Datasheet

399
2549O–AVR–05/12
ATmega640/1280/1281/2560/2561
Figure 32-25. I/O Pin Output Voltage vs. Source Current (V
CC
= 5V)
32.8 Pin Threshold and Hysteresis
Figure 32-26. I/O Pin Input Threshold Voltage vs. V
CC
(V
IH
, IO Pin Read as “1“)
85°C
25°C
-40°C
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5
5.1
0 5 10 15 20 25
I
OH
(mA)
V
OH
(V)
85°C
25°C
-40°C
0
0.5
1
1.5
2
2.5
3
3.5
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V
CC
(V)
Thresh o l d (V)