TIBPAL20L8-15CFN

Overview

The TIBPAL20L8-15CFN is a high-performance PAL-type programmable logic device from Texas Instruments. It features 14 dedicated inputs and 6 I/O lines, providing 64 product terms for combinational logic implementation. The device utilizes Advanced Low-Power Schottky technology with titanium-tungsten fuses. It operates at a maximum frequency of 45 MHz without feedback and has a typical propagation delay of 15 ns. The 'C' suffix indicates an operating temperature range of 0°C to 75°C, while the 'FN' suffix denotes a 24-pin plastic flat package.

Feature Summary

• Combinatorial output architecture with 14 inputs and 6 I/O ports
• High-speed performance: 45 MHz max frequency (no feedback), 15 ns typical tpd
• Power-up clear feature sets all registers low upon initialization
• Functionally equivalent to PAL20L8 but with improved speed

Applications

• State machine implementations requiring fast combinational logic
• Address decoding and buffer control circuits
• Replacement for standard TTL logic in compact designs

Procurement Notes

Verify the package marking matches the FN suffix for the 24-pin plastic flat configuration. Confirm the temperature grade corresponds to the C suffix (0°C to 75°C). Ensure programming equipment supports the specific fuse structure and voltage requirements outlined in the datasheet for reliable configuration.

Selection Notes

Select this component when a purely combinational PAL solution is required with 14 inputs. The TIBPAL20L8-15CFN offers faster switching than legacy PAL20L8 devices. For registered outputs or different pin counts, consider the R4, R6, or R8 variants within the same series.

Part Context

This device belongs to the IMPACT PAL family, designed as high-performance substitutes for conventional TTL logic. The TIBPAL20L8 variant specifically provides combinatorial outputs, distinguishing it from the registered R4, R6, and R8 models which include D-flip-flops on their outputs.

Replacement Considerations

The TIBPAL20L8-15CFN is functionally equivalent to the AMD PAL20L8 but operates at higher speeds. When replacing legacy PAL20L8 parts, verify that the system timing margins accommodate the 15 ns propagation delay.