Examples Of How To Use The Open Collector Output (Pins 3-4) - Gorgy Timing LEDI NETWORK IN Mode D'emploi

Here are some examples of how to use this output :

5.2. Examples of how to use the open collector output (pins 3-4)

General case :
3
4
► You need to add R if the load (LED, loudspeaker,...) does not accept the VDC
voltage.
► To avoid the transistor destruction, limit the input current to 30 mA (i = Vdc / R <
30mA).
TTL input command :
3
4
WARNING : The open collector output is not compatible with an
extern power supply with a + pin connected to earth (telecom 48
Volts)..
98
loudspeaker
R
VDC
R
TTL input
+
External
WaRNING :
VDC max = 45 Volts
DC
-
Power
If VDC = 5 Volts :
Rmin =
0.03
so take
MDE-LEDI-NETWORK-IN-4065V1.0
5
= 167 Ω
R
≥ 180 Ω