LT20A / LT30 Series
(E) 33
8-4. BCD input/output circuits
Output circuit
Input circuit
Counter unit
GND
OUT IN
+COM
–COM
74LS06
Counter unit
GND
OUT
IN
–COM
5 V
1 k
External power
supply:
DC +5 to +24 V
Externally connected device
(Connection Type)
Externally connected device
(Connection Type)
• Output specifications
NPN open collector output
DC+5 to +26.4 V 24 mA or less
• Input specifications
OFF voltage: +4 to +26.4 V or open
ON voltage : +0.8 V or less
Between IN and GND, either open (OFF) or short (ON) is
possible
Output signal rating
On: VOL = MAX. 1.4 V (when output current IOL = 10 mA)
Off: VOH = MAX. 26.4 V (output current IOH = MAX. 50 µA)