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