MAX6657/MAX6658/MAX6659
_______________________________________________________________________________________ 3
Note 1: T
A
= +25°C to +85°C.
Note 2: If both the local and the remote junction are below T
A
= -20°C, then V
CC
> 3.15V.
Note 3: For conversion rates of 4Hz or slower, the conversion time doubles.
Note 4: Timing specifications guaranteed by design.
Note 5: The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
Note 6: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK's falling edge.
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Typical Operating Circuit, V
CC
= +3.0V to +5.5V, T
A
= 0°C to +125°C, unless otherwise specified. Typical values are at
V
CC
= +3.3V and T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Conversion Time t
CONV
From stop bit to conversion completed
(Note 4)
95 125 156 ms
Conversion Timing Error ±25 %
DXP and DXN Leakage Current In standby mode 100 nA
High level 80 100 120
Remote-Diode Source Current I
RJ
Low level 8 10 12
µA
(ALERT, OVERT)
V
OL
= 0.4V 1
Output Low Sink Current
V
OL
= 0.6V 6
mA
Output High Leakage Current V
OH
= 5.5V 1 µA
SMBus-COMPATIBLE INTERFACE (SMBCLK, SMBDATA, STBY)
Logic Input Low Voltage V
IL
0.8 V
V
CC
= +3.0V 2.2
Logic Input High Voltage V
IH
V
CC
= +5.5V 2.4
V
Input Leakage Current I
LEAK
V
IN
= GND or V
CC
±1 µA
Output Low Sink Current I
OL
V
OL
= 0.6V 6 mA
Input Capacitance C
IN
5pF
SMBus-COMPATIBLE TIMING (Note 4)
Serial Clock Frequency f
SCL
(Note 5) 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% 50 ns
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 90% of SMBDATA 4 µs
Clock Low Period t
LOW
10% to 10% 4.7 µs
Clock High Period t
HIGH
90% to 90% 4 µs
Data Setup Time t
HD:DAT
(Note 6) 0 µs
Receive SCL/SDA Rise Time t
R
1µs
Receive SCL/SDA Fall Time t
F
300 ns
Pulse Width of Spike Suppressed t
SP
050ns
SMBus Timeout SMBDATA low period for interface reset 25 37 45 ms
±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
(19 Seiten)
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