SN74HCT125DR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT125DR is a quadruple bus buffer gate with three-state outputs manufactured by Texas Instruments. It belongs to the HCT logic series, utilizing CMOS technology for low power consumption and high noise immunity. The device features four independent non-inverting channels, each equipped with an active-low output enable input. Designed for surface-mount applications, it operates within a supply voltage range of 4.5 V to 5.5 V. The component supports propagation delays of approximately 36 ns at 4.5 V and 32 ns at 5.5 V, ensuring reliable signal buffering in digital systems.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides four independent non-inverting buffer channels with dedicated control inputs
• Features three-state outputs allowing direct connection to bus structures
• Ensures TTL-compatible input levels through HCT logic family design

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and address drivers
• Clock buffers and timing circuits
• Bidirectional data bus transceivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the HCT logic family voltage compatibility aligns with the system's 5V logic standards. Ensure the SOIC-14 package dimensions match the designated PCB footprint constraints before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing between 5V CMOS devices and TTL-compatible logic families requiring bus isolation. The three-state capability makes it suitable for multiplexed data paths where multiple sources share a common line. Consider the propagation delay specifications against the system clock speed requirements to ensure signal integrity is maintained across the buffered channels.

Buffers, Drivers, Receivers, Transceivers Part Context

This part is a variant of the SN74HCT125 series, distinguished by its reel-packaged form factor intended for high-volume manufacturing. It shares functional equivalence with other HCT quad buffers but offers specific handling characteristics due to its tape-and-reel configuration. The device represents a standard solution for general-purpose digital buffering in industrial and consumer electronics.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT125D (Tube packaging)

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the output enable pin?

The output enable pin is active-low; driving it low activates the buffer outputs, while driving it high places the outputs in a high-impedance state.

Is the SN74HCT125DR compatible with 3.3V logic inputs?

No, the HCT series requires a minimum supply voltage of 4.5V and is designed to be compatible with standard 5V TTL logic levels, not 3.3V.