SN74HC126DBR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC126DBR is a quadruple bus buffer gate 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 significantly reducing power consumption 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 pin
• Balanced CMOS 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 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 specific reel or tube packaging needed for assembly processes. Ensure the component meets RoHS compliance standards if required by the manufacturing environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a quadruple buffer with controlled 3-state outputs is required for bus management. It is suitable for applications needing wide voltage operation between 2 V and 6 V. Consider the thermal resistance characteristics of the SSOP package for heat dissipation planning. Verify input signal transition times meet recommended conditions to avoid excessive current consumption.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC126 series of quadruple buffers with 3-state outputs. The 'SN' prefix indicates commercial grade performance, while 'HC' denotes High-speed CMOS technology. The 'DB' suffix specifically identifies the 14-pin Shrink Small Outline Package (SSOP) variant. Other variants in the series include SOIC, PDIP, and TSSOP packages.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers include SN74HC126DR (SOIC package), SN74HC126PWR (TSSOP package), and SN74HC126N (PDIP package). These alternatives share identical logical functionality but differ in physical package dimensions and mounting styles.