74F676PC

Overview

The Fairchild Semiconductor 74F676PC is a 16-bit parallel-in serial-out shift register belonging to the 74F series. It operates with a supply voltage range of 4.5V to 5.5V and supports an operating temperature range of 0°C to 70°C. The device features tri-state outputs and utilizes a 24-pin DIP package (0.600 inch width). Key electrical characteristics include a propagation delay of 13.5 ns. It provides synchronous parallel or serial entry capabilities with serial output, designed for TTL logic compatibility.

Feature Summary

• Supports synchronous parallel data loading and serial output shifting
• Features tri-state outputs for bus line driving applications
• Includes hold mode functionality to maintain data states

Applications

• Parallel-to-serial data conversion systems
• Serial communication interface circuits
• Digital signal processing data buffering

Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm package integrity and pin alignment for the 24-DIP form factor. Ensure supply voltage matches 4.5V–5.5V requirements. Check for moisture sensitivity damage if stored long-term. Validate temperature ratings against operational environment constraints before integration.

Selection Notes

Select this component when 16-bit synchronous parallel-to-serial conversion is required within standard TTL logic families. Consider the 24-DIP package for through-hole prototyping or legacy board designs. Evaluate the 13.5 ns propagation delay against system timing budgets. Tri-state outputs facilitate connection to shared data buses without external gating components.

Part Context

This part belongs to the Fairchild 74F series of high-speed CMOS logic devices. The 74F676 specifically addresses data serialization needs in digital systems. It complements other 74F series logic gates by providing dedicated shift register functionality. The device represents a standard solution for managing parallel data streams in older microprocessor-based architectures.

Replacement Considerations

Check for direct equivalents from ON Semiconductor or other manufacturers offering 74F-series 16-bit shift registers. Verify pinout compatibility for the 24-DIP package. Ensure logical function and electrical specifications match exactly. Note that the original part status is obsolete; substitute parts must meet all functional and physical requirements.