three-state buffers. The device operates at a maximum clock frequency of 41.6 MHz with a typical propagation delay of 15 ns from CLK to Q. It utilizes titanium-tungsten fuses for programming and includes power-up clear functionality for registers. The supply voltage ranges from 4.5 V to 5.5 V, with a maximum operating current of 180 mA.

Feature Summary

• Military-grade operation over -55°C to 125°C
• Four registered outputs with three-state capability
• Maximum clock frequency of 41.6 MHz
• Power-up clear on all register outputs

Applications

• State machine initialization
• High-speed logic replacement
• Military system timing control

Procurement Notes

Verify the specific ordering suffix JTB corresponds to the ceramic dual in-line package (CDIP) with 24 pins. Confirm RoHS compliance status as military variants may differ from commercial standards. Check for active production status or obsolescence notices prior to procurement.

Selection Notes

Select this model when military temperature ratings are required alongside registered output functionality. Ensure the design accommodates the 4.5 V to 5.5 V supply range. Verify that the four registered outputs meet the logic density requirements compared to combinatorial alternatives like the TIBPAL20L8.

Part Context

This component belongs to the TIBPAL20 series of simple programmable logic devices. It serves as a functional equivalent but faster alternative to standard PAL20R4 devices. The 'M' suffix denotes the extended temperature range suitable for harsh environments.

Replacement Considerations

Functionally equivalent to AMD AMPAL20R4. Verify pin compatibility and electrical characteristics against legacy PAL20R4 designs before substitution.