SN74AHC594集成電路（IC）的移位寄存器規(guī)格書(shū)PDF中文資料

SN74AHC594屬于集成電路（IC）的移位寄存器。由德州儀器制造生產(chǎn)的SN74AHC594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。

1 Features

? AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: -40°C to +125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

? Available in wettable flank QFN (WBQA) package

? Operating range 2V to 5.5V VCC

? Low delay, 12ns (VCC = 5V, CL = 50pF)

? Latch-up performance exceeds 250mA

per JESD 17

2 Applications

? Increase the number of outputs on a

microcontroller

? Store up to 8 bits of data temporarily

3 Description

The SN74AHC594-Q1 is an 8-bit serial-in, parallelout

shift register that feeds an 8-bit D-type storage

register. Separate clocks (RCLK, SRCLK) and direct

overriding clear (RCLR, SRCLR) inputs are provided

on both the shift and storage registers. A serial (QH')

output is provided for cascading purposes.

Both the shift register (SRCLK) and storage register

(RCLK) clocks are positive edge triggered. If both

clocks are connected together, the shift register

always is one clock pulse ahead of the storage

register.