Datasheet

404
ATmega640/1280/1281/2560/2561
2549K–AVR–01/07
Figure 191. I/O Pin Output Voltage vs. Source Current (V
CC
= 5 V)
Pin Threshold and
Hysteresis
Figure 192. I/O Pin Input Threshold Voltage vs. V
CC
(V
IH
, IO Pin Read as “1“)
I/O PIN OUTPUT VOLTAGE vs. SOURCE CURRENT
V
CC
= 5V
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)
I/O PIN INPUT THRESHOLD VOLTAGE vs. V
CC
VIH, IO PIN READ AS '1'
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)
Threshold (V)