SR5i Technical Manual
TSP095.doc Issue 1.0 – July 2004
©
Money Controls 2004. All rights reserved.
22. ccTalk Interface Circuits
22.1 Circuit 1 – ccTalk Standard Interface
This circuit uses an open-collector transistor to drive the data line and a diode protected
straight-through receiver.
Figure 18: Circuit 1, ccTalk Standard Interface
Typical Components
Diode
BAT54
Schottky Diode, low forward voltage drop.
NPN
BC846B
High gain, medium signal, NPN transistor.
PNP
BCW68
High gain, medium signal, PNP transistor.