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MAX34446
PMBus Power-Supply Data Logger
I 2 C/SMBus INTERFACE ELECTRICAL CHARACTERISTICS
(V DD = 2.7V to 5.5V, T A = -40 N C to +105 N C, unless otherwise noted. Typical values are at V DD = 3.3V, T A = +25 N C.)
PARAMETER
SCL Clock Frequency
SYMBOL
f SCL
CONDITIONS
MIN
10
TYP
MAX
100
UNITS
kHz
Bus Free Time Between STOP
and START Conditions
t BUF
4.7
F s
Hold Time (Repeated) START
Condition
Low Period of SCL
High Period of SCL
Data Hold Time
Data Setup Time
START Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
STOP Setup Time
t HD:STA
t LOW
t HIGH
t HD:DAT
t SU:DAT
t SU:STA
t R
t F
t SU:STO
(Note 5)
Receive
Transmit
4.0
4.7
4.0
0
300
100
4.7
4.0
300
300
F s
F s
F s
ns
ns
F s
ns
ns
F s
Clock Low Timeout
t TO
25
35
ms
Note 1: All voltages are referenced to ground (V SS ). Currents entering the device are specified as positive, and currents exiting
the device are specified as negative.
Note 2: This does not include pin input/output currents.
Note 3: Guaranteed by design; not production tested.
Note 4: ADC has no missing codes.
Note 5: Commands MFR_MODE, STORE_DEFAULT_ALL, and RESTORE_DEFAULT_ALL require a bus free time of 250ms.
I 2 C/SMBus Timing
SDA
t BUF
t LOW
t F
t HD:STA
t SP
SCL
t HD:STA
t R
t HIGH
t SU:STA
t SU:STO
t HD:DAT
t SU:DAT
STOP
START
REPEATED
START
NOTE: TIMING IS REFERENCED TO V IL(MAX) AND V IH(MIN) .
Maxim Integrated
4
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