Datasheet

332
ATmega169A/PA/329A/PA/649A/P/3290A/PA/6490A/P [DATASHEET]
8284E–AVR–02/2013
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 lin-
ear between 1.8V < V
CC
< 2.7 and between 2.7V < V
CC
< 4.5.
Figure 29-1. Maximum frequency vs. V
CC
, Atmel ATmega169A/169PA/ATmega649A/ATmega649P.
Figure 29-2. Maximum frequency vs. V
CC
(0 - 20MHz) Atmel
ATmega329A/ATmega329PA/ATmega3290A/ATmega3290PA/ATmega6490A/
ATmega6490P.
4MHz
1.8V 2.7V 4.5V
8MHz
16MHz
5.5V
Safe operating area
4MHz
1.8V 2.7V 4.5V
10MHz
20MHz
5.5V
Safe operating area