TIBPAL20L8-15CNT

Overview

The TIBPAL20L8-15CNT is a high-performance IMPACT PAL circuit from Texas Instruments, characterized for operation between 0°C and 75°C. It features a maximum operating frequency of 45 MHz without feedback and a typical propagation delay of 15 ns from input to output. The device operates with a supply voltage ranging from 4.75 V to 5.25 V, drawing a maximum current of 180 mA. It utilizes titanium-tungsten fuses for reliable programming.

Feature Summary

• Combines Advanced Low-Power Schottky technology with titanium-tungsten fuses for high performance and reliability.
• Functionally equivalent but faster than standard PAL20L8 devices.
• Includes power-up clear capability on registered outputs to simplify state-machine initialization.
• Offers preload capability on output registers to facilitate testing by setting initial states.

Applications

• Custom logic design requiring compact circuit board implementation.
• State-machine initialization where power-up reset is required.
• Testing sequences utilizing register preload capabilities.
• High-speed digital logic substitution for conventional TTL circuits.

Procurement Notes

Verify the specific suffix 'CNT' against official documentation, as datasheets primarily list 'NT' or 'JT' for plastic DIP packages. Confirm that the component matches the commercial temperature range (0°C to 75°C) rather than the military grade (-55°C to 125°C). Ensure compatibility with existing programming hardware for titanium-tungsten fuse devices.

Selection Notes

Select this device when a fast, functionally equivalent replacement for PAL20L8 is needed within the commercial temperature range. Consider the registered variants (TIBPAL20R4/6/8) if synchronous output control or preload features are required. Verify package availability, as chip carriers and ceramic options also exist for space-constrained designs.

Part Context

This component belongs to the TIBPAL20 series of IMPACT PAL circuits, which include registered variants like TIBPAL20R4 and TIBPAL20R8. These devices share the same core architecture and fuse technology but differ in output configuration, offering either combinational or registered outputs with three-state buffers.

Replacement Considerations

The TIBPAL20L8-15C is functionally equivalent to but faster than the AMD PAL20L8. When substituting, ensure the replacement supports the required speed and temperature range. Registered versions may require additional clock and enable pin management not present in the L8 variant.