Oki MSM85C154HVS - Page 216

INPUT/OUTPUT PORTS
209
VCC
10kΩ
IB
VCC
P
100kΩ
OUT
CPU "1" OUT
Figure 5-13 Drive circuit for NPN transistor by level shifter
IB
VCC
OUT
CPU "0" OUT
Figure 5-14 PNP transistor direct connection drive circuit