74F299SCX

Overview

The Fairchild Semiconductor 74F299SCX is an octal, bidirectional parallel-in/parallel-out shift register belonging to the F/FAST series. It features TTL-compatible inputs and outputs with three-state capability for bus-oriented applications. The device includes a common clock input, data select control, and gated output enable functions. It is housed in a 20-pin SOIC package.

Feature Summary

• Bidirectional shift capability allowing data movement in both directions
• Three-state outputs suitable for direct connection to system buses
• Gated output enable function for controlled data transmission

Applications

• High-speed bidirectional data transfer between logic circuits
• Bus-oriented memory interface systems
• Parallel-to-serial or serial-to-parallel conversion tasks

Procurement Notes

Verify the specific suffix 'SCX' against current ON Semiconductor documentation to confirm package type and tape-and-reel specifications. Ensure RoHS compliance status matches project requirements by checking the latest datasheet revision. Confirm pinout compatibility if replacing legacy components from other manufacturers.

Selection Notes

Select this component when high-speed shifting operations are required alongside bus isolation capabilities. The F/FAST series offers performance comparable to standard bipolar TTL while maintaining CMOS power characteristics. Consider the bidirectional nature of the device for complex data routing architectures requiring reversible flow control.

Part Context

This part belongs to the 74F299 family of octal shift registers. It serves as a specialized variant within the broader 74-series logic ecosystem, designed for applications demanding faster switching speeds than standard LS logic families provide. The SCX designation typically indicates a surface-mount SOIC package configuration.

Replacement Considerations

Direct substitutes include the 74F299PCQR available from Rochester Electronics. Verify electrical parameters and package dimensions before substitution to ensure mechanical fit and signal integrity compatibility.