Unipulse F340A - 8-2. Logic Switching; 8-3. Equivalent Circuit

8.BCD DATA OUTPUT
60
8-2. Logic Switching
The logic Switching function is used to switch between the signal output logics, positive
logic and negative logic. Pin 28 is used for this purpose.
When COM and pin 28 are left open, the negative logic is used. When COM and pin 28
are short-circuited, the positive logic is used.
8-3. Equivalent Circuit
・Output
The signal output circuit employs the TTL open collector output
F340A
Inside
Vcc
+5V
COM
Vext
Vceo=30V(max)
Ic =50mA (max)
● Internal transistor status
Output data Negative Positive
0OFFON
1ONOFF
● Output pin level
Output data Negative Positive
0
ＨＬ
1
ＬＨ
Through logic switching （pin 28）
outside