Rainbow Electronics MAX6641 User Manual
Page 2
MAX6641
SMBus-Compatible Temperature Monitor with
Automatic PWM Fan-Speed Controller
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= 0
°C to +125°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, 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.
All Voltages Referenced to GND
V
CC
,
OT, SMBDATA, SMBCLK, PWMOUT...............-0.3V to +6V
DXP .........................................................…-0.3V to (V
CC
+ 0.3V)
DXN ......................................................................-0.3V to +0.8V
ESD Protection
(all pins, Human Body Model) ......…………………….±2000V
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) .......... 444mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ............................... +300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage Range
V
CC
3.0
5.5
V
Operating Current
SMBDATA, SMBCLK not switching
0.5
1
mA
+25°C
≤ T
R
≤ +125°C,
T
A
= +60°C
±1
0°C
≤ T
R
≤ +145°C,
+25°C
≤ T
A
=
≤ +100°C
±3
External Temperature Error
V
CC
= 3.3V
0°C
≤ T
R
≤ +145°C,
0°C
≤ T
A
≤ +125°C
±4
°C
+25°C
≤ T
A
≤ +100°C
-2.5
+2.5
Internal Temperature Error
V
CC
= 3.3V
0°C
≤ T
A
≤ +125°C
-4
+4
°C
1
°C
Temperature Resolution
8
Bits
Conversion Time
200
250
300
ms
PWM Frequency Tolerance
-20
+20
%
High level
80
100
120
Remote-Diode Sourcing Current
Low level
8
10
12
µA
DXN Source Voltage
0.7
V
I/O
OT, SMBDATA, PWMOUT Output
Low Voltage
V
OL
I
OUT
= 6mA
0.4
V
OT, SMBDATA, PWMOUT
Output-High Leakage Current
I
OH
V
CC
= 5.5V
1
µA
SMBDATA, SMBCLK Logic-Low
Input Voltage
V
IL
V
CC
= 3V to 5.5V
0.8
V
SMBDATA, SMBCLK Logic-High
Input Voltage
V
IH
V
CC
= 3V to 5.5V
2.1
V
SMBDATA, SMBCLK Leakage
Current
1
µA
SMBDATA, SMBCLK Input
Capacitance
C
IN
5
pF