The MC74LCX257 is a high performance, quad 2−input multiplexer with 3−state outputs operating from a 2.3 to 3.6 V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5 V allows MC74LCX257 inputs to be safely driven from 5.0 V devices.

Features

• Designed for 2.3 to 3.6 V VCC Operation

• 5.0 V Tolerant − Interface Capability with 5.0 V TTL Logic

• Supports Live Insertion and Withdrawal

• IOFF Specification Guarantees High Impedance When VCC = 0 V

• LVTTL Compatible

• LVCMOS Compatible

• 24 mA Balanced Output Sink and Source Capability

• Near Zero Static Supply Current in All Three Logic States (10 A) Substantially Reduces System Power Requirements

• Latchup Performance Exceeds 500 mA

• ESD Performance: Human Body Model >2000 V Machine Model >200 V

• Pb−Free Packages are Available*

MC74LCX257属于集成电路（IC） > 信号开关，多路复用器，解码器。安森美半导体公司制造生产的MC74LCX257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。