Datasheet

351
8284D–AVR–6/11
ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P
29.3 Speed Grades
Maximum frequency is depending on V
CC.
As shown in Figure 29-1, the Maximum Frequency vs.
V
CC
curve is linear between 1.8V < V
CC
< 2.7 and between 2.7V < V
CC
< 4.5.
Figure 29-1. Maximum Frequency vs. V
CC
, ATmega169A/169PA/ATmega649A/ATmega649P
Figure 29-2. Maximum Frequency vs. V
CC
(0 - 20MHz)
ATmega329A/ATmega329PA/ATmega3290A/ATmega3290PA/ATmega6490A/
ATmega6490P
4 MHz
1.8V 2.7V 4.5V
8 MHz
16 MHz
5.5V
Safe Operating Area
4 MHz
1.8V 2.7V 4.5V
10 MHz
20 MHz
5.5V
Safe Operating Area