74AC377SC

Overview

The Fairchild Semiconductor 74AC377SC is an octal D-type flip-flop featuring clock enable functionality. It operates within a 1.5V to 5.5V supply range using SCR latch-up-resistant CMOS technology. The device provides true outputs and includes buffered positive-edge-triggered clocks. It supports bus-oriented applications with high drive capabilities, offering balanced propagation delays and noise immunity suitable for various digital logic systems.

Feature Summary

• Octal D-type flip-flops with clock enable control
• Buffered positive edge-triggered clock inputs
• True outputs with high drive current capability
• SCR latch-up resistant CMOS process design

Applications

• Bus-oriented data storage systems
• High-speed digital logic circuits
• Parallel data transfer interfaces
• Clock enable controlled memory registers

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor assets are managed by onsemi. Confirm package integrity and pin alignment for the SOIC-20 configuration. Ensure compliance with RoHS standards if required for the target application environment. Cross-reference datasheets from authorized distributors to confirm current production status and availability.

Selection Notes

Select this component when eight parallel flip-flops with independent clock enable signals are required. It is suitable for designs needing TTL-compatible inputs with low power consumption. Consider the 1.5V to 5.5V operating range for flexible voltage domain interfacing. Evaluate the 24mA output drive strength against load requirements for reliable signal transmission.

Part Context

This part belongs to the 74AC series of advanced CMOS logic devices. It complements other octal flip-flops like the 74AC374, which lacks clock enable features. The 74AC family offers speed comparable to bipolar FAST logic with significantly reduced power dissipation. It is designed for general-purpose digital applications requiring high performance and reliability.

Replacement Considerations

The 74ACT377SC serves as a compatible alternative with TTL-compatible input thresholds. Other octal D-type flip-flops such as the 74AC374 may be used if clock enable functionality is not required. Verify pinout compatibility and electrical characteristics before substitution.