Panasonic MN103S User Manual page 455

Unused Pin (Only for Input)
Insert some 10 kΩ resistor to unused pins (only for input) to pull up or down.
If the input is unstable, Pch transistor and Nch transistor of input inverter are on, and through current goes to the
input circuit. That increases current consumption and causes power supply noise.
Input
Pch
Input
Nch
Input Inverter Organization
Figure:16.1.3 Input Inverter Organization and Characteristics
some10 kΩ
Input pin
Figure:16.1.2 Unused Pins (Only for Input)
Input pin
Input pin
Input
Current
0
Input Inverter Characteristics
some 10 kΩ
Through Current
5
Input Voltage
(V =5 V)
DD
Cautions for Circuit Setup
Chapter 16
Appendix
XVI - 3