74F194PC

Overview

The Fairchild Semiconductor 74F194PC is a high-speed, 4-bit bidirectional universal shift register belonging to the F/FAST logic series. It operates in a TTL-compatible environment and is housed in a 16-pin Plastic Dual-In-Line (PDIP) package with a standard 0.300-inch width. The device supports parallel-in parallel-out data transfer modes and features true outputs. It is designed for sequential building block applications requiring versatile data movement capabilities.

Feature Summary

• Supports bidirectional shifting operations including serial-serial, shift left, shift right, serial-parallel, parallel-serial, and parallel-parallel data transfers.
• Includes an asynchronous master reset function to clear internal states independently of the clock signal.
• Provides a hold mode capability that maintains current output states without alteration during specific control conditions.

Applications

• Serial-to-parallel and parallel-to-serial data conversion circuits
• Bidirectional data buffering and temporary storage registers
• Sequential logic systems requiring synchronous data transfer

Procurement Notes

Verify the component matches the original Fairchild Semiconductor manufacturing specifications before integration. Confirm the PDIP-16 package dimensions and pinout alignment with existing board layouts. Ensure the logic family compatibility aligns with the target system voltage levels. Validate that the asynchronous reset and hold functionalities meet the design requirements.

Selection Notes

Select this component when a high-speed, multifunctional sequential building block is required for bidirectional data handling. The F/FAST series offers speed advantages over standard logic families while maintaining TTL compatibility. The 4-bit capacity suits applications needing moderate data width without excessive pin count overhead.

Part Context

This part belongs to the 74F194 family of universal shift registers produced by Fairchild Semiconductor. The 'PC' suffix denotes the 16-lead Plastic Dual-In-Line Package variant. It shares functional characteristics with other 74F series devices but is distinct from CMOS or ACT logic families regarding power consumption and drive strength.

Replacement Considerations

Cross-reference with other 74F194 variants from different manufacturers ensuring identical pinouts and electrical characteristics. Verify package compatibility if substituting with surface-mount versions like the SCQR variant.