SN74LV8T165QPWRQ1

Shift Registers Overview

The SN74LV8T165QPWRQ1 is an automotive-grade, parallel-load, 8-bit shift register from Texas Instruments. It operates on a single supply voltage ranging from 1.65 V to 5.5 V and features LVxT enhanced input voltage thresholds for level translation. The device supports up-translation from lower voltage CMOS inputs (e.g., 1.2 V to 1.8 V) and down-translation from 5.0 V or 3.3 V sources to lower output levels. It includes a clock-inhibit function, complementary serial outputs, and latching logic with a known power-up state via a Power-On Reset circuit.

Shift Registers Feature Summary

• Integrated LVxT technology enables bidirectional voltage level translation between various CMOS logic families without external components.
• Latching logic architecture incorporates a dedicated Power-On Reset circuit to ensure deterministic output states immediately upon power application.
• Balanced CMOS push-pull outputs provide symmetric sourcing and sinking capabilities while maintaining high impedance characteristics.

Shift Registers Applications

• Expanding the number of available digital inputs for microcontrollers in automotive systems
• Interfacing low-voltage sensors with higher-voltage processing units through up-translation
• Connecting standard 5-V or 3.3-V logic devices to 1.8-V or 2.5-V system buses via down-translation

Shift Registers Procurement Notes

Verify that the specific ordering suffix matches the required package type, as variations exist between TSSOP and WQFN configurations. Confirm AEC-Q100 qualification status is required for the target automotive application environment. Ensure the selected variant aligns with the specific thermal and mechanical constraints of the final assembly design.

Shift Registers Selection Notes

Select this component when bidirectional level shifting is required alongside data storage functionality within a single integrated circuit. The LVxT input structure allows compatibility with diverse input voltage standards, making it suitable for mixed-voltage automotive architectures. Consider the known power-up state feature if system initialization reliability is critical during power ramp cycles.

Shift Registers Part Context

This device belongs to the SN74LVxT-Q1 family of automotive logic ICs designed for robust performance in vehicle electronics. It complements other Texas Instruments shift registers and buffers by combining data retention with active voltage translation capabilities. The Q1 designation indicates compliance with automotive quality standards, ensuring suitability for demanding operational environments.

Shift Registers Replacement Considerations

SN74LV8T165-Q1

Shift Registers FAQ

How does the device handle unknown states after power is applied?

The SN74LV8T165QPWRQ1 includes a Power-On Reset (POR) circuit that forces all internal latching circuits to a defined state during the supply voltage ramp, preventing indeterminate output conditions.

Can this device translate signals from 5.0 V to 1.8 V?

Yes, the device supports down-translation. When powered by a 1.8 V supply, the 5.5 V tolerant inputs can accept 5.0 V signals and output corresponding 1.8 V logic levels.