SN74HC258中文资料具有三态输出的四路 2 线路到 1 线路数据选择器/多路复用器数据手册TI规格书

描述 Description

These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G\\) input is at a high logic level.

To ensure the high-impedance state during power up or power down, (G\\) should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

特性 Features

• Wide Operating Voltage Range of 2 V to 6 V
• High-Current Inverting Outputs Drive up to 15 LSTTL Loads
• Low Power Consumption, 80-µA Max ICC
• ’HC257 ...Typical tpd = 9 ns
• ’HC258 ...Typical tpd = 12 ns
• ±6-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Provides Bus Interface from Multiple Sources in High-Performance Systems

简介

SN74HC258属于集成电路（IC）的信号开关多路复用器解码器。由TI制造生产的SN74HC258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。