Datasheet

MAX6653/MAX6663/MAX6664
Temperature Monitors and
PWM Fan Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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 Are Referenced to GND
TACH/AIN ..............................................................-0.3V to +5.5V
V
CC
...........................................................................-0.3V to +6V
DXP, ADD, CRIT0, CRIT1........................-0.3V to + (V
CC
+ 0.3V)
DXN .......................................................................-0.3V to +0.8V
SMBDATA, SMBCLK, INT, THERM,
FAN_FAULT, SDL, SDR............................................-0.3V to +6V
SMBDATA, INT, THERM, FAN_FAULT,
PWM_OUT Current..............................................-1mA to +50mA
DXN Current .......................................................................±1mA
ESD Protection (all pins, Human Body Model) ..................2000V
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3 mW/°C above +70°C)..........667mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
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.) (Note1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage Range V
CC
3.0 5.5 V
Standby Current SMBDAT = SMBCLK = 1, register 00h = 00h 10 µA
Operating Current I
S
SMBDAT = SMBCLK = 1 0.5 1 mA
Average Operating Current Conversion rate = 4Hz (default) 150 300 µA
V
C C
= + 3.3V , T
A
= 0° C to + 100° C ,
+ 60°C ≤ T
R
≤ + 100° C
±1
V
CC
= +3.3V, 0° C ≤ T
R
≤ +100° C±3
External Temperature Error
V
CC
= +3.3V, -25° C ≤ T
R
≤ +125° C±4
° C
V
CC
= +3.3V, 0° C ≤ T
A
≤ +100° C±2
Internal Temperature Error
V
CC
= +3.3V, -40° C ≤ T
A
≤ +125° C±4
° C
0.125 ° C
Temperature Resolution
(Internal and External)
11 Bits
Fan TACHOMETER Accuracy (Note 2) 6 %
Fan TACHOMETER Full-Scale
Count
255
Divisor = 1, fan count = 153 4400
Divisor = 2, fan count = 153 2200
Divisor = 4, fan count = 153 1100
TACHOMETER Nominal Input
RPM
Divisor = 8, fan count = 153 550
RPM
Internal Clock Frequency 254 270 286 kHz
TACHOMETER Conversion Cycle
Time
637 ms