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MAX6639AEE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
General Description
The MAX6639 monitors its own temperature and one
external diode-connected transistor or the temperatures
of two external diode-connected transistors, typically
available in CPUs, FPGAs, or GPUs. The 2-wire serial
interface accepts standard System Management Bus
(SMBus) write byte, read byte, send byte, and receive
byte commands to read the temperature data and pro-
gram the alarm thresholds. Temperature data can be
read at any time over the SMBus, and three program-
mable alarm outputs can be used to generate inter-
rupts, throttle signals, or overtemperature shutdown
signals.
The temperature data is also used by the internal dual-
PWM fan-speed controller to adjust the speed of up to
two cooling fans, thereby minimizing noise when the
system is running cool, but providing maximum cooling
when power dissipation increases. Speed control is
accomplished by tachometer feedback from the fan, so
that the speed of the fan is controlled, not just the PWM
duty cycle. Accuracy of speed measurement is ±4%.
The MAX6639 is available in 16-pin QSOP and 16-pin thin
QFN 5mm x 5mm packages. It operates from 3.0V to 3.6V
and consumes just 500µA of supply current.
Applications
Desktop Computers
Notebook Computers
Projectors
Servers
Networking Equipment
Features
o Two Thermal-Diode Inputs
o Up to 25kHz PWM Output Frequency
o Three Selectable SMBus Addresses
o Local Temperature Sensor
o 1°C Remote Temperature Accuracy
o Two PWM Outputs for Fan Drive (Open Drain; Can
be Pulled Up to +13.5V)
o Programmable Fan-Control Characteristics
o Automatic Fan Spin-Up Ensures Fan Start
o Controlled Rate-of-Change Ensures Unobtrusive
Fan-Speed Adjustments
o ±3% Fan-Speed Measurement Accuracy
o Temperature Monitoring Begins at POR for Fail-
Safe System Protection
o OT and THERM Outputs for Throttling or Shutdown
o Measures Temperatures Up to +150°C
o MAX6639F is Optimized for n = 1.021 for Penryn
Compatibility
2-Channel Temperature Monitor with Dual,
Automatic, PWM Fan-Speed Controller
MAX6639/MAX6639F
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
EVALUATION KIT AVAILABLE
Ordering Information
19-3682; Rev 3; 4/13
PART
O PER A T IN G
RANGE
M EA SU R EM EN T
RANGE
PIN-
PACKAGE
M A X6 6 3 9 A E E +
-40°C to
+125°C
0°C to +150°C 16 QSOP
MAX6639ATE+
-40°C to
+125°C
0°C to +150°C 16 TQFN - E P *
M AX6 639FAEE+
-40°C to
+125°C
0°C to +150°C 16 QSOP
MAX6639FATE +
-40°C to
+125°C
0°C to +150°C 16 TQFN- E P *
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
PWM1
SCL
SDA
ADD
DXP2
DXN
GND
DXP1
TOP VIEW
MAX6639
QSOP
TACH1
PWM2
TACH2
V
CC
FANFAIL
THERM
OT
ALERT
MAX6639
*CONNECT EXPOSED
PAD TO GND.
V
CC
GND
DXP1
OT
PWM1
SDA
SCL
TACH1
PWM2
TACH2
FANFAIL
THERM
ADD
DXP2
DXN
ALERT
15
16
14
13
6
5
7
8
12 4
12 11 9
3
10
Pin Configurations
Typical Application Circuit appears at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
2-Channel Temperature Monitor with Dual,
Automatic, PWM Fan-Speed Controller
2 Maxim Integrated
MAX6639/MAX6639F
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +85°C.) (Note 1)
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
CC
to GND..............................................................-0.3V to +4V
PWM1, PWM2, TACH1, and TACH2 to GND ......-0.3V to +13.5V
DXP1 and DXP2 to GND ..........................-0.3V to +(V
CC
+ 0.3V)
DXN to GND ..........................................................-0.3V to +0.8V
SCL, SDA, THERM, OT, FANFAIL, ADD,
and ALERT to GND ..............................................-0.3V to +6V
SDA, OT, THERM, ALERT, FANFAIL,
PWM1, and PWM2 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 (derated 8.3mW/°C above +70°C) ....... 667mW
16-Pin TQFN 5mm x 5mm
(derated at 33.3mW/°C above +70°C)................2666.7mW
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
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage Range V
CC
+3.0 +3.6 V
Standby Current SMB static, sleep mode 3 10 µA
Operating Current Interface inactive, ADC active 0.5 1 mA
V
CC
= +3.3V, +60°C ≤ T
A
≤ +100°C and
+60°C ≤ T
R
≤ +100°C
-1.0 +1.0
V
CC
= +3.3V, +40°C ≤ T
A
≤ +100°C and
0°C ≤ T
R
≤ +145°C
-2.5 +2.5
External Temperature Error
MAX6639AEE, MAX6639ATE:
n = 1.008
MAX6639FAEE: n = 1.021
V
CC
= +3.3V, 0°C ≤ T
R
≤ +145°C -3.8 +3.8
°C
V
CC
= +3.3V, +25°C ≤ T
A
≤ +100°C -2.0 +2.0
Internal Temperature Error
MAX6639AEE, MAX6639ATE
V
CC
= +3.3V, 0°C ≤ T
A
≤ +125°C -4.0 +4.0
°C
V
CC
= +3.3V, +25°C ≤ T
A
≤ +100°C -7.7 -2.5
Internal Temperature Error
MAX6639FAEE
V
CC
= +3.3V, 0°C ≤ T
A
≤ +125°C -10.4 -0.1
°C
Supply Sensitivity of Temperature
Measurement
±0.2 °C/V
+0.125 °C
Temperature Resolution
11 Bits
Conversion Time 125 ms
Conversion-Rate Timing Error -10 +10 %
PWM Frequency Error -10 +10 %
Tachometer Accuracy T
A
= +60°C to +100°C ±3 %
High level 70 100 130
Remote-Diode Sourcing Current
Low level 7.0 10 13.0
µA
DXN Source Voltage 0.7 V
2-Channel Temperature Monitor with Dual,
Automatic, PWM Fan-Speed Controller
Maxim Integrated 3
MAX6639/MAX6639F
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, T
A
= 0°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS AND OUTPUTS
ALERT, FANFAIL, THERM, OT, SDA
I
SINK
= 6mA
0.4
Output Low Voltage (Sink
Current) (OT, ALERT, FANFAIL,
THERM, SDA, PWM1, and PWM2)
V
OL
PWM1, PWM2, I
SINK
= 4mA 0.4
V
Output High Leakage Current
(OT, ALERT, FANFAIL, THERM,
SDA, PWM1, and PWM2)
I
OH
1µA
Logic-Low Input Voltage (SDA,
SCL, THERM, TACH1, TACH2)
V
IL
0.8 V
Logic-High Input Voltage (SDA,
SCL, THERM, TACH1, TACH2)
V
IH
V
CC
= 3.3V 2.1 V
Input Leakage Current (SDA,
SCL, THERM, TACH1, TACH2)
V
IN
= V
CC
or GND 1 µA
Input Capacitance C
IN
5pF
SMBus TIMING (Note 2)
Serial Clock Frequency f
SCL
(Note 3) 10 100 kHz
Clock Low Period t
LOW
10% to 10% 4 µs
Clock High Period t
HIGH
90% to 90% 4.7 µs
Bus Free Time Between STOP
and START Conditions
t
BUF
4.7 µs
SMBus START Condition Setup
Time
t
SU:STA
90% of SMBCLK to 90% of SMBDATA 4.7 µs
START Condition Hold Time t
HD:STO
10% of SDA to 10% of SCL 4 µs
STOP Condition Setup Time t
SU:STO
90% of SCL to 10% of SDA 4 µs
Data Setup Time t
SU:DAT
10% of SDA to 10% of SCL 250 ns
Data Hold Time t
HD:DAT
10% of SCL to 10% of SDA (Note 4) 300 ns
SMBus Fall Time t
F
300 ns
SMBus Rise Time t
R
1000 ns
SMBus Timeout t
TIMEOUT
58 74 90 ms
Note 1: All parameters tested at a single temperature. Specifications are guaranteed by design.
Note 2: Timing specifications guaranteed by design.
Note 3: The serial interface resets when SCL is low for more than t
TIMEOUT
.
Note 4: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SCL's falling edge.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

MAX6639AEE+

Mfr. #:
Buy MAX6639AEE+
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors 2Ch Temperature Monito
Lifecycle:
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