I am trying to understand the internal circuit schematic of the LM565 phase locked loop IC, on page 6 of this datasheet: PDF Datasheet for LM565 from TI website
In the upper middle, there is a strange little symbol labeled "Q13". Here is a screenshot: 
It looks like a PNP BJT, but I am not sure what it is exactly. Can anyone give
me a pointer.
Also, this schematics has quite a few BJT with unconnected pins. I assume that
this is when a BJT is used as a diode, but if someone could shed some light I'd appreciate it.
Best Answer
This is a multi collector transistor. More common is the multi emitter transistor used in TTL integrated circuits.