74AHCT126S14-13

Overview

The 74AHCT126S14-13 is a quadruple 3-state buffer manufactured by Diodes Incorporated in the 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 with a separate active-high data enable pin that places the corresponding output in a high-impedance state when driven low. Electrical characteristics include an output current capability of 8mA at VCC = 4.5V and CMOS low power consumption.

Feature Summary

• Provides four independent non-inverting buffer gates with separate active-high data enable controls for each channel.
• Features Schmitt trigger action at all inputs to ensure clean signal transitions and noise immunity.
• Outputs are capable of sinking or sourcing 8mA at a supply voltage of 4.5V.
• Includes robust ESD protection exceeding specified JESD 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 ROMs
• TVs, DVDs, DVRs, and set-top boxes

Procurement Notes

Verify the specific package type required for the design, as the S14 suffix denotes the SO-14 footprint. Confirm that the operating environment stays within the recommended temperature range of -40°C to +125°C. Ensure the system power supply strictly adheres to the 4.5V to 5.5V limit to maintain valid logic levels. Check for any recent Product Change Notifications regarding manufacturing updates.

Selection Notes

Select this component when TTL-level compatibility is required alongside CMOS low power consumption. The inclusion of Schmitt triggers makes it suitable for noisy environments or slow-rise-time signals. Verify that the application requires separate enable control for each of the four channels rather than a global disable function.

Part Context

This part belongs to the 74AHCT126 family of quadruple 3-state buffers. It is specifically designed for 5V systems requiring high-speed performance with TTL input compatibility. The 'S14' designation identifies the surface-mount SO-14 package variant, while the '-13' indicates tape and reel packaging for automated assembly processes.

Replacement Considerations

The datasheet lists the 74AHCT126T14-13 as a direct alternative featuring the TSSOP-14 package instead of the SO-14 form factor. Both variants share identical electrical specifications and pin functions, allowing for potential board layout adjustments if space constraints differ between packages.

FAQ

What is the logic level of the enable pin?

The data enable (OE) pin is active high. Driving the OE pin with a low logic level places the corresponding output in the high-impedance state.

Does the device have Schmitt trigger inputs?

Yes, the 74AHCT126 includes Schmitt trigger action at all inputs to improve noise immunity and handle slower signal transitions.