Audio Jack Schematic

We are using this audio jack in our design. I am having trouble understand the schematic of this audio jack. My understanding is that

1. Pin 5 and Pin 4 : Audio left and right
2. Pin 2 or Pin 3 : Ground or Mic
3. Pin 1: detect

Can anyone confirm my understanding? I think that the switch is normally open and pin 3 will short with pin 1 when the jack is inserted.

• Unless you want us to say something about the drawing or the footprint, perhaps you could crop the other 4/5 of the image out so we can read the schematic symbol with ease. – Samuel Jan 16 '14 at 7:28
• @Samuel Right click, select View Image from the context menu (I'm assuming that you're using Firefox). You'll get a larger image. – Nick Alexeev Jan 16 '14 at 7:41

I always use this standard here, that its the same the Nokia and Apple use:

With this schematic, I think that maybe the pins 2 and 3 can be shorted when the jack is inserted.

My interpretation of the circuit symbol is

• 1 = ground
• 2,3,4 = tip contacts
• 5 = switch, closed to 4 when NO plug is inserted

What the tip contacts are used for is not determined by the component but by convention and/or the exact device you want to use.