SN74LV8T165PWR

Shift Registers Overview

The SN74LV8T165 is an 8-bit parallel-load shift register from Texas Instruments. It operates on a single supply voltage ranging from 1.65 V to 5.5 V. The device features 5.5-V tolerant inputs and supports both up-translation (e.g., 1.2 V to 1.8 V) and down-translation (e.g., 5.0 V to 3.3 V). It includes latching logic with a known power-up state via a Power On Reset circuit. The package is available in TSSOP-16.

Shift Registers Feature Summary

• Integrated voltage level translation for interfacing between different CMOS logic families
• Latching logic with a defined power-on reset state to ensure predictable initialization
• Clock-inhibit function allowing flexible control over data shifting operations

Shift Registers Applications

• Expanding the number of inputs available to a microcontroller
• Converting parallel data streams into serial data for system controllers
• Interfacing low-voltage logic devices with higher-voltage systems

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as variants exist for TSSOP and WQFN. Confirm that the intended operating voltage range aligns with the device's 1.65 V to 5.5 V specification. Ensure input signal transition rates comply with recommended conditions to prevent excessive power consumption or oscillation during operation.

Shift Registers Selection Notes

Select this component when a design requires converting parallel inputs to a serial output stream while simultaneously performing voltage level translation. It is suitable for applications needing to interface lower voltage sources with higher voltage logic without external translators. Consider the clock frequency requirements against the specified timing characteristics at the target supply voltage.

Shift Registers Part Context

This device belongs to the LVxT family of logic ICs designed by Texas Instruments. The family specializes in single-supply voltage translation capabilities, allowing seamless communication between digital components operating at different voltage levels. These devices are commonly used in mixed-voltage embedded systems and industrial control interfaces.

Shift Registers Replacement Considerations

SN74LV8T165PW

Shift Registers FAQ

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

The SN74LV8T165 includes a Power On Reset (POR) circuit that sets all internal latching circuits to a known state during the power-up ramp, preventing undefined output states.

Can unused inputs be left floating?

No, unused inputs must not be left floating. They should be terminated at VCC or GND, typically using a pull-up or pull-down resistor, to ensure valid logic states and prevent excessive current draw.