In many tutorials (e.g. http://playground.arduino.cc/learning/4051 or http://bildr.org/2011/02/cd74hc4067-arduino/) it is recommended to connect the multiplexer's enable pin to ground. So the IC is "switched on". When set to high all channels are disabled.
Is the enable pin only for controlling the channels together or has it something to do with power saving? Background of this questions: I want to use four 16 channel multiplexer on an battery powered project. Atm the circuit is designed with enable to gnd. I need the multiplexer only in the daytime so does it have any influence respective power consumption to switch enable high vs to ground at night, when I do not need any channel? Or is the enable pin only an additional switch to control / disable all channels together and not a general on/off switch for the chip?