SR3 Type 1 Technical Manual TSP005.doc Issue 5.0 – Jan 2005
Money Controls 2005. All rights reserved.
Page 42 of 50
25. ccTalk Interface Circuits
25.1 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 19: 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
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