Plantronics MDA400 QD Series Analog Switch for Quick Disconnect (QD) Headsets

hello and welcome to easy projects a lot of you seem to like the chip chat video so here's another one for you and it'll be number four today we're going to talk about this chip it's an analog multiplexer / D multiplexer also sometimes called an analog switch and it is in many cases very similar to this which is a standard rotary switch and to those of you who might not know such a switch it's basically you have one common pin in the middle but you can solo wire to and when you rotate this you alternate between connecting this pin so for example this one the next time this one this one this one and so on this particular one has 12 pins and one common pin so it can make 11 clicks you can also get them with two common pins and then it will have six pins that will connect to this and six pins that will connect to the other this will switch both pins when you turn this and then you only get