SN74HC251NSR集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

SN74HC251NSR属于集成电路（IC）的信号开关多路复用器解码器。由德州仪器制造生产的SN74HC251NSR信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。

1 Features

• 3-state version of ’HC151

• Wide operating voltage range of 2 V to 6 V

• High-current 3-state outputs interface directly with

system bus or can drive up to 15 LSTTL loads

• Low power consumption, 80-μA max ICC

• Typical tpd = 9 ns

• ±6-mA output drive at 5 V

• Low input current of 1 μA max

• Perform parallel-to-serial conversion

• Complementary outputs provide true and inverted

data

2 Description

The SNx4HC251 is a data selector/multiplexer

containing full binary decoding to select 1-

of-8 data sources and features strobe-controlled

complementary 3-state outputs.