ISL23318
7
FN7887.0
July 26, 2011
Serial Interface Specification For SCL, SDA, A0, A1 unless otherwise noted.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VIL
Input LOW Voltage
-0.3
0.3 x VLOGIC
V
VIH
Input HIGH Voltage
0.7 x VLOGIC
VLOGIC + 0.3
V
Hysteresis
SDA and SCL Input Buffer
Hysteresis
VLOGIC > 2V
0.05 x VLOGIC
V
VLOGIC < 2V
0.1 x VLOGIC
VOL
SDA Output Buffer LOW Voltage
IOL = 3mA, VLOGIC > 2V
0
0.4
V
IOL = 1.5mA, VLOGIC < 2V
0.2 x VLOGIC
V
Cpin
SDA, SCL Pin Capacitance
10
pF
fSCL
SCL Frequency
400
kHz
tsp
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 VLOGIC, until SDA exits the
30% to 70% of VLOGIC window
900
ns
tBUF
Time the Bus Must be Free Before
the Start of a New Transmission
SDA crossing 70% of VLOGIC
during a STOP condition, to
SDA crossing 70% of VLOGIC
during the following START
condition
1300
ns
tLOW
Clock LOW Time
Measured at the 30% of
VLOGIC crossing
1300
ns
tHIGH
Clock HIGH Time
Measured at the 70% of
VLOGIC crossing
600
ns
tSU:STA
START Condition Set-up Time
SCL rising edge to SDA falling
edge; both crossing 70% of
VLOGIC
600
ns
tHD:STA
START Condition Hold Time
From SDA falling edge
crossing 30% of VLOGIC to SCL
falling edge crossing 70% of
VLOGIC
600
ns
tSU:DAT
Input Data Set-up Time
From SDA exiting the 30% to
70% of VLOGIC window, to SCL
rising edge crossing 30% of
VLOGIC
100
ns
tHD:DAT
Input Data Hold Time
From SCL falling edge crossing
70% of VCC to SDA entering
the 30% to 70% of VLOGIC
window
0ns
tSU:STO
STOP Condition Set-up Time
From SCL rising edge crossing
70% of VLOGIC, to SDA rising
edge crossing 30% of VLOGIC
600
ns
tHD:STO
STOP Condition Hold Time for Read
or Write
From SDA rising edge to SCL
falling edge; both crossing
70% of VLOGIC
1300
ns
tDH
Output Data Hold Time
From SCL falling edge crossing
30% of VLOGIC, until SDA
enters the 30% to 70% of
VLOGIC window.
IOL =3mA, VLOGIC > 2V.
IOL = 0.5mA, VLOGIC < 2V
0ns
tR
SDA and SCL Rise Time
From 30% to 70% of VLOGIC
20 + 0.1 x Cb
250
ns