1. General description

The 74LV165A is an 8-bit parallel-load or serial-in shift register with complementary serial

outputs (Q7 and Q7) available from the last stage. When the parallel-load input (PL) is

LOW, parallel data from the inputs D0 to D7 are loaded into the register asynchronously.

When input PL is HIGH, data enters the register serially at the input DS. It shifts one place

to the right (Q0?? Q1?? Q2, etc.) with each positive-going clock transition. This feature

allows parallel-to-serial converter expansion by tying the output Q7 to the input DS of the

succeeding stage.

The clock input is a gate-OR structure which allows one input to be used as an active

LOW clock enable input (CE) input. The pin assignment for the inputs CP and CE is

arbitrary and can be reversed for layout convenience. The LOW-to-HIGH transition of the

input CE should only take place while CP HIGH for predictable operation.

Schmitt-trigger action at all inputs, makes the circuit tolerant for slower input rise and fall

times. It is fully specified for partial-power-down applications using IOFF. The IOFF circuitry

disables the output, preventing the damaging current backflow through the device when it

is powered down.

2. Features and benefits

? Wide supply voltage range from 2.0 V to 5.5 V

? Synchronous parallel-to-serial applications

? Synchronous serial input for easy expansion

? Latch-up performance exceeds 250 mA

? CMOS LOW power consumption

? 5.5 V tolerant inputs/outputs

? Direct interface with TTL levels (2.7 V to 3.6 V)

? Power-down mode

? Complies with JEDEC standards:

? JESD8-5 (2.3 V to 2.7 V)

? JESD8B/JESD36 (2.7 V to 3.6 V)

? JESD8-1A (4.5 V to 5.5 V)

? ESD protection:

? HBM JESD22-A114-A exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V

? Specified from ?40 ?C to +85 ?C

74LV165AD屬于集成電路（IC） > 移位寄存器。安世半導(dǎo)體(中國(guó))有限公司制造生產(chǎn)的74LV165AD移位寄存器移位寄存器是低級(jí)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(hào)形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動(dòng)數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個(gè)設(shè)備中的一組觸發(fā)器來(lái)實(shí)現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴(kuò)展等應(yīng)用，在這些應(yīng)用中離散形式的函數(shù)可能會(huì)非常有用。