Common DC Characteristics

Table 1. Common DC characteristics T_A = -40°C to 85°C, V_CC = 1.8V to 5.5V (unless otherwise noted)
Symbol	Parameter	Condition		Min.	Typ.	Max.	Units
V_IL	Input Low Voltage, except XTAL1 and RESET pin	V_CC = 1.8V - 2.4V		-0.5		0.2V_CC⁽¹⁾	V
V_IL	Input Low Voltage, except XTAL1 and RESET pin	V_CC = 2.4V - 5.5V		-0.5		0.3V_CC⁽¹⁾	V
V_IH	Input High Voltage, except XTAL1 and RESET pins	V_CC = 1.8V - 2.4V		0.7V_CC⁽²⁾		V_CC + 0.5	V
V_IH	Input High Voltage, except XTAL1 and RESET pins	V_CC = 2.4V - 5.5V		0.6V_CC⁽²⁾		V_CC + 0.5	V
V_IL1	Input Low Voltage,  XTAL1 pin	V_CC = 1.8V - 5.5V		-0.5		0.1V_CC⁽¹⁾	V
V_IH1	Input High Voltage,  XTAL1 pin	V_CC = 1.8V - 2.4V		0.8V_CC⁽²⁾		V_CC + 0.5	V
V_IH1	Input High Voltage,  XTAL1 pin	V_CC = 2.4V - 5.5V		0.7V_CC⁽²⁾		V_CC + 0.5	V
V_IL2	Input Low Voltage, RESET pin	V_CC = 1.8V - 5.5V		-0.5		0.1V_CC⁽¹⁾	V
V_IH2	Input High Voltage, RESET pin	V_CC = 1.8V - 5.5V		0.9V_CC⁽²⁾		V_CC + 0.5	V
V_IL3	Input Low Voltage,  RESET pin as I/O	V_CC = 1.8V - 2.4V		-0.5		0.2V_CC⁽¹⁾	V
V_IL3	Input Low Voltage,  RESET pin as I/O	V_CC = 2.4V - 5.5V		-0.5		0.3V_CC⁽¹⁾	V
V_IH3	Input High Voltage,  RESET pin as I/O	V_CC = 1.8V - 2.4V		0.7V_CC⁽²⁾		V_CC + 0.5	V
V_IH3	Input High Voltage,  RESET pin as I/O	V_CC = 2.4V - 5.5V		0.6V_CC⁽²⁾		V_CC + 0.5	V
V_OL	Output Low Voltage⁽⁴⁾ except RESET pin	I_OL = 20mA, V_CC = 5V	T_A=85°C			0.9	V
V_OL	Output Low Voltage⁽⁴⁾ except RESET pin	I_OL = 10mA, V_CC = 3V	T_A=85°C			0.6	V
V_OH	Output High Voltage⁽³⁾ except Reset pin	I_OH = -20mA, V_CC = 5V	T_A=85°C	4.2			V
V_OH	Output High Voltage⁽³⁾ except Reset pin	I_OH = -10mA, V_CC = 3V	T_A=85°C	2.3			V
I_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 V_CC = 4.0V			750 500		ns

Note:

“Max.” means the highest value where the pin is guaranteed to be read as low.
“Min.” means the lowest value where the pin is guaranteed to be read as high.
Although each I/O port can source 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: 
1. The sum of all I_OH, for ports C0 - C5, D0- D4, ADC7, RESET should not exceed 100mA. 
2. The sum of all I_OH, for ports B0 - B5, D5 - D7, ADC6, XTAL1, XTAL2 should not exceed 100mA. 
If II_OH exceeds the test condition, V_OH may exceed the related specification. Pins are not guaranteed to source current greater than the listed test condition.
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: 
1. The sum of all I_OL, for ports C0 - C5, ADC7, ADC6 should not exceed 100mA. 
2. The sum of all I_OL, for ports B0 - B5, D5 - D7, XTAL1, XTAL2 should not exceed 100mA. 
3. The sum of all I_OL, for ports D0 - D4, RESET should not exceed 100mA. 
If I_OL exceeds the test condition, V_OL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test condition.