SN74LV165APWRE4

Shift Registers Overview

The SN74LV165APWRE4 is a parallel-load, 8-bit shift register from the Texas Instruments SN74LV165A family. It operates on a supply voltage (VCC) ranging from 2 V to 5.5 V and supports mixed-mode voltage operation across all ports. The device features eight direct data inputs enabled by a low level at the shift/load (SH/LD) pin. Data shifts toward the serial output QH when clocked with SH/LD held high and CLK INH held low. It includes a clock-inhibit function and complemented serial output.

Shift Registers Feature Summary

• Supports partial-power-down mode operation via Ioff circuitry that disables outputs to prevent damaging current backflow.
• Features balanced CMOS push-pull outputs capable of sinking and sourcing similar currents for bus interface applications.
• Includes latch-up performance exceeding 250 mA per JESD 17 specification.

Shift Registers Applications

• Increasing the number of inputs available to a microcontroller
• Bus interface type applications requiring minimized overshoot and undershoot
• Input expansion systems utilizing peripheral data loading gates

Shift Registers Procurement Notes

Verify the specific ordering suffix 'PWRE4' against the manufacturer's official orderable addendum to confirm package type and tape-and-reel configuration. Ensure the component meets RoHS3 compliance standards as indicated in the datasheet specifications. Confirm availability status directly through authorized distribution channels prior to procurement planning.

Shift Registers Selection Notes

Select this component for designs requiring parallel-to-serial conversion within a 2 V to 5.5 V operating range. Consider the TSSOP-16 package dimensions if space constraints apply. Evaluate the maximum propagation delay requirements against system timing budgets. Verify that input transition rates meet the recommended conditions to prevent oscillation or excessive power consumption during operation.

Shift Registers Part Context

This part belongs to the SN74LV165A series of parallel-load 8-bit shift registers manufactured by Texas Instruments. The LV designation indicates Low-Voltage CMOS technology compatible with various logic families. The RE4 suffix typically denotes environmental compliance and packaging format variations within the standard product line.

Shift Registers Replacement Considerations

Consult the SN74LV165A datasheet orderable addendum for verified substitute part numbers sharing identical electrical characteristics and pinouts. Cross-reference package options such as SOIC, SSOP, or TVSOP if physical footprint modifications are permissible in the design.

Shift Registers FAQ

How does the device handle partial-power-down scenarios?

The device utilizes Ioff circuitry to disable all outputs when the supply pin is held at 0 V, preventing damaging current backflow regardless of applied input voltages.

What is the function of the SH/LD input?

The shift/load (SH/LD) input enables parallel access to each stage when held at a low level; holding it high inhibits parallel loading and allows shifting operations.