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Temperature Sensor and
System Monitor in a 10-Pin μMAX
ELECTRICAL CHARACTERISTICS (continued)
(T A = -40°C to +125°C, unless otherwise noted. Typical values are at V CC = +3.3V, T A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING (Figures 3 and 4)
Serial Clock Frequency
Bus Free Time Between Stop
and Start
Start Condition Hold Time
Stop Condition Hold Time
Clock Low Time
Clock High Time
Data Setup Time
f SCL
T BUF
t HD : STA
t SU : STO
T LOW
T HIGH
t SU : DAT
0
1.3
0.6
0.6
1.3
0.6
100
400
kHz
μs
μs
μs
μs
μs
ns
Data Hold Time
Receive SCL/SDA Minimum
Rise Time
Receive SCL/SDA Maximum
Rise Time
Receive SCL/SDA Minimum Fall
Time
Receive SCL/SDA Maximum Fall
Time
Transmit SDA Fall Time
Pulse Width of Spike
Suppressed
t HD : DAT
t R
t R
t F
t F
t F
t SP
(Note 2)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
C b = 400pF, I SINK = 3mA
(Note 4)
0
20 +
0.1C b
20 +
0.1C b
300
20 +
0.1C b
300
50
0.9
300
μs
ns
ns
ns
ns
ns
ns
Note 1: Total monitoring time includes temperature conversion and four analog input voltage conversions.
Note 2: A master device must provide at least a 300ns hold time for the SDA signal, referred to V IL of the SCL signal, to bridge the
undefined region of SCL’s falling edge.
Note 3: C b = total capacitance of one bus line in pF. Rise and fall times are measured between 0.3 ? V CC to 0.7 ? V CC .
Note 4: Input filters on SDA, SCL, and ADD suppress noise spikes <50ns.
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3
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