CD74HCT597屬于集成電路（IC）的移位寄存器。由美國德州儀器公司制造生產(chǎn)的CD74HCT597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(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。

特性 Features

? Buffered Inputs

? Asynchronous Parallel Load

? Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

? Wide Operating Temperature Range . . . -55oC to 125oC

? Balanced Propagation Delay and Transition Times

? Significant Power Reduction Compared to LSTTL

Logic ICs

? HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

? HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

描述 Description

The ’HC597 and CD74HCT597 are high-speed silicon gate

CMOS devices that are pin-compatible with the LSTTL 597

devices. Each device consists of an 8-flip-flop input register

and an 8-bit parallel-in/serial-in, serial-out shift register. Each

register is controlled by its own clock. A “l(fā)ow” on the parallel

load input (PL) shifts parallel stored data asynchronously into

the shift register. A “l(fā)ow” master input (MR) clears the shift

register. Serial input data can also be synchronously shifted

through the shift register when PL is high.