Datasheet

Note 1: Guaranteed by design and characterization.
Note 2: Peak operating current measured during conversion. See Figure 4.
Note 3: Guaranteed by design, not production tested.
Note 4: A master device must provide a hold time of at least 300ns for the SDA signal in order to bridge the undefined region of
SCL’s falling edge.
(V
CC
= +3.0V to +5.5V, T
A
= -55°C to +125°C, unless otherwise noted. Typical values are V
CC
= +3.3V, T
A
= +25°C, unless other-
wise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SMBus TIMING (Note 3) (Figures 1, 2, and 3)
Serial Clock Frequency f
SCL
10 100 kHz
Bus Free Time Between STOP
and START Condition
t
BUF
4.7 µs
START Condition Setup Time 4.7 µs
Repeat START Condition Setup
Time
t
SU:STA
90% to 90% 4.7 µs
START Condition Hold Time t
HD:STA
10% of SMBDATA to 90% of SMBCLK 4 µs
STOP Condition Setup Time t
SU:STO
90% of SMBCLK to 10% of SMBDATA 4 µs
Data Setup Time t
SU:DAT
90% of SMBDATA to 10% of SMBCLK 250 ns
Data Hold Time (Note 4) t
HD:DAT
300 ns
Receive SCL/SDA Rise Time t
R
1 µs
SCL/SDA Fall Time (Note 4) t
F
300 ns
Clock Low Period t
LOW
10% to 10% 4.7 µs
Clock High Period t
HIGH
90% to 90% 4 µs
SMBus Timeout 25 48 ms
MAX6633/MAX6634/
MAX6635
12-Bit Plus Sign Temperature Sensors
with SMBus/I
2
C-Compatible Serial Interface
www.maximintegrated.com
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Electrical Characteristics (continued)