Datasheet

Figure 33-1. Maximum Frequency vs. V
CC
4MHz
1.8V 2.7V 4.5V
10MHz
20MHz
5.5V
Safe Operating Area
33.4 Clock Characteristics
Related Links
13.6 Calibrated Internal RC Oscillator
13.12.1 OSCCAL
33.4.1 Calibrated Internal RC Oscillator Accuracy
Table 33-6. Calibration Accuracy of Internal RC Oscillator
Frequency V
CC
Temperature Calibration Accuracy
Factory
Calibration
8.0 MHz 3.0V 25°C ±10%
User
Calibration
Fixed frequency within:
7.3 - 8.1 MHz
Fixed voltage within:
1.8V - 5.5V
Fixed temperature within:
-40°C to - 85°C
±1%
Related Links
13.12.1 OSCCAL
33.4.2 External Clock Drive Waveforms
Figure 33-2. External Clock Drive Waveforms
V
IL1
V
IH1
Related Links
13.12.1 OSCCAL
ATmega48PA/88PA/168PA
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002011A-page 389