I/O Pin Characteristics

Table 1. I/O Pin Characteristics (T_A=[-40, 105]°C, V_DD=[1.8, 5.5]V unless otherwise noted)
Symbol	Description	Condition	Min.	Typ.	Max.	Unit
V_IL	Input Low Voltage, except RESET pin as I/O		-0.2	-	0.3×V_DD	V
V_IH	Input High Voltage, except RESET pin as I/O		0.7×V_DD	-	V_DD+0.2V	V
I_IH / I_IL	I/O pin Input Leakage Current, except RESET pin as I/O	V_DD=5.5V, Pin high	-	< 0.05	-	µA
I_IH / I_IL	I/O pin Input Leakage Current, except RESET pin as I/O	V_DD=5.5V, Pin low	-	< 0.05	-	µA
V_OL	I/O pin drive strength	V_DD=1.8V, I_OL=1.5mA	-	-	0.36	V
		V_DD=3.0V, I_OL=7.5mA	-	-	0.6
		V_DD=5.0V, I_OL=15mA	-	-	1
V_OH	I/O pin drive strength	V_DD=1.8V, I_OH=1.5mA	1.44	-	-	V
		V_DD=3.0V, I_OH=7.5mA	2.4	-	-
		V_DD=5.0V, I_OH=15mA	4	-	-
I_total	Maximum combined I/O sink current per pin group⁽¹⁾		-	-	100	mA
I_total	Maximum combined I/O source current per pin group⁽¹⁾		-	-	100	mA
V_IL2	Input Low Voltage on RESET pin as I/O		-0.2	-	0.3×V_DD	V
V_IH2	Input High Voltage on RESET pin as I/O		0.7×V_DD	-	V_DD+0.2V	V
V_OL2	I/O pin sink current on RESET pin as I/O	V_DD=1.8V, I_OL=0.1mA	-	-	0.36	V
		V_DD=3.0V, I_OL=0.25mA	-	-	0.6
		V_DD=5.0V, I_OL=0.5mA	-	-	1
V_OH2	I/O pin source current on RESET pin as I/O	V_DD=1.8V, I_OH=0.1mA	1.44	-	-	V
		V_DD=3.0V, I_OH=0.25mA	2.4	-	-
		V_DD=5.0V, I_OH=0.5mA	4	-	-
t_RISE	Rise time	V_DD=3.0V, load=20pF	-	2.5	-	ns
t_RISE	Rise time	V_DD=5.0V, load=20pF	-	1.5	-	ns
t_FALL	Fall time	V_DD=3.0V, load=20pF	-	2.0	-	ns
t_FALL	Fall time	V_DD=5.0V, load=20pF	-	1.3	-	ns
C_pin	I/O pin capacitance except TOSC and TWI pins		-	3	-	pF
C_pin	I/O pin capacitance on TOSC pins		-	5.5	-	pF
C_pin	I/O pin capacitance on TWI pins		-	10	-	pF
R_p	Pull-up resistor		20	35	50	kΩ

Note:

Pin group A (PA[7:0]), pin group B (PB[7:0]). The combined continuous sink/source current for all I/O ports should not exceed the limits.