74AC11257PW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

74AC11257PW属于集成电路（IC）的信号开关多路复用器解码器。由美国德州仪器公司制造生产的74AC11257PW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。

3-State Outputs Interface Directly With

System Bus

Flow-Through Architecture Optimizes

PCB Layout

Center-Pin VCC and GND Configurations

Minimize High-Speed Switching Noise

500-mA Typical Latch-Up Immunity at

125°C

Provides Bus Interface From Multiple

Sources in High-Performance Systems

description/ordering information

This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized

systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.

To ensure the high-impedance state during power up or power down, OE 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.