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ADM1023
Table 4. ELECTRICAL CHARACTERISTICS (T A = T MIN to T MAX , V DD = 3.0 V to 3.6 V, unless otherwise noted. (Note 1)
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
SMBus Interface (See Figure 2)
Logic Input High Voltage, V IH
STBY, SCLK, SDATA
Logic Input Low Voltage, V IL
STBY, SCLK, SDATA
SMBus Output Low Sink Current
ALERT Output Low Sink Current
Logic Input Current, I IH , I IL
SMBus Input Capacitance, SCLK, SDATA
SMBus Clock Frequency
SMBus Clock Low Time, t LOW
SMBus Clock High Time, t HIGH
SMBus Start Condition Setup Time,
t SU:STA
SMBus Start Condition Hold Time, t HD:STA
SMBus Stop Condition Setup Time, t SU:STO
SMBus Data Valid to SCLK Rising Edge
Time, t SU:DAT
SMBus Bus Free Time, t BUF
SCLK SDATA Rise Time, t R MAX
SCLK SDATA Fall Time, t F MAX
V DD = 3.0 V to 5.5 V
V DD = 3.0 V to 5.5 V
SDATA Forced to 0.6 V
ALERT Forced to 0.4 V
t LOW between 10% Points
t HIGH between 90% Points
Time from 10% of SDATA to 90% of SCLK
Time from 90% of SCLK to 10% of SDATA
Time for 10% or 90% of SDATA to 10% of SCLK
Between Start/Stop Condition
Master Clocking in Data
V DD = 0 V
2.2
?
6.0
1.0
? 1.0
?
?
1.3
0.6
0.6
0.6
0.6
100
1.3
?
?
?
?
?
?
?
5.0
?
?
?
?
?
?
?
?
?
?
?
0.8
?
?
+1.0
?
400
?
?
?
?
?
?
?
300
300
V
V
mA
mA
m A
pF
kHz
m s
m s
m s
m s
m s
ns
m s
ns
ns
1.
2.
3.
4.
T MAX = 120 ? C, T MIN = 0 ? C
T D is the temperature of the remote thermal diode; T A , T D = 60 ? C to 100 ? C
Operation at V DD = 5.0 V guaranteed by design; not production tested
Guranteed by design; not production tested
t LOW
t R
t F
t HD;STA
SCL
t HD;STA
t HD;DAT
t HIGH
t SU;DAT
t SU;STA
t SU;STO
SDA
P
t BUF
S
S
P
Figure 2. Diagram for Serial Bus Timing
http://onsemi.com
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