74AHCT125S14-13

Overview

The 74AHCT125S14-13 is a quadruple 3-state buffer manufactured by Diodes Incorporated in an SO-14 package. It operates within a supply voltage range of 4.5V to 5.5V and features TTL-compatible inputs with Schmitt trigger action at all input pins. The device provides four independent non-inverting buffers, each equipped with a separate active-low data enable pin (OE) that places the corresponding output into a high-impedance state when driven high. Electrical characteristics specify outputs capable of sourcing or sinking 8mA at VCC = 4.5V, with low CMOS power consumption.

Feature Summary

• Provides four independent buffer gates with dedicated 3-state outputs controlled by separate active-low enable pins.
• Features Schmitt trigger action at all inputs to ensure clean signal transitions and noise immunity.
• Inputs are compatible with TTL voltage levels while maintaining CMOS low power consumption characteristics.
• Includes robust ESD protection exceeding JESD 22 standards for machine model, human body model, and charged device model.

Applications

• General purpose logic applications
• PCs, networking equipment, notebooks, and netbooks
• Computer peripherals, hard drives, and CD/DVD ROM drives
• TV, DVD, DVR, and set-top box systems

Procurement Notes

Verify the specific package type required for your design, as the 74AHCT125 series is available in both SO-14 and TSSOP-14 configurations. Confirm that the -13 suffix corresponds to the standard 2500-unit tape and reel packaging format. Ensure compatibility with RoHS 2 and halogen-free requirements if environmental compliance is mandatory for your manufacturing process.

Selection Notes

Select this component when TTL-level interface compatibility is required alongside CMOS efficiency. The inclusion of Schmitt triggers makes it suitable for noisy environments or slow-rise signals. Verify that the 4.5V to 5.5V operating range aligns with your system's power supply rails. Consider the separate enable pins for precise bus control and tri-state management in multi-driver configurations.

Part Context

This part belongs to the 74AHCT125 family of quadruple 3-state buffers produced by Diodes Incorporated. It is functionally equivalent to other manufacturers' AHCT125 devices but utilizes Diodes' specific manufacturing processes and packaging options. The S14 designation specifically identifies the SO-14 surface-mount package variant within this product line.

Replacement Considerations

Cross-reference with other AHCT125 variants from different manufacturers for pin-compatible replacements. Verify that substitute parts maintain the same 4.5V to 5.5V supply voltage range and 8mA output drive capability. Ensure any alternative also includes Schmitt trigger inputs if signal integrity is critical to your application.

FAQ

What is the function of the OE pin on the 74AHCT125?

The OE (Output Enable) pin is active-low. When driven high, it places the corresponding output into a high-impedance state, effectively disconnecting it from the circuit.

Does the 74AHCT125 have Schmitt trigger inputs?

Yes, the datasheet specifies that there is Schmitt trigger action at all inputs, which helps in cleaning up noisy signals.

What is the maximum output current for this device?

The outputs are capable of sourcing or sinking 8mA at a supply voltage of 4.5V.