SN74HC126D

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC126D is a quadruple buffer with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to +85°C. The device provides buffered inputs, supports fanout up to 10 LSTTL loads, and offers significant power reduction compared to LSTTL logic ICs. It is housed in a 14-pin SOIC package measuring 8.70 mm × 3.90 mm.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Contains four independent buffers with 3-state outputs performing the Boolean function Y = A
• Features balanced CMOS 3-state outputs capable of sinking and sourcing similar currents
• Utilizes standard CMOS inputs that are high impedance and modeled as a resistor in parallel with input capacitance
• Includes positive and negative clamping diodes on all inputs and outputs

Buffers, Drivers, Receivers, Transceivers Applications

• Enabling digital signals
• Controlling a 4-bit data bus
• Disabling circuitry connected to the output for extended periods to save system power

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current orderable addendum to confirm package type, lead finish, and production status. Ensure compatibility with RoHS requirements and moisture sensitivity levels relevant to your assembly process. Cross-reference thermal metrics such as junction-to-ambient resistance for your specific PCB layout conditions.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a quadruple non-inverting buffer with tri-state control is required. Verify that the application load capacitance remains within recommended limits to maintain switching performance. Ensure unused inputs are terminated to VCC or ground to prevent undefined operational states and excessive current consumption.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SNx4HC126 family of quadruple buffers with 3-state outputs. It is part of the broader 74HC series of HCMOS logic devices designed for low power consumption and wide voltage operation. The 'D' suffix specifically denotes the 14-pin Small Outline Integrated Circuit (SOIC) package variant.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC126DR

Buffers, Drivers, Receivers, Transceivers FAQ

How should unused inputs be handled?

Unused inputs must not be left floating; they should be terminated at either VCC or ground to prevent undefined operational states.

What is the Boolean function performed by each gate?

Each gate performs the Boolean function Y = A in positive logic.