SN74HCS139PW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

SN74HCS139PW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SN74HCS139PW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

• Wide operating voltage range: 2 V to 6 V

• Schmitt-trigger inputs allow for slow or noisy input

signals

• Low power consumption

– Typical ICC of 100 nA

– Typical input leakage current of ±100 nA

• ±7.8-mA output drive at 6 V

• Extended ambient temperature range: –40°C to

+125°C, TA

2 Applications

• Memory device selection with shared data bus

• Reduce required number of outputs for chip select

applications

• Route data

3 Description

The SN74HCS139 contains two two-to-four decoders

with one active low output strobe (G). When the

outputs of one channel are gated by the strobe input,

they are all forced into the high state. When the

outputs are not disabled by the strobe input, only the

selected output is low while all others are high.