Datasheet

Symbol Parameter Condition Min. Typ. Max. Units
V
OL
Output Low Voltage
(4)
except RESET pin
I
OL
= 20mA,
V
CC
= 5V
0.9 V
I
OL
= 10mA,
V
CC
= 3V
0.6
V
OH
Output HighVoltage
(3)
except Reset pin
I
OH
= -20mA,
V
CC
= 5V
4.2 V
I
OH
= -10mA,
V
CC
= 3V
2.3
IL
Input Leakage
Current I/O Pin
V
CC
= 5.5V, pin low
(absolute value)
1 μA
I
IH
Input Leakage
Current I/O Pin
V
CC
= 5.5V, pin high
(absolute value)
1 μA
R
RST
Reset Pull-up Resistor 30 60 kΩ
R
PU
I/O Pin Pull-up Resistor 20 50 kΩ
V
ACIO
Analog Comparator
Input Offset Voltage
V
CC
= 5V,
V
in
= V
CC
/2
<10 40 mV
I
ACLK
Analog Comparator
Input Leakage Current
V
CC
=5V
,
V
in
= V
CC
/2
-50 50 nA
t
ACID
Analog Comparator Propagation
Delay
V
CC
= 2.7V 750 ns
V
CC
= 4.0V 500
Note:
1. “Max.” means the highest value where the pin is guaranteed to be read as low.
2. “Min.” means the lowest value where the pin is guaranteed to be read as high.
3. Although each I/O port can sink more than the test conditions (20mA at V
CC
= 5V, 10mA at V
CC
=
3V) under steady state conditions (non-transient), the following must be observed:
3.1. The sum of all I
OL
, for ports PB0-PB7, XTAL2, PD0-PD7 should not exceed 100mA.
3.2. The sum of all I
OH
, for ports PA0-PA3, PC0-PC7 should not exceed 100mA.
If I
OL
exceeds the test condition, VOL may exceed the related specification. Pins are not
guaranteed to sink current greater than the listed test condition.
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
396