4
FN6314.2
July 15, 2010
I2C Interface Specifications Test Conditions: VDD = +2.7 to +5.5V, Temperature = -40°C to +85°C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP (Note 4)
MAX
UNITS NOTES
VIL
SDA and SCL Input Buffer LOW
Voltage
-0.3
0.3 x VDD
V
VIH
SDA and SCL Input Buffer HIGH
Voltage
0.7 x VDD
VDD + 0.3
V
Hysteresis SDA and SCL Input Buffer Hysteresis
0.05 x VDD
V
VOL
SDA Output Buffer LOW Voltage,
Sinking 3mA
VDD = 5V, IOL = 3mA
0.4
V
Cpin
SDA and SCL Pin Capacitance
TA = +25°C, f = 1MHz,
VDD =5V, VIN =0V, VOUT =0V
10
pF
fSCL
SCL Frequency
400
kHz
tIN
Pulse Width Suppression Time at
SDA and SCL Inputs
Any pulse narrower than the
max spec is suppressed.
50
ns
tAA
SCL Falling Edge to SDA Output Data
Valid
SCL falling edge crossing 30%
of VDD, until SDA exits the 30%
to 70% of VDD window.
900
ns
tBUF
Time the Bus Must be Free before the
Start of a New Transmission
SDA crossing 70% of VDD
during a STOP condition, to
SDA crossing 70% of VDD
during the following START
condition.
1300
ns
tLOW
Clock LOW Time
Measured at the 30% of VDD
crossing.
1300
ns
tHIGH
Clock HIGH Time
Measured at the 70% of VDD
crossing.
600
ns
tSU:STA
START Condition Setup Time
SCL rising edge to SDA falling
edge. Both crossing 70% of VDD.
600
ns
tHD:STA
START Condition Hold Time
From SDA falling edge crossing
30% of VDD to SCL falling edge
crossing 70% of VDD.
600
ns
tSU:DAT
Input Data Setup Time
From SDA exiting the 30% to
70% of VDD window, to SCL
rising edge crossing 30% of VDD.
100
ns
tHD:DAT
Input Data Hold Time
From SCL falling edge crossing
30% of VDD to SDA entering the
30% to 70% of VDD window.
0
900
ns
tSU:STO
STOP Condition Setup Time
From SCL rising edge crossing
70% of VDD, to SDA rising edge
crossing 30% of VDD.
600
ns
tHD:STO
STOP Condition Hold Time
From SDA rising edge to SCL
falling edge. Both crossing 70%
of VDD.
600
ns
tDH
Output Data Hold Time
From SCL falling edge crossing
30% of VDD, until SDA enters
the 30% to 70% of VDD window.
0ns
tR
SDA and SCL Rise Time
From 30% to 70% of VDD.
20 + 0.1 x Cb
300
ns
tF
SDA and SCL Fall Time
From 70% to 30% of VDD.
20 +
0.1 x Cb
300
ns
Cb
Capacitive Loading of SDA or SCL
Total on-chip and off-chip
10
400
pF
ISL1219