SN74HCT125D

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT125D is a quadruple bus buffer gate with 3-state outputs manufactured by Texas Instruments. It belongs to the HCT logic series and utilizes CMOS technology. The device operates within a supply voltage range of 4.5 V to 5.5 V. It features four non-inverting input lines and four corresponding output lines housed in an SOIC-14 package. Propagation delay is specified at 30 ns at 4.5 V and 32 ns at 5.5 V. Output drive capabilities include a low-level current of 6 mA and a high-level current of -6 mA. Static current is 8 uA, while operating supply current reaches 80 uA. The component supports surface mount installation and functions between -40°C and +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides quadruple bus buffering with independent control for each channel via dedicated enable inputs.
• Features 3-state outputs that allow connection to a common data bus without electrical interference when disabled.
• Compatible with standard TTL logic levels due to HCT series input characteristics.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and register implementations
• Clock drivers and buffered clock signals
• Bidirectional data bus transceivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific revision level and RoHS compliance status directly with the manufacturer or authorized distributors before procurement. Confirm that the SOIC-14 package dimensions match your PCB footprint requirements. Ensure the supply voltage provided to the circuit strictly adheres to the 4.5 V to 5.5 V operational limits to prevent device damage or malfunction. Check for any end-of-life notices or alternative part recommendations from Texas Instruments.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing 5 V systems with TTL-compatible logic sources requiring bus isolation. The HCT series ensures compatibility with older TTL standards while offering CMOS power advantages. Consider the propagation delay specifications if timing constraints are critical for your application. Evaluate the thermal performance within the specified operating temperature range during design.

Buffers, Drivers, Receivers, Transceivers Part Context

This part is part of the SNx4HCT125 family of quadruple bus buffers. It serves as a fundamental building block for digital logic designs requiring signal buffering and bus management. The device is widely used in microprocessor-based systems for data routing and isolation tasks.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT125DTG4 and SN74HCT125DRE4 are confirmed substitutes within the same product family offering identical functionality and pinout compatibility.