2. logic change, 3. bcd data hold, 4. equivalent circuit – FUTEK IPM600 (D610) Digital Display User Manual
Page 104: Logic change, Bcd data hold, Equivalent circuit
14.BCD DATA OUTPUT(OPTION)
93
14-2. Logic Change
Select the logic of output signals with pin No. 28.
When COM and pin No. 28 are open: negative logic
When they are short-circuited: positive logic
14-3. BCD Data Hold
The BCD data output signal is held. Switching is carried out by pin No. 27.
When COM and pin No. 27 are open: hold cancel
When they are short-circuited: hold on
14-4. Equivalent Circuit
Output
The signal output circuit is operated through a TTL open collector.
F371
Inside
Vcc
+5V
COM
Vext
Vceo=30V(max)
Ic =30mA (max)
Internal transistor status
Output data
Negative
Positive
0
OFF
ON
1
ON
OFF
Output pin level
Output data
Negative
Positive
0
1
Through logic switching pin28
Outside