C-compatible serial interface, Electrical characteristics (continued) – Rainbow Electronics MAX6635 User Manual
Page 3
MAX6633/MAX6634/MAX6635
12-Bit Plus Sign Temperature Sensors with
SMBus/I
2
C-Compatible Serial Interface
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(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.)
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.
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