Atmel ATmega48A Manual page 451

30.5.11 Internal Oscillator Speed
8271D–AVR–05/11
ATmega48A/PA/88A/PA/168A/PA/328/P
Figure 30-223.ATmega168A: Watchdog Oscillator Frequency vs. Temperature
121
119
117
115
113
111
-40 -30 -20
Figure 30-224.ATmega168A: Watchdog Oscillator Frequency vs. V
122
120
118
116
114
112
110
1.5 2
-10 0 10 20 30
Temperature (°C)
2.5 3 3.5
V (V)
CC
40 50 60 70 80
CC
4 4.5 5
2.7 V
3.3 V
5.5 V
90
-40 °C
25 °C
85 °C
5.5
451