MC74HC126ADG

Overview

The MC74HC126ADG is a quad bus buffer manufactured by onsemi, belonging to the HC logic series. It features four independent non-inverting buffers with three-state outputs controlled by high-level enable inputs. The device operates within a supply voltage range of 2.0 V to 6.0 V and utilizes a 14-pin SOIC package. Key electrical characteristics include a maximum static current of 4 µA and output drive capabilities of 7.8 mA for both high and low states. Propagation delays vary from 90 ns at 2 V to 15 ns at 6 V, ensuring reliable signal buffering in various digital systems.

Feature Summary

• Provides four independent non-inverting buffer channels with three-state output control
• Operates across a wide supply voltage range suitable for diverse power environments
• Features high noise immunity and low power dissipation typical of CMOS technology
• Compatible with standard logic families through pin and function alignment

Applications

• Three-state memory address drivers
• Clock signal distribution systems
• Bus-oriented digital architectures
• Signal isolation between circuit stages

Procurement Notes

Verify the specific suffix 'DG' against official onsemi documentation to confirm the exact package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing systems requiring quad buffering with active-high enable controls. It is suitable for applications needing compatibility with LS126 pinouts while offering improved speed over standard TTL equivalents. Consider the operating temperature range and supply voltage constraints to ensure proper functionality within the target circuit environment.

Part Context

This device is part of the broader 74HC family of high-speed CMOS logic devices produced by onsemi. It serves as a direct replacement or upgrade for legacy LS126 components in modern designs. The HC series is widely used in consumer electronics and industrial control systems due to its balance of speed, power efficiency, and interface compatibility.

Replacement Considerations

Direct substitutes include MC74HC126DTR2G and MM74HC126MX. Verify pinout compatibility and electrical parameters such as propagation delay and output current when transitioning between different manufacturers or package styles.