±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
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
Conversion Time
Conversion Timing Error
DXP and DXN Leakage Current
Remote-Diode Source Current
(ALERT,
OVERT)
Output Low Sink Current
Output High Leakage Current
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
Output Low Sink Current
Input Capacitance
Serial Clock Frequency
Bus Free Time Between STOP
and START Condition
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
Receive SCL/SDA Rise Time
Receive SCL/SDA Fall Time
Pulse Width of Spike Suppressed
SMBus Timeout
t
SU:STA
t
HD:STA
t
SU:STO
t
LOW
t
HIGH
t
HD:DAT
t
R
t
F
t
SP
SMBDATA low period for interface reset
0
25
37
90% to 90%
10% of SMBDATA to 90% of SMBCLK
90% of SMBCLK to 90% of SMBDATA
10% to 10%
90% to 90%
(Note 6)
V
IL
V
IH
I
LEAK
I
OL
C
IN
f
SCL
t
BUF
(Note 5)
4.7
4.7
50
4
4
4.7
4
0
1
300
50
45
V
CC
= +3.0V
V
CC
= +5.5V
V
IN
= GND or V
CC
V
OL
= 0.6V
6
5
100
2.2
2.4
±1
V
OL
= 0.4V
V
OL
= 0.6V
V
OH
= 5.5V
1
6
1
0.8
mA
µA
V
V
µA
mA
pF
kHz
µs
µs
ns
µs
µs
µs
µs
µs
µs
ns
ns
ms
I
RJ
In standby mode
High level
Low level
80
8
100
10
SYMBOL
t
CONV
CONDITIONS
From stop bit to conversion completed
(Note 4)
MIN
95
TYP
125
MAX
156
±25
100
120
12
UNITS
ms
%
nA
µA
MAX6657/MAX6658/MAX6659
SMBus-COMPATIBLE INTERFACE (SMBCLK, SMBDATA,
STBY)
SMBus-COMPATIBLE TIMING
(Note 4)
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
T
A
= +25°C to +85°C.
If both the local and the remote junction are below T
A
= -20°C, then V
CC
> 3.15V.
For conversion rates of 4Hz or slower, the conversion time doubles.
Timing specifications guaranteed by design.
The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
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 ]
