MC74VHC257DR2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

MC74VHC257DR2属于集成电路（IC）的信号开关多路复用器解码器。由安森美半导体公司制造生产的MC74VHC257DR2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。

The MC74VHC257 is an advanced high speed CMOS quad 2--channel multiplexer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation.

The inputs tolerate voltages up to 7 V, allowing the interface of 5 V systems to 3 V systems.

• High Speed: tPD = 4.1 ns (Typ) at VCC = 5.0 V

• Low Power Dissipation: ICC = 4.0 μA (Max) at TA = 25°C

• High Noise Immunity: VNIH = VNIL = 28 VCC

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2.0 V to 5.5 V Operating Range

• Low Noise: VOLP = 0.8 V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300 mA

• ESD Performance: HBM > 2000 V; Machine Model > 200 V

• Chip Complexity: FETs = 100; Equivalent Gates = 25

• These devices are available in Pb--free package(s). Specifications herein apply to both standard and Pb--free devices. Please see our website at www.onsemi.com for specific Pb--free orderable part numbers, or contact your local ON Semiconductor sales office or representative.