SN74LV8T165BQBR

Shift Registers Overview

The SN74LV8T165BQBR is an 8-bit parallel-load shift register from Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and supports data rates up to 150 Mbps at 3.3 V or 5 V. The device features LVxT enhanced input voltage thresholds for level translation, allowing inputs from lower voltages (e.g., 1.2 V) to be up-translated to higher outputs (e.g., 3.3 V). It includes latching logic with a known power-up state via a Power-On Reset circuit. The BQB suffix indicates a 16-pin WQFN package.

Shift Registers Feature Summary

• Integrated voltage level translation supporting both up-translation from low-voltage CMOS inputs and down-translation from 5.5 V tolerant inputs.
• Latching logic architecture equipped with a Power-On Reset circuit to ensure a defined output state upon initial power application.
• Balanced CMOS push-pull outputs capable of sourcing and sinking similar currents across the operating voltage range.

Shift Registers Applications

• Increasing the number of available inputs on a microcontroller by converting parallel signals to serial data.
• Translating signal levels between different CMOS voltage domains in mixed-voltage systems.
• Cascading multiple units to expand serial data input capacity for system controllers.

Shift Registers Procurement Notes

Verify that the ordering suffix matches the required package type, as the BQB suffix specifically denotes the WQFN configuration. Confirm that the design accounts for the specific thermal resistance values associated with this package style during layout. Ensure input signals comply with the recommended transition rates to prevent excessive power consumption or oscillation during operation.

Shift Registers Selection Notes

Select this component when simultaneous parallel loading and serial shifting are required alongside voltage level translation capabilities. It is suitable for designs needing a defined power-up state without external reset circuitry. Consider the WQFN package constraints if space is limited, while ensuring adequate thermal management for the junction-to-ambient resistance characteristics provided in the datasheet.

Shift Registers Part Context

This device belongs to the SN74LV8T series, which integrates shift register functionality with LVxT level-shifting technology. Unlike standard shift registers, it actively manages voltage threshold differences between input sources and the system supply. The family emphasizes robust performance in mixed-voltage environments where direct interfacing between disparate logic families would otherwise fail.

Shift Registers Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.