Panasonic MN101C77C - Manual (Page 47)

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Chapter 1 Overview
Precautions
1-6-2 Unused Pins
„ Unused Pins (only for input)
Insert 10 k
Ω
to 100 k
Ω
resistor to unused pins (only for input) for pull-up or pull-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.
Figure 1-6-1 Unused Pins (only for input)
Figure 1-6-2 Input Inverter Organization and Characteristics
10 k
Ω
to 100 k
Ω
Input
Input pin
Input
Input pin
10 k Ω to 100 k Ω
Input
Pch
Input pin
Nch
3 0 Input voltage
(V
DD =3 V)
Current
Through current
Input inverter characteristics Input inverter organization