What voltage to supply VL pin on quad cmos switches

Thread Starter

Evan Cleary

Joined Nov 27, 2015
Im using DG444 quad cmos analog switches for a project, the pin out includes a VL pin for logic reference voltage with the absolute max ratings for the pin stating (GND - 0.3V) to (V+) + 0.3V.

Which is a little confusing, so if I supply 5V to V+ should I also route this to VL? Or should I tie VL to Gnd?

Is it just a case of one or the other will do?

The chip is going to be on a PCB with a ground plane

Data sheet


Joined Feb 24, 2006
GND and VL should match the voltage levels of the logic you are using to control the switches. V+ and V- can be anywhere withing their specified range.