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Remote Temperature Switches with Integrated
Fan Controller/Driver
2  _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +3V to +3.6V, T
A
= -40癈 to +125癈, unless otherwise noted. Typical values are at V
DD
= +3.3V and T
A
= +25癈.)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND..............................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
FANOUT to GND ....................................................-0.3V to +15V
DXN to GND ..........................................................-0.3V to +0.8V
DXP, WARN, HYST, FORCEON, OT...........-0.3V to (V
DD
+ 0.3V)
Current into V
DD
, GND, DXP, DXN, WARN, HYST,
FORCEON, OT..............................................................?0mA
Current into FANOUT, PGND ........................................ ?00mA
Continuous Power Dissipation (T
A
= +70癈)
8-Pin 礛AX (derate 4.1mW/癈 above +70癈).............333mW
10-Pin 礛AX (derate 5.6mW/癈 above +70癈)...........444mW
Operating Temperature Range .........................-40癈 to +125癈
Storage Temperature Range.............................-60癈 to +150癈
Junction Temperature......................................................+150癈
Lead Temperature (soldering, 10s).................................+300癈
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
Power-Supply Range
V
DD
3
3.6
V
Average Supply Current
I
DD
110
200
礎
Operating Current
During sampling
400
650
礎
Power-On Reset (POR) Threshold
POR
V
DD
 falling edge
1
1.5
2.0
V
POR Threshold Hysteresis
50
mV
TEMPERATURE SENSOR
T
RJ
 = +40癈 to +75癈 (Note 1),
T
A
 = 0癈 to +85癈, V
DD
 = +3.3V
?
?.2
FANOUT Temperature
Threshold Accuracy
T
TH
T
RJ
 = +40癈 to +75癈 (Note 1),
T
A
 = -40癈 to +125癈, V
DD
 = +3.3V
?
?
癈
HYST = GND
4
HYST = float
8
MAX6670
HYST = V
DD
12
FANOUT Temperature
Threshold Hysteresis
T
HYST
MAX6668
8
癈
WARN Temperature Threshold
(MAX6670 Only)
Relative to FANOUT temperature threshold
+15
癈
OT Temperature Threshold
(MAX6670 Only)
Relative to FANOUT temperature threshold
+30
癈
Supply Sensitivity of Temperature
Threshold
1
1.6
癈/V
Temperature Sample Frequency
3.3
4
Hz
FAN DRIVE OUTPUT
FANOUT Output Voltage Low
V
OL
I
SINK
 = 250mA
0.5
1
V
Thermal Shutdown
170
癈
Thermal Shutdown Hysteresis
20
癈
LOGIC INPUT/OUTPUT
FORCEON Input High Voltage
V
IH
0.8 x
V
DD
V
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