TIBPAL20R6-25CFN

Overview

The TIBPAL20R6-25CFN is a low-power, high-performance IMPACT PAL-type programmable logic device manufactured by Texas Instruments. It features an architecture with 12 inputs and 6 registered outputs equipped with 3-state buffers. The device operates on a nominal 5 V supply and supports a maximum clock frequency of 33 MHz without feedback. Propagation delay is specified at a maximum of 25 ns for input-to-output paths and 15 ns for clock-to-register transitions. It includes preload capability for output registers to simplify testing and provides power-up clear functionality where all register outputs initialize to a low level.

Feature Summary

• IMPACT PAL architecture with 12 inputs and 6 registered 3-state outputs
• Maximum propagation delay of 25 ns (input to output) and 15 ns (clock to Q)
• Preload capability allows asynchronous setting of output registers for test simplification
• Power-up clear feature resets all registers to zero upon initialization

Applications

• State machine implementation requiring registered outputs
• High-speed digital logic replacement for conventional TTL circuits
• Custom function design in compact circuit boards

Procurement Notes

Verify the component matches the specific 'CFN' package designation, which corresponds to the plastic DIP variant documented in the TIBPAL20L8/R4/R6/R8-25C datasheet. Confirm that the operating temperature range aligns with the C-series specification of 0°C to 75°C. Ensure programming equipment supports the titanium-tungsten fuse technology used in this IMPACT series.

Selection Notes

Select the TIBPAL20R6-25CFN when six registered outputs with 3-state control are required alongside twelve inputs. This model is suitable for designs needing a maximum clock frequency of 33 MHz and a propagation delay under 25 ns. Consider the preload feature if system testing requires initializing register states independently of the logic sequence.

Part Context

This component belongs to the TIBPAL20 family of low-power high-performance PAL circuits from Texas Instruments. It is functionally equivalent to standard PAL20R6A devices but offers reduced power consumption. The '25' suffix indicates the speed grade, while 'CFN' denotes the plastic DIP package option available for this series.

Replacement Considerations

The TIBPAL20R6-25CFN serves as a direct replacement for PAL20R6A devices, providing at least a 50% reduction in power consumption. Verify pin compatibility and electrical characteristics against legacy PAL20R6A specifications before substitution.