74F194SJ

Overview

The Fairchild Semiconductor 74F194SJ is a 4-bit bidirectional universal shift register belonging to the F/FAST logic series. It operates within a supply voltage range of 4.5V to 5.5V and features parallel-in parallel-out capabilities alongside serial shifting functions. The device utilizes true outputs and supports hold mode operations. It is housed in a 16-pin Small Outline Package (SOIC) with a width of 5.30mm, designed for surface-mount applications.

Feature Summary

• Supports bidirectional data shifting between left and right directions
• Enables parallel loading of data into all four bits simultaneously
• Includes dedicated control inputs for synchronous operation modes

Applications

• Data storage and buffering in digital systems
• Serial-to-parallel and parallel-to-serial data conversion
• Implementation of arithmetic logic units requiring shift operations

Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or its successor entity onsemi. Confirm the package designation matches the 16-SOIC specification with the correct pin pitch. Ensure the component meets RoHS compliance standards if required by your assembly process. Cross-reference the datasheet revision to confirm functional compatibility with existing designs.

Selection Notes

Select this component when a synchronous 4-bit bidirectional shift register with parallel load capability is required. The F/FAST series offers faster propagation delays compared to standard LS logic families. Ensure the design accommodates the 4.5V to 5.5V operating voltage range and the specific SOIC footprint constraints.

Part Context

This part belongs to the widely adopted 74xx logic family, specifically the high-speed F/FAST variant. It serves as a fundamental building block for sequential logic circuits. The 74F194SJ provides a compact solution for data movement tasks in embedded controllers and communication interfaces where speed and parallel access are prioritized over power consumption.

Replacement Considerations

Check for equivalents from other manufacturers such as SN74F194N or SN74F194SC. Verify pinout compatibility and electrical characteristics before substitution. Note that some variants may differ in package style or temperature rating.