TIBPAL20R8-15CFN

Overview

The TIBPAL20R8-15CFN is a high-performance Impact PAL circuit from Texas Instruments, featuring 12 inputs and 8 registered outputs with 3-state buffers. It utilizes Advanced Low-Power Schottky technology and titanium-tungsten fuses for reliable operation within the commercial temperature range of 0°C to 75°C. The device operates at a nominal 5V supply voltage with a maximum clock frequency of 45 MHz. Key electrical characteristics include a typical propagation delay of 12 ns from input to output and 8 ns from clock to registered output, supporting complex logic designs with reduced power consumption.

Feature Summary

• Features 12 inputs and 8 registered outputs equipped with 3-state buffers for flexible interface control.
• Delivers high-speed performance with a maximum clock frequency of 45 MHz and typical propagation delays of 12 ns (input-to-output) and 8 ns (clock-to-Q).
• Includes power-up clear functionality that resets all registers to zero upon initialization.
• Supports preload capability on output registers to simplify system testing by allowing direct state setting.

Applications

• State machine implementation requiring synchronous logic and reset capabilities.
• High-speed digital signal processing interfaces utilizing registered I/O ports.
• Complex combinational logic replacement in compact board space designs.

Procurement Notes

Verify the FN package designation corresponds to the specific plastic DIP variant required for the target application. Confirm that the 0°C to 75°C operating temperature range meets environmental specifications. Ensure programming equipment supports titanium-tungsten fuse technology for this Impact PAL series.

Selection Notes

Select the TIBPAL20R8-15CFN when eight registered outputs with tri-state control are necessary. Choose this model over the M suffix variants if operation is restricted to the commercial temperature range. Consider the 15C speed grade for applications requiring up to 45 MHz clock speeds with standard TTL compatibility.

Part Context

This component belongs to the TIBPAL20 family of Impact PAL circuits, which includes variants like the TIBPAL20L8, TIBPAL20R4, and TIBPAL20R6. These devices serve as functional equivalents to older PAL20 series parts but offer improved speed and lower power consumption through Advanced Low-Power Schottky technology.

Replacement Considerations

Functionally equivalent to AMD PAL20R8 devices. Verify pinout compatibility and electrical parameters when substituting with other PAL20R8 derivatives or generic SPLD alternatives.