74HCT1G125GV,125

Overview

The Nexperia 74HCT1G125GV,125 is a single bus buffer and line driver featuring a three-state output. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device utilizes the HCT logic series, ensuring compatibility with TTL input levels. It is housed in a SC-74A (SOT753) plastic surface-mounted package with five leads. Key electrical characteristics include a propagation delay of up to 36 ns at 4.5 V and a power dissipation capacitance of 27 pF.

Feature Summary

• Provides a single non-inverting buffer function with high noise immunity and balanced propagation delays.
• Features a three-state output controlled by an active LOW enable input for effective bus driving applications.
• Includes input clamp diodes to allow interfacing with voltages exceeding the supply voltage using current limiting resistors.

Applications

• Bus-oriented transfers
• Clock buffering and distribution
• Memory and signal switching

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature rating. Confirm compliance with relevant environmental directives such as RoHS and REACH before finalizing procurement. Ensure the design accounts for the specified absolute maximum ratings to prevent permanent damage during operation or storage.

Selection Notes

Select this component when a single-channel buffer with three-state capability is required for 5 V logic systems. The HCT input levels ensure direct compatibility with TTL outputs. Consider the SC-74A package dimensions for PCB layout constraints and verify that the operating temperature range meets the application's thermal requirements.

Part Context

This part belongs to the Nexperia 74HCT1G family of single-function logic devices. These components are designed for low power consumption and high noise immunity in CMOS applications. The 74HCT1G125 specifically addresses needs for signal buffering where bus isolation and controlled drive strength are necessary in digital circuits.

Replacement Considerations

Check for equivalent parts within the same 74HCT logic family that offer identical pin configurations and electrical specifications. Verify that any substitute component maintains the same three-state functionality and package outline to ensure mechanical compatibility.

FAQ

What is the function of the OE pin?

The OE (Output Enable) pin controls the state of the output. When OE is LOW, the buffer is enabled and data passes from input A to output Y. When OE is HIGH, the output enters a high-impedance OFF-state.

Can this device interface with voltages higher than VCC?

Yes, the inputs include clamp diodes. This allows the use of current-limiting resistors to interface the inputs to voltages exceeding the supply voltage VCC.