Panasonic F77G, MN101C77C user manual Unused Pins only for input

Models: F77G MN101C77C

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Chapter 1 Overview

1-6-2 Unused Pins

„Unused Pins (only for input)

Insert 10 kto 100 kresistor 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.

 

Input pin

 

Input

 

10 kto 100 k

Input

10 kto 100 k

 

 

Input pin

Figure 1-6-1 Unused Pins (only for input)

Current

Pch

Input pin

Input

Nch

Through current

0

3 Input voltage

 

(VDD=3 V)

Input inverter organization

Input inverter characteristics

Figure 1-6-2 Input Inverter Organization and Characteristics

Precautions I - 29

Page 47
Image 47
Panasonic F77G, MN101C77C user manual Unused Pins only for input