Unused Pins - Panasonic MN101L Series User Manual

Chapter 1
Overview
1.6.2

Unused Pins

Unused Pin (only for output)
Unconnect the unused output pin.
Unused Pin (only for input)
Pull-up (or down) the unused input pins with the resistor, the value of which is typically between 10 kΩ and 100
kΩ.
When the input voltage level 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 becomes noise sources to the internal
power supply.
Input
Pch
Input
Nch
I - 36 Cautions for Circuit Setup
Figure:1.6.1 Unused Pin (only for output)
Input pin
Figure:1.6.2 Unused Pin (only for input)
Input Pin
Structure of Input Inverter
Figure:1.6.3 Structure and Characteristics of Input Inverter
Output
OPEN
Input
Pull-up
resistor
Current
0
Input pin
Through Current
3
Characteristics of Input Inverter
Pull-down
resistor
Input voltage
(V =3 V)
DD30