12.1 DC and AC Characteristics

Table 12-1. DC Characteristics
Symbol	Parameter	Test Condition	Min.	Max.	Units
V_CC	Supply Voltage		2.7	3.6	V
I_CC	Supply Current (V_CC = 3.3V)	Async Read at 3.57 MHz		5	mA
I_CC	Supply Current (V_CC = 3.3V)	Async Write at 3.57 MHz		5	mA
I_CC	Supply Current (V_CC = 3.3V)	Synch Read at 1 MHz		5	mA
I_CC	Supply Current (V_CC = 3.3V)	Synch Write at 1 MHz		5	mA
I_SB	Standby Current (V_CC = 3.3V)	V_IN = V_CC or GND		100	μA
V_IL	SDA/IO Input Low Voltage		0	V_CC x 0.2	V
V_IL	CLK Input Low Voltage		0	V_CC x 0.2	V
V_IL	RST Input Low Voltage		0	V_CC x 0.2	V
V_IH⁽³⁾	SDA/IO Input High Voltage		V_CC x 0.7	5.5	V
V_IH⁽³⁾	SCL/CLK Input High Voltage		V_CC x 0.7	5.5	V
V_IH⁽³⁾	RST Input High Voltage		V_CC x 0.7	5.5	V
I_IL	SDA/IO Input Low Current	0 < V_IL < V_CC x 0.15		15	μA
I_IL	SCL/CLK Input Low Current	0 < V_IL < V_CC x 0.15		15	μA
I_IL	RST Input Low Current	0 < V_IL < V_CC x 0.15		50	μA
I_IH	SDA/IO Input High Current	V_CC x 0.7 < V_IH < V_CC		20	μA
I_IH	SCL/CLK Input High Current	V_CC x 0.7 < V_IH < V_CC		100	μA
I_IH	RST Input High Voltage	V_CC x 0.7 < V_IH < V_CC		150	μA
V_OH	SDA/IO Output High Voltage	20K Ω external pull-up	V_CC x 0.7	V_CC	V
V_OL	SDA/IO Output Low Voltage	I_OL = 1 mA	0	V_CC x 0.15	V
I_OH	SDA/IO Output High Current	V_OH		20	μA
I_OL	SDA/IO Output High Current	V_OL		10	μA

Note:

Applicable over the recommended operating voltage range from V_CC = 2.7V to 3.6V.
T_AC = -40°C to +85°C (unless otherwise noted).
To prevent latch-up conditions from occurring during power-up of the AT88SCXXXXCA, V_CC must be turned on before applying V_IH. For powering down, V_IH must be removed before turning V_CC off.

Table 12-2. AC Characteristics
Symbol	Parameter	Min.	Max.	Units
f_CLK	Async Clock Frequency	1	4	MHz
f_CLK	Synch Clock Frequency	0	1	MHz
	Clock Duty cycle	40	60	%
t_R	Rise Time: SDA/IO, RST		1	μs
t_F	Fall Time: SDA/IO, RST		1	μs
t_R	Rise Time: SCL/CLK		9% x period	μs
t_F	Fall Time: SCL/CLK		9% x period	μs
t_AA	Clock Low to Data Out Valid		250	ns
t_HD.STA	Start Hold Time	200		ns
t_SU.STA	Start Setup Time	200		ns
t_HD.DAT	Data In Hold Time	10		ns
t_SU.DAT	Data In Setup Time	100		ns
t_SU.STO	Stop Setup Time	200		ns
t_DH	Data Out Hold Time	20		ns
t_WR	Write Cycle Time		5	ms

Note: