
295
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
28.3
Speed Grades
Maximum frequency is depending on V
curve is linear between 1.8V < V
CC < 2.7V and between 2.7V < VCC < 4.5V.
Figure 28-1. Maximum frequency vs. V
CC, Atmel ATmega165A/165PA/ATmega645A/ATmega645P.
Figure 28-2. Maximum frequency vs. V
CC (10 - 20MHz) Atmel
ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA/ATmega6450A/
ATmega6450P.
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