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M
Remote Temperature Switches with Integrated
Fan Controller/Driver
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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
..............................................................±20mA
Current into
FANOUT
, PGND ........................................ ±300mA
ELECTRICAL CHARACTERISTICS
(V
DD
= +3V to +3.6V, T
A
= -40
°
C to +125
°
C, unless otherwise noted. Typical values are at V
DD
= +3.3V and T
A
= +25
°
C.)
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.
Continuous Power Dissipation (T
A
= +70
°
C)
8-Pin μMAX (derate 4.1mW/
°
C above +70
°
C).............333mW
10-Pin μMAX (derate 5.6mW/
°
C above +70
°
C)...........444mW
Operating Temperature Range .........................-40
°
C to +125
°
C
Storage Temperature Range.............................-60
°
C to +150
°
C
Junction Temperature......................................................+150
°
C
Lead Temperature (soldering, 10s).................................+300
°
C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
Power-Supply Range
Average Supply Current
Operating Current
Power-On Reset (POR) Threshold
POR Threshold Hysteresis
TEMPERATURE SENSOR
V
DD
I
DD
3
3.6
200
650
2.0
V
μA
μA
V
mV
110
400
1.5
50
During sampling
V
DD
falling edge
POR
1
T
RJ
= +40
°
C to +75
°
C (Note 1),
T
A
= 0
°
C to +85
°
C, V
DD
= +3.3V
±
1
±
2.2
FANOUT
Temperature
Threshold Accuracy
T
TH
T
RJ
= +40
°
C to +75
°
C (Note 1),
T
A
= -40
°
C to +125
°
C, V
DD
= +3.3V
±1
±
4
°
C
HYST = GND
HYST = float
HYST = V
DD
4
8
12
8
MAX6670
FANOUT
Temperature
Threshold Hysteresis
T
HYST
MAX6668
°
C
WARN
Temperature Threshold
(MAX6670 Only)
Relative to
FANOUT
temperature threshold
+15
°
C
OT
Temperature Threshold
(MAX6670 Only)
Relative to
FANOUT
temperature threshold
+30
°
C
Supply Sensitivity of Temperature
Threshold
1
1.6
°
C/V
Temperature Sample Frequency
FAN DRIVE OUTPUT
FANOUT
Output Voltage Low
Thermal Shutdown
Thermal Shutdown Hysteresis
LOGIC INPUT/OUTPUT
3.3
4
Hz
V
OL
I
SINK
= 250mA
0.5
170
20
1
V
°
C
°
C
FORCEON
Input High Voltage
V
IH
0.8 x
V
DD
V