74ABT126CSJX

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ABT126CSJX is a quad buffer and line driver featuring 3-state outputs, belonging to the ABT logic series. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes BiCMOS technology for high-speed performance. The device provides an output sink capability of 64 mA and a source capability of 32 mA. It is housed in a 14-lead Small Outline Integrated Circuit (SOIC) package with a narrow profile of 0.150 inches. The component supports non-destructive hot insertion and includes I_OFF circuitry to prevent damaging backflow currents during partial power-down applications.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Features four independent non-inverting buffers with 3-state outputs controlled by dedicated output enable inputs.
• Includes I_OFF circuitry that disables outputs to prevent potentially damaging backflow current when the device is powered down.
• Supports live insertion and extraction without causing bus contention or system damage.

Buffers, Drivers, Receivers, Transceivers Applications

• Driving bus lines in high-speed digital systems
• Memory and address drivers
• Clock distribution networks

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix CSJX against official Fairchild documentation to confirm the exact package dimensions and tape-and-reel specifications. Confirm RoHS compliance status and check for obsolescence notices from onsemi, as Fairchild's semiconductor division has been acquired. Ensure the ordering code matches the required lead-free and halogen-free attributes.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high drive strength and low static power dissipation. The ABT series offers superior speed compared to standard ALS logic while maintaining compatibility with TTL input levels. Verify that the 14-pin SOIC footprint fits the PCB layout constraints and that the thermal characteristics are suitable for the intended operating environment.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ABT family of high-performance BiCMOS logic devices. The 74ABT126 variant specifically functions as a quad buffer with 3-state outputs. Similar parts in the series include the 74ABT125, which shares similar electrical characteristics but may differ in pinout or control logic configuration. These devices are designed for demanding digital applications requiring fast switching speeds.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The NXP 74ABT126PW is a functionally equivalent quad buffer with 3-state outputs. Verify pin compatibility and ensure the replacement package (TSSOP vs SOIC) matches the board design requirements before substitution.