MC74HC126ADT

Overview

The MC74HC126ADT is a quad bus buffer featuring three-state outputs and non-inverting logic, manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V. The device provides an output current capability of 7.8 mA at both high and low states. Propagation delay varies from 90 ns at 2 V to 15 ns at 6 V. It utilizes a TSSOP-14 surface-mount package and supports operation temperatures from -55°C to +125°C.

Feature Summary

• Provides four independent non-inverting buffers with separate output enable controls for effective bus management.
• Features three-state outputs that allow direct connection to CMOS, NMOS, and TTL interfaces without external pull-up resistors.
• Designed for memory address drivers, clock drivers, and other bus-oriented systems requiring signal isolation.

Applications

• Memory address drivers in digital systems
• Clock distribution networks
• Bus-oriented system interconnects

Procurement Notes

Verify the specific suffix 'ADT' against official datasheets to confirm pinout and electrical characteristics match the standard HC126A series. Ensure the ordering code aligns with the required packaging format, such as tape-and-reel or cut tape, as availability may vary by distributor channel.

Selection Notes

Select this component when a wide operating voltage range between 2 V and 6 V is required for bus buffering applications. It is suitable for designs needing high noise immunity and compatibility with standard CMOS and LSTTL loads while maintaining low static power consumption.

Part Context

This part belongs to the MC74HC126A family of quad bus buffers. It shares pin compatibility with LS126 equivalents but offers improved performance through CMOS technology. The family is designed to replace older logic families in modern low-power digital circuits.

Replacement Considerations

Direct replacements include MC74HC126ADTR2G and MM74HC126MX. Verify package dimensions and lead finish compatibility before substitution.