TIBPAL20R8-7CFN

Overview

The TIBPAL20R8-7CFN is a high-performance PAL-type programmable logic device from Texas Instruments, utilizing IMPACT-X technology. It features 12 inputs and 8 registered outputs with 3-state buffers. The -7C suffix indicates an operating temperature range of 0°C to 75°C. Key electrical parameters include a maximum clock frequency (fmax) of 100 MHz without feedback and 74 MHz with external feedback. Propagation delay from CLK to Q is typically 4 ns, with a maximum of 6.5 ns under standard test conditions. The device operates at a nominal supply voltage of 5 V.

Feature Summary

• High-speed operation with fmax up to 100 MHz in no-feedback configurations
• Registered outputs with preload capability for simplified testing
• Power-up clear feature sets all registers to low level upon initialization
• Security fuse prevents circuit duplication

Applications

• High-speed state machine implementations
• Counter designs using internal feedback paths
• Bus interface circuits requiring registered 3-state outputs
• Custom logic replacement for conventional TTL families

Procurement Notes

Verify the specific ordering suffix 'FN' corresponds to the PLCC package type as indicated in the packaging data. Confirm that the -7C temperature grade meets the thermal requirements of the target application environment. Check current production status, as some variants within this family are listed as obsolete while others remain active.

Selection Notes

Select the TIBPAL20R8 variant specifically when eight registered outputs are required. Ensure the design utilizes the 12 available input lines efficiently. For military temperature ranges (-55°C to 125°C), consider the -10M series instead. Verify that the 3-state output enable timing aligns with system bus requirements.

Part Context

This component belongs to the TIBPAL20R' series of IMPACT-X PAL circuits. It is functionally equivalent to other 24-pin PLDs but offers improved speed characteristics. The device serves as a direct substitute for legacy TTL logic in compact board designs, leveraging titanium-tungsten fuse technology for reliability.

Replacement Considerations

Direct functional equivalents include the TIBPAL20R8-10M for extended temperature ranges. Cross-reference with 5962-8767118xx military-grade parts if higher reliability standards are required. Note that plastic DIP versions (CNT) share the same logical functionality but differ in physical package dimensions.