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ISL21400
Serial Interface Specification for SCL, SDA, A0, A1, A2 Unless Otherwise Noted.
TYP
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
(Note 2)
MAX
UNITS
I LI
V IL
V IH
Hysteresis
Input Leakage
Input LOW Voltage
Input HIGH Voltage
SDA and SCL Input Buffer
Hysteresis
V IN = GND to V CC
-0.3
0.7 x V CC
0.05 x V CC
1
0.3 x V CC
V CC + 0.3
V
V
V
V
V OL
C pin
f SCL
t sp
SDA Output Buffer LOW Voltage
Pin Capacitance
SCL Frequency
Pulse Width Suppression Time at
SDA and SCL Inputs
I OL = 3mA
(Note 7)
(Note 7)
Any pulse narrower than the
max spec is suppressed
0
10
0.4
400
50
V
pF
kHz
ns
(Note 7)
t AA
t BUF
SCL Falling Edge to SDA Output
Data Valid
Time the Bus Must be Free Before
the Start of a New Transmission
SCL falling edge crossing
30% of V CC , until SDA exits
the 30% to 70% of V CC
window (Note 7)
SDA crossing 70% of V CC
during a STOP condition, to
1300
900
ns
ns
SDA crossing 70% of V CC
during the following START
condition (Note 7)
t LOW
t HIGH
t SU:STA
Clock LOW Time
Clock HIGH Time
START Condition Set-up Time
Measured at the 30% of V CC
crossing (Note 7)
Measured at the 70% of V CC
crossing (Note 7)
SCL rising edge to SDA
falling edge; both crossing
1300
600
600
ns
ns
ns
70% of V CC (Note 7)
t HD:STA
START Condition Hold Time
From SDA falling edge
crossing 30% of V CC to SCL
falling edge crossing 70% of
600
ns
V CC (Note 7)
t SU:DAT
Input Data Set-up Time
From SDA exiting the 30% to
70% of V CC window, to SCL
rising edge crossing 30% of
100
ns
V CC (Note 7)
t HD:DAT
Input Data Hold Time
From SCL rising edge
crossing 70% of V CC to SDA
entering the 30% to 70% of
0
ns
V CC window (Note 7)
t SU:STO
STOP Condition Set-up Time
From SCL rising edge
crossing 70% of V CC , to
SDA rising edge crossing
600
ns
30% of V CC (Note 7)
t HD:STO
STOP Condition Hold Time for
Read, or Volatile Only Write
From SDA rising edge to
SCL falling edge; both
1300
ns
crossing 70% of V CC
(Note 7)
t DH
Output Data Hold Time
From SCL falling edge
crossing 30% of V CC , until
SDA enters the 30% to 70%
0
ns
of V CC window (Note 7)
t R
SDA and SCL Rise Time
From 30% to 70% of V CC
(Note 7)
20 + 0.1 x Cb
250
ns
5
FN8091.3
March 31, 2011
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