1 Features

? 2 V to 5.5 V VCC operation

? Maximum tpd of 10.5 ns at 5 V

? Support mixed-mode voltage operation on

all ports

? Ioff supports partial-power-down mode

operation

? Latch-up performance exceeds 250 mA per

JESD 17

2 Applications

? Increase the Number of Inputs on a Microcontroller

3 Description

The SN74LV165A device is a parallel-load, 8-bit shift

registers designed for 2 V to 5.5 V VCC operation.

When the device is clocked, data is shifted toward the

serial output QH. Parallel-in access to each stage is

provided by eight individual direct data inputs that are

enabled by a low level at the shift/load (SH/ LD) input.

The ’LV165A devices feature a clock-inhibit function

and a complemented serial output, Q H.

This device is fully specified for partial-power-down

applications using Ioff. The Ioff circuitry disables

the outputs, preventing damaging current backflow

through the devices when they are powered down.

SN74LV165A屬于集成電路（IC） > 移位寄存器。美國德州儀器公司制造生產(chǎn)的SN74LV165A移位寄存器移位寄存器是低級邏輯器件，通常用于在串行和并行方式之間轉(zhuǎn)換數(shù)字邏輯信號形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個設(shè)備中的一組觸發(fā)器來實現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴展等應(yīng)用，在這些應(yīng)用中離散形式的函數(shù)可能會非常有用。