74VHC595D屬于集成電路（IC）的移位寄存器。由安世半導(dǎo)體(中國)有限公司制造生產(chǎn)的74VHC595D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。

1. General description

The 74VHC595; 74VHCT595 are high-speed Si-gate CMOS devices and are pin compatible with

Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7A.

The 74VHC595; 74VHCT595 are 8-stage serial shift registers with a storage register and 3-state

outputs. The shift registers have separate clocks.

Data is shifted on the positive-going transitions of the shift register clock input (SHCP). The data

in each register is transferred to the storage register on a positive-going transition of the storage

register clock input (STCP). If both clocks are connected together, the shift register will always be

one clock pulse ahead of the storage register.

The shift register has a serial input (DS) and a serial standard output (Q7S) for cascading. It is

also provided with asynchronous reset (active LOW) for all 8 shift register stages. The storage

register has 8 parallel 3-state bus driver outputs. Data in the storage register appears at the output

whenever the output enable input (OE) is LOW.

2. Features and benefits

? Balanced propagation delays

? All inputs have Schmitt-trigger action

? Inputs accept voltages higher than VCC

? Input levels:

? For 74VHC595: CMOS level

? For 74VHCT595: TTL level

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V

? CDM JESD22-C101E exceeds 1000 V

? Multiple package options

? Specified from -40 °C to +85 °C and from -40 °C to +125 °C

3. Applications

? Serial-to-parallel data conversion

? Remote control holding register