TIBPAL20R6-25CNT

Overview

The TIBPAL20R6-25CNT is a low-power, high-performance IMPACT PAL programmable array logic circuit manufactured by Texas Instruments. It features 12 inputs and 6 registered outputs with 3-state buffers. The device utilizes Advanced Low-Power Schottky technology and titanium-tungsten fuses for reliable operation. Key electrical parameters include a maximum propagation delay of 25 ns, a minimum clock frequency of 25 MHz with feedback, and a maximum supply current (ICC) of 105 mA at VCC = 5.25 V. It operates within a recommended supply voltage range of 4.75 V to 5.25 V and is characterized for an operating temperature range of 0°C to 75°C.

Feature Summary

• Direct replacement for PAL20R6A with over 50% power reduction
• Registered outputs with preload capability for simplified testing
• Power-up clear feature sets all registers to low level initially
• 3-state output buffers on all 6 registered outputs

Applications

• State machine implementations requiring synchronous output control
• Digital systems needing registered I/O expansion with bus driving capabilities
• Custom logic functions replacing conventional TTL logic in compact designs

Procurement Notes

Verify the 'CNT' suffix corresponds to the specific plastic DIP package variant as documented in the SRPS022 datasheet. Confirm RoHS compliance status if required, as this generation of IMPACT PALs may not meet modern environmental directives. Ensure programming equipment supports the titanium-tungsten fuse architecture specified for TI PAL devices.

Selection Notes

Select the TIBPAL20R6-25CNT when six registered outputs with 3-state buffering are required alongside twelve input lines. Choose this model over combinational variants like the TIBPAL20L8 if synchronous state storage is necessary. Verify that the 25 ns speed grade meets the system timing requirements, particularly regarding setup times before the clock edge.

Part Context

This component belongs to the TIBPAL20 series of IMPACT PAL circuits, which also includes the TIBPAL20L8, TIBPAL20R4, and TIBPAL20R8. These devices share the same 24-pin footprint and core architecture but differ in output configuration and registration. The series was designed to offer high performance while reducing power consumption compared to earlier PAL generations.

Replacement Considerations

Functionally equivalent to AMD AMPAL20R6A. When substituting, ensure the replacement device supports the same 3-state registered output configuration and 25 ns speed grade. Verify pin compatibility for the 24-pin DIP package.