MC74HC126ANG

Overview

The MC74HC126ANG is a quad 3-state noninverting buffer manufactured by onsemi. It belongs to the HC126A logic series and utilizes high-performance silicon-gate CMOS technology. The device features four independent outputs with active-high output enables, allowing for precise bus-oriented control. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55°C to +125°C. The component is housed in a SOIC-14 package.

Feature Summary

• Provides four independent noninverting buffers with active-high output enables for bus-oriented systems
• Outputs directly interface with CMOS, NMOS, and TTL loads without additional components
• Features low input current and high noise immunity characteristic of CMOS devices
• Compatible with standard CMOS outputs and LSTTL outputs when pullup resistors are used

Applications

• Three-state memory address drivers
• Clock drivers
• Bus-oriented systems requiring signal isolation

Procurement Notes

Verify that the ordering suffix matches the required package type and shipping configuration. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the specific variant aligns with design requirements for voltage ranges and temperature specifications before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high-speed buffering with three-state capability. The active-high enable pin distinguishes it from similar parts with active-low enables. Verify compatibility with existing logic families and ensure power supply constraints fall within the specified 2.0 V to 6.0 V operational range for optimal performance.

Part Context

This part is part of the MC74HC125A/MC74HCT125A and MC74HC126A family. While electrically identical to the HC125A, the HC126A differs specifically in having active-high output enables compared to the active-low enables of the HC125A. Both share the same pinout as LS125 and LS126 equivalents.

Replacement Considerations

MC74HC125ADG

FAQ

What is the difference between MC74HC125A and MC74HC126A?

The primary difference is the output enable polarity. The MC74HC125A has active-low output enables, while the MC74HC126A has active-high output enables.

Is the MC74HC126A compatible with TTL outputs?

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