74VHCT257A

The 74VHCT257A is an advanced high-speed CMOS QUAD2CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C²MOS technology.

It is composed of four independent 2 channel multiplexers with common SELECT and ENABLE INPUT.

The 74VHCT257A is a non inverting multiplexer. When the ENABLE INPUT is held"High",all outputs become high impedance state.If SELECT INPUT is held"Low","A"data is selected,when SELECT INPUT is"High","B"data is chosen.

Power down protection of the 74VHCT257A is provided on all inputs and output and 0 to 7V canbe accepted on inputs with no regard to the supply voltage.This device can be used to interface 5V to 3V.

All inputs and outputs of the 74VHCT257A are equipped with protection circuits against static discharge,giving them 2KV ESD immunity and transient excess voltage.