MC74HC126ADR2G-Q

Overview

The MC74HC126ADR2G-Q is a quad 3-state noninverting buffer manufactured by onsemi. It belongs to the 74VHC/HC logic family and operates within a DC supply voltage range of 2.0 V to 6.0 V. The device features four independent outputs with active-high output enables, allowing for bus-oriented system applications such as memory address drivers and clock drivers. It is housed in a SOIC-14 package and complies with JEDEC standards.

Feature Summary

• Features four independent noninverting buffers with active-high output enables for precise signal control
• Provides high noise immunity characteristic of CMOS devices and direct interface capability to CMOS, NMOS, and TTL loads
• Includes automotive-grade qualification with AEC-Q100 certification and PPAP capability for unique site requirements

Applications

• Three-state memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify that the specific part number includes the -Q suffix to confirm automotive-grade manufacturing controls and AEC-Q100 qualification status. Ensure the ordering information matches the required SOIC-14 tape and reel packaging specifications. Confirm compliance with RoHS and halogen-free requirements before finalizing procurement documentation.

Selection Notes

Select this component when an active-high enable signal is required for bus isolation or buffering. The HC series offers a wide operating voltage range suitable for various power environments. Verify input compatibility with standard CMOS outputs and ensure the application does not require the active-low enable functionality found in the MC74HC125A variant.

Part Context

This device is part of the MC74HC125A/MC74HCT125A and MC74HC126A family. While electrically identical to the MC74HC126A, the -Q suffix indicates it meets specific automotive quality standards and production site controls. It shares pinout compatibility with LS125 and LS126 devices.

Replacement Considerations

MC74HC126ADR2G

FAQ

What is the logic function of the output enable pin?

The MC74HC126ADR2G utilizes active-high output enables. When the enable input is high, the buffer is active; when low, the output enters a high-impedance state.

Is this device compatible with LSTTL outputs?

Yes, the inputs are compatible with standard CMOS outputs and can interface with LSTTL outputs when pullup resistors are used.