I2c/smbus interface electrical specifications, I2c/smbus timing, C/smbus interface electrical specifications – Rainbow Electronics MAX34440 User Manual
Page 8: C/smbus timing
PMBus 6-Channel Power-Supply Manager
MAX34440
8
I
2
C/SMBus INTERFACE ELECTRICAL SPECIFICATIONS
(V
DD
= 2.7V to 5.5V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25NC, unless otherwise noted.)
Note 1: All voltages are referenced to ground (V
SS
). Currents entering the IC are specified as positive, and currents exiting the IC
are negative.
Note 2: This does not include pin input/output currents.
Note 3: Guaranteed by design.
I
2
C/SMBus Timing
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SCL Clock Frequency
f
SCL
10
100
kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
4.7
F
s
Hold Time (Repeated) START
Condition
t
HD:STA
4.0
F
s
Low Period of SCL
t
LOW
4.7
F
s
High Period of SCL
t
HIGH
4.0
F
s
Data Hold Time
t
HD:DAT
Receive
0
ns
Transmit
300
Data Setup Time
t
SU:DAT
100
ns
START Setup Time
t
SU:STA
4.7
F
s
SDA and SCL Rise Time
t
R
300
ns
SDA and SCL Fall Time
t
F
300
ns
STOP Setup Time
t
SU:STO
4.0
F
s
Clock Low Timeout
t
TO
25
35
ms
SCL
NOTE: TIMING IS REFERENCED TO V
IL(MAX)
AND V
IH(MIN)
.
SDA
STOP
START
REPEATED
START
t
BUF
t
HD:STA
t
HD:DAT
t
SU:DAT
t
SU:STO
t
HD:STA
t
SP
t
SU:STA
t
HIGH
t
R
t
F
t
LOW