SN74LVTH126PWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVTH126PWR is a quad bus buffer featuring independent line drivers with three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 3.6 V and supports mixed-mode signal operation, allowing 5-V input and output voltages with 3.3-V VCC. The device utilizes BiCMOS technology and includes active bus-hold circuitry on data inputs to eliminate the need for external pullup or pulldown resistors. It provides Ioff and power-up three-state support for hot-insertion applications. The component is housed in a TSSOP-14 package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation with 5-V input and output voltages while operating at 3.3-V VCC
• Features active bus-hold circuitry on data inputs to maintain valid logic states without external resistors
• Provides Ioff and power-up three-state functionality to prevent damaging current backflow during hot insertion
• Offers high ESD protection exceeding JESD 22 standards for human-body, machine model, and charged-device model

Buffers, Drivers, Receivers, Transceivers Applications

• Mixed-mode signal buffering between 5-V systems and 3.3-V devices
• Hot-insertion applications requiring controlled power-up and power-down states
• Bus-oriented transmissions where unregulated battery operation down to 2.7 V is required

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-14 tape and reel packaging configuration. Confirm that the RoHS compliance status and lead finish match project requirements. Ensure the operating temperature range of -40°C to 85°C aligns with the environmental specifications of the target application. Cross-reference the manufacturer part number against the latest package addendum to confirm availability and material type.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing 5-V logic signals with 3.3-V low-voltage CMOS circuits. The integrated bus-hold feature simplifies design by removing the need for external pullup or pulldown resistors on data inputs. The three-state outputs allow multiple drivers to share a bus without conflict. Verify that the supply voltage remains within the 2.7 V to 3.6 V range for optimal performance and adherence to electrical characteristics.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74LVTH126 family of quad bus buffers from Texas Instruments. It is designed specifically for low-voltage 3.3-V VCC operation while providing TTL interface capabilities to 5-V system environments. The family shares common features such as active bus-hold circuitry and three-state outputs, but varies by package type and manufacturing revision. The LVTH series represents a BiCMOS technology optimized for speed and low power consumption.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVTH126PW (Tube version)

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle unused or undriven inputs?

The SN74LVTH126PWR features active bus-hold circuitry on its data inputs. This circuitry holds unused or undriven inputs at a valid logic state, eliminating the need for external pullup or pulldown resistors.

What is the function of the Ioff circuitry?

The Ioff circuitry disables the outputs when VCC is powered down or below 1.5 V. This prevents damaging current backflow through the device when it is in a powered-off state, supporting safe hot-insertion applications.

Can this device operate with unregulated battery supplies?

Yes, the device is designed to support unregulated battery operation down to a minimum supply voltage of 2.7 V.