# DC Characteristics

Table 1. TA = -40°C to 105°C, VCC = 2.7V to 5.5V (unless otherwise noted)
Symbol Parameter Condition Min. Typ. Max. Units
VIL Input Low Voltage, Except XTAL1 and RESET pin VCC = 2.7V - 5.5V -0.5   0.2VCC(1) V
VIL1 Input Low Voltage, XTAL1 pin VCC = 2.7V - 5.5V -0.5   0.1VCC(1) V
VIL2 Input Low Voltage, RESET pin VCC = 2.7V - 5.5V -0.5   0.1VCC(1) V
VIH Input High Voltage, Except XTAL1 and RESET pins VCC = 2.7V - 5.5V 0.6VCC(2)   VCC + 0.5 V
VIH1 Input High Voltage, XTAL1 pin VCC = 2.7V - 5.5V 0.8VCC(2)   VCC + 0.5 V
VIH2 Input High Voltage, RESET pin VCC = 2.7V - 5.5V 0.9VCC(2)   VCC + 0.5 V
VOL Output Low Voltage(3), Port B (except RESET) IOL =20 mA, VCC = 5V IOL =10 mA, VCC = 3V     0.8 0.6 V
VOH Output High Voltage(4), Port B (except RESET) IOH = -20 mA, VCC = 5V IOH = -10 mA, VCC = 3V 4.0 2.2     V
IIL Input Leakage Current I/O Pin       3 μA
IIH Input Leakage Current I/O Pin       3 μA
RRST Reset Pull-up Resistor   30   80
RPU I/O Pin Pull-up Resistor   20   50
VACIO Analog Comparator  Input Offset Voltage VCC = 5V

VIN = VCC/2

20 mV
IACLK Analog Comparator  Input Leakage Current VCC = 5V Vin = VCC/2 -50   50 nA
Note:
1. 1.“Max” means the highest value where the pin is ensured to be read as low
2. 2.“Min” means the lowest value where the pin is ensured to be read as high
3. 3.Although each I/O port can sink more than the test conditions (20mA at Vcc = 5V, 10mA at Vcc = 3V) under steady state conditions (non-transient), the following must be observed:  PDIP, TQFP, and QFN/MLF Package:
1. 3.1.The sum of all IOL, for all ports, should not exceed 300mA.
2. 3.2.The sum of all IOL, for ports C0 - C5 should not exceed 100mA.
3. 3.3.The sum of all IOL, for ports B0 - B7, C6, D0 - D7 and XTAL2, should not exceed 200mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not ensured to sink current greater than the listed test condition.
4. 4.Although each I/O port can source more than the test conditions (20mA at Vcc = 5V, 10mA at Vcc = 3V) under steady state conditions (nontransient), the following must be observed:  PDIP, TQFP, and QFN/MLF Package:
1. 4.1.The sum of all IOH, for all ports, should not exceed 300mA.
2. 4.2.The sum of all IOH, for port C0 - C5, should not exceed 100mA
3. 4.3.The sum of all IOH, for ports B0 - B7, C6, D0 - D7 and XTAL2, should not exceed 200mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not ensured to source current greater than the listed test condition.
Table 2. ATmega8A DC Characteristics.

TA = -40°C to 105°C, VCC = 1.8V to 5.5V (unless otherwise noted)

Symbol Parameter Condition Min. Typ. Max. Units
ICC Power Supply Current Active 4MHz, VCC = 3V     6 mA
Active 8MHz, VCC = 5V     15 mA
Idle 4MHz, VCC = 3V     3 mA
Idle 8MHz, VCC = 5V     8 mA
Power-Down mode(1) WDT enabled, VCC = 3V     35 μA
WDT disabled, VCC = 3V     6 μA
Note: 1. The current consumption values include input leakage current.