74VHC257

The 74VHC257 is an advanced high-speed CMOS QUAD 2 CHANNEL 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 74VHC257 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 is provided on all inputs and 0 to 7V can be 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 74VHC257 are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.