SN74LV165APWT

Shift Registers Overview

The SN74LV165APWT is a parallel-load, 8-bit shift register from Texas Instruments designed for VCC operation between 2 V and 5.5 V. It features eight individual direct data inputs enabled by a low level at the shift/load (SH/LD) input. The device includes a clock-inhibit function and a complemented serial output, QH. It supports mixed-mode voltage operation on all ports and incorporates Ioff circuitry to disable outputs during partial-power-down mode, preventing damaging current backflow.

Shift Registers Feature Summary

• Supports mixed-mode voltage operation across all ports
• Includes Ioff circuitry for partial-power-down applications
• Features balanced CMOS push-pull outputs

Shift Registers Applications

• Increasing the number of inputs on a microcontroller

Shift Registers Procurement Notes

Verify that the ordering suffix 'PW' corresponds to the TSSOP-16 package as specified in the datasheet. Confirm the component status is production data rather than advanced information. Ensure the specific revision matches the required design specifications. Check RoHS compliance status before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when an 8-bit parallel-to-serial conversion is required within a 2 V to 5.5 V supply range. Consider the TSSOP-16 package constraints for PCB layout. Evaluate the maximum propagation delay requirements against the system clock speed. Verify that the input transition rates meet the recommended operating conditions to prevent oscillations.

Shift Registers Part Context

This part belongs to the SN74LV165A family of parallel-load 8-bit shift registers. The 'PW' suffix indicates a TSSOP-16 surface-mount package. The device is part of the broader SN74 logic series, providing standard digital logic functions compatible with various microcontroller interfaces.

Shift Registers Replacement Considerations

SN74LV165ADBR

Shift Registers FAQ

How does the SH/LD input control data loading?

Parallel loading is enabled when the SH/LD input is held low. When held high, parallel loading is inhibited, allowing serial shifting or no change depending on the clock state.

What is the function of the CLK INH pin?

The CLK INH pin serves as a clock inhibit input. Clocking occurs when CLK is low and CLK INH transitions from low to high, or vice versa if the functions are interchanged.