TIBPAL16R8-5CN

Overview

The TIBPAL16R8-5CN is a high-performance PAL circuit from Texas Instruments, utilizing IMPACT-X technology for reliable TTL logic substitution. It features 8 inputs and 8 registered outputs with 3-state buffers in a 20-pin CDIP package. The device operates within a commercial temperature range of 0°C to 75°C at a nominal 5V supply. Key electrical specifications include a maximum propagation delay of 4 ns (CLK-to-Q) and a minimum fmax of 125 MHz without feedback. It includes power-up clear functionality and asynchronous preload capability for simplified testing.

Feature Summary

• High-speed performance with 125 MHz minimum fmax and 4 ns max CLK-to-Q propagation delay
• Asynchronous preload capability on output registers simplifies system testing
• Power-up clear feature resets all registered outputs to low upon initialization
• Security fuse prevents unauthorized duplication of the programmed logic

Applications

• High-performance state machine designs requiring external feedback
• Counter configurations utilizing internal feedback paths
• Replacement for conventional TTL logic in compact circuit boards

Procurement Notes

Verify the 'C' suffix indicates the commercial 0°C to 75°C operating range. Confirm the 'J' or 'N' package designation corresponds to the required ceramic or plastic DIP form factor. Ensure programming equipment supports the specific fuse map and preload voltage requirements outlined in the datasheet.

Selection Notes

Select this component when a registered PAL with 8 I/O lines and high-speed switching is required. The -5C series is suitable for commercial environments, whereas the -7M series is needed for military-grade -55°C to 125°C operation. Consider the 20-pin footprint compatibility if replacing legacy PLDs.

Part Context

This part belongs to the TIBPAL16R family, which also includes variants like TIBPAL16R4 and TIBPAL16R6. These devices share the same 20-pin pinout and IMPACT-X architecture but differ in the number of registered outputs. The family is designed as a functional equivalent to existing 20-pin PLDs with improved speed characteristics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.