SN74HC126NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC126NSR 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 from -40°C to +85°C. The device features buffered inputs, balanced CMOS outputs capable of sinking and sourcing similar currents, and standard high-impedance CMOS inputs. It provides fanout support for up to 10 LSTTL loads while offering significant power reduction compared to LSTTL logic ICs.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Contains four independent buffers performing the Boolean function Y = A in positive logic
• Outputs can be placed into a high-impedance state via the Output Enable (OE) pin
• Balanced CMOS 3-state outputs allow for fast edges into light loads
• Standard CMOS inputs require fast edge rates to prevent oscillations

Buffers, Drivers, Receivers, Transceivers Applications

• Enabling digital signals on data buses
• Controlling 4-bit data bus connections
• Disabling circuitry connected to outputs to save system power

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package type matches the design requirements, as the SN74HC126 family includes SOIC, SSOP, PDIP, SO, TSSOP, CDIP, and LCCC options. Confirm that the ordering suffix corresponds to the desired reel or tube quantity and lead finish. Ensure the selected variant meets the required thermal resistance and operating temperature specifications for the target application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a quadruple buffer with controlled output enable functionality is required. It is suitable for applications needing to drive up to 10 LSTTL loads with reduced power consumption. Consider the NS package dimensions if space constraints exist. Ensure input signal edge rates comply with recommended operating conditions to avoid excessive current consumption.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SNx4HC126 series of quadruple buffers with 3-state outputs. It is part of the broader HC logic family, designed to provide high-speed performance with low power dissipation. The SN74HC126NSR specifically utilizes the SO (Small Outline) package format, distinguishing it from other variants like the D (SOIC), N (PDIP), or PW (TSSOP) packages available within the same functional family.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC126DR

Buffers, Drivers, Receivers, Transceivers FAQ

How are unused inputs handled?

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

What happens when the output is disabled?

When the output is disabled, it enters a high-impedance state where it neither sources nor sinks current, leaving the output voltage determined by the external circuit.