74F299SJ

Overview

The Fairchild Semiconductor 74F299SJ is an 8-bit bidirectional parallel-in/parallel-out shift register belonging to the F/FAST series. It features synchronous operation with common I/O pins and a gated output control mechanism. The device supports a hold mode for data retention. It utilizes TTL logic levels and operates within a standard supply voltage range typical for this family. The component is housed in a 20-pin plastic dual in-line package (PDIP).

Feature Summary

• Bidirectional shifting capability with parallel load functionality.
• Common input/output pins reduce pin count requirements.
• Gated output control allows for bus sharing applications.

Applications

• Data storage buffers
• Parallel-to-serial conversion circuits
• Serial-to-parallel conversion interfaces

Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm package type and temperature rating. Ensure compatibility with existing TTL logic levels in the target design. Confirm availability status as legacy components may have limited production runs or require alternative sourcing strategies.

Selection Notes

Select this component when an 8-bit shift register with bidirectional capability and common I/O is required. Consider the F/FAST series speed characteristics relative to system timing constraints. Evaluate the need for three-state outputs if bus isolation is necessary for the application architecture.

Part Context

This part belongs to the 74F series of high-speed TTL logic devices. It shares functional similarities with other 8-bit shift registers like the 74F194 but offers distinct bidirectional and common I/O features. The F/FAST series provides faster switching speeds compared to standard 74LS equivalents while maintaining TTL compatibility.

Replacement Considerations

Check for direct pin-compatible substitutes such as the 74F299PC or equivalent parts from other manufacturers that maintain the same logical function and package outline. Verify electrical specifications match before substitution.