1°C Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, T
A
= -55°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25°C.)
PARAMETER
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
Output Low Sink Current
Input Capacitance
Output High Leakage Current
Serial Clock Frequency
Bus Free Time Between STOP
and START Conditions
START Condition Setup Time
Repeat START Condition Setup
Time
START Condition Hold Time
STOP Condition Setup Time
Clock Low Period
Clock High Period
Data Setup Time
Data Hold Time
Receive SCL/SDA Rise Time
Receive SCL/SDA Fall Time
SMBus Timeout
t
SU:STA
t
HD:STA
t
SU:STO
t
LOW
t
HIGH
t
SU: DAT
t
HD: DAT
t
R
t
F
t
TIMEOUT
SMBDATA and SMBCLK time low for reset
of serial interface
+25
90% to 90%
10% of SMBDATA to 90% of SMBCLK
90% of SMBCLK to 10% of SMBDATA662
10% to 10%
90% to 90%
90% of SMBDATA to 10% of SMBCLK
(Note 5)
f
SCL
t
BUF
SYMBOL
V
IL
V
IH
I
LEAK
I
OL
C
in
V
OH
= +5.5V
(Note 4)
0
+4.7
+4.7
+50
+4
+4
+4.7
+4
+250
0
+1
+300
+40
V
CC
= +3.0V
V
CC
= +5.5V
V
IN
= GND or V
CC
V
OL
= +0.6V
V
OL
= +0.4V
+6
+1
+5
+1
+100
CONDITIONS
V
CC
= +3.0V to +5.5V
+2.2
+2.6
±2
MIN
TYP
MAX
+0.8
UNITS
V
V
µA
mA
pF
µA
kHz
µs
µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
ms
MAX6654
Note 1:
+25°C
≤
T
A
≤
+85°C.
Note 2:
If both the MAX6654 and the remote junction are below T
A
= -20°C, then V
CC
> 3.15V.
Note 3:
The conversion time doubles for the extended resolution mode. This causes the average operating current to approximately
double.
Note 4:
The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
Note 5:
Note that a transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s
falling edge.
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
