MAX6641AUB96+ Maxim Integrated Products, MAX6641AUB96+ Datasheet

IC TEMP MONITOR SMBUS 10UMAX

MAX6641AUB96+

Manufacturer Part Number
MAX6641AUB96+
Description
IC TEMP MONITOR SMBUS 10UMAX
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6641AUB96.pdf (17 pages)

Specifications of MAX6641AUB96+

Function
Fan Control, Temp Monitor
Topology
ADC, PWM Generator, Tach Counter
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 125°C, External Sensor
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Full Temp Accuracy
+/- 4 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
8 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6641 temperature sensor and fan controller
accurately measures the temperature of its own die and
the temperature of a remote pn junction. The device
reports temperature values in digital form using a 2-wire
serial interface. The remote pn junction is typically the
emitter-base junction of a common-collector pnp on a
CPU, FPGA, or ASIC.
The 2-wire serial interface accepts standard System
Management Bus (SMBus)
send byte, and receive byte commands to read the
temperature data and program the alarm thresholds.
The temperature data controls a PWM output signal to
adjust the speed of a cooling fan, thereby minimizing
noise when the system is running cool, but providing
maximum cooling when power dissipation increases.
The device also features an over-temperature alarm
output to generate interrupts, throttle signals, or shut
down signals. The MAX6641 operates from supply volt-
ages in the 3.0V to 5.5V range and typically consumes
500µA of supply current.
The MAX6641 is available in a slim 10-pin µMAX
age and is available over the -40 C to +125 C automo-
tive temperature range.
19-3304; Rev 1; 4/06
Typical Application Circuit appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SMBus is a trademark of Intel Corp.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Desktop Computers
Notebook Computers
Workstations
Servers
Networking Equipment
Industrial
SMBus-Compatible Temperature Monitor with
________________________________________________________________ Maxim Integrated Products
General Description
Automatic PWM Fan-Speed Controller
TM
write byte, read byte,
Applications
®
pack-
♦ Tiny 3mm x 5mm µMAX Package
♦ Thermal Diode Input
♦ Local Temperature Sensor
♦ Open-Drain PWM Output for Fan Drive
♦ Programmable Fan Control Characteristics
♦ Automatic Fan Spin-Up Ensures Fan Start
♦ ±1°C Remote Temperature Accuracy (+60°C to
♦ Controlled Rate of Change Ensures Unobtrusive
♦ Temperature Monitoring Begins at Power-On for
♦ OT Output for Throttling or Shutdown
Note: All devices are specified over the -40°C to +125°C tem-
perature range.
MAX6641AUB90
MAX6641AUB92
MAX6641AUB94
MAX6641AUB96
+145°C)
Fan-Speed Adjustments
Fail-Safe System Protection
TOP VIEW
PART
GND
DXN
DXP
I.C.
OT
PIN-
PACKAGE
10 µMAX
10 µMAX
10 µMAX
10 µMAX
1
2
3
4
5
Ordering Information
MAX6641
MAX
Pin Configuration
ADDRESS
1001 000x
1001 001x
1001 010x
1001 011x
SMBus
10
9
8
7
6
PWMOUT
V
SMBDATA
SMBCLK
I.C.
CC
Features
CODE
U10-2
U10-2
U10-2
U10-2
PKG
1

Related parts for MAX6641AUB96+

Image
Part Number
Description
Manufacturer
Datasheet
Request R
MAX6641
Part Number:
MAX6641
Description:
SMBus-Compatible Temperature Monitor
Manufacturer:
Maxim Integrated Products
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2831EVKIT+
Part Number:
MAX2831EVKIT+
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products

MAX6641AUB96+ Summary of contents

Page 1

... Servers Networking Equipment Industrial Typical Application Circuit appears at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. SMBus is a trademark of Intel Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...

Page 2

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) OT, SMBDATA, SMBCLK, PWMOUT...............-0. DXP .........................................................…-0. DXN ......................................................................-0.3V to +0.8V ESD Protection (all pins, Human Body Model) ...

Page 3

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V +125 C, unless otherwise noted. Typical values are PARAMETER SYMBOL SMBus-COMPATIBLE TIMING (Note 1) (See ...

Page 4

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller (V = 3.3V +25 C, unless otherwise noted REMOTE TEMPERATURE ERROR vs. POWER-SUPPLY NOISE FREQUENCY +80 C, 250mV SQUARE WAVE APPLIED ...

Page 5

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller PIN NAME 1, 6 I.C. Internally Connected. Must be connected to GND. Combined Remote-Diode Cathode Connection and A/D Negative Input. Connect the cathode of the 2 DXN remote-diode-connected transistor to DXN. Combined ...

Page 6

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Table 1. Register Functions READ/ REGISTER POR FUNCTION/ WRITE ADDRESS STATE NAME Read remote (external) R 00h 0000 0000 temperature Read local R 01h 0000 0000 (internal) temperature Configuration R/W 02h 0000 ...

Page 7

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Table 1. Register Functions (continued) READ/ REGISTER POR FUNCTION/ WRITE ADDRESS STATE NAME Local-diode R/W 0Ch 0000 0000 fan-start temperature R/W 0Dh 0000 xxxx configuration Duty-cycle R/W 0Eh 101x xxxx rate of ...

Page 8

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Write Byte Format S ADDRESS WR 7 bits Slave address: equiva- lent to chip-select line of a 3-wire interface Read Byte Format S ADDRESS WR ACK 7 bits Slave address: equivalent to ...

Page 9

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller LOW HIGH SMBCLK SMBDATA t t HD:STA SU:STA A = START CONDITION B = MSB OF ADDRESS CLOCKED INTO SLAVE C = LSB OF ADDRESS CLOCKED INTO SLAVE ...

Page 10

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Table 2. Configuration Byte Definition (02h) BIT NAME 7 — 6 — 5 TIMEOUT 4 FAN PWM INVERT 3 MIN DUTY CYCLE 2 SPIN-UP DISABLE 1 — 0 — Set bit D7 ...

Page 11

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Fan Instantaneous Duty Cycle (0Ah) Read the fan instantaneous duty-cycle register to deter- mine the duty cycle at PWMOUT at any time. The POR state of the fan instantaneous duty-cycle register is ...

Page 12

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller Table 5. PWM Frequency Select (10h) PWM FREQUENCY SELECT A SELECT B (Hz 100 X 35k frequency setting is used for controlling fans that have ...

Page 13

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller The frequency-select register controls the frequency of the PWM signal. When the PWM signal modulates the power supply of the fan, a low PWM frequency (usually 33Hz) should be used to ensure ...

Page 14

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller The duty cycle is limited to the value in the fan maxi- mum duty-cycle register. If the duty-cycle value is larg- er than the maximum fan duty cycle, it can be set ...

Page 15

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller The effects of the ideality factor and series resistance are additive. If the diode has an ideality factor of 1.002 and series resistance the total offset can be cal- ...

Page 16

SMBus-Compatible Temperature Monitor with Automatic PWM Fan-Speed Controller GND 10 mils DXP 10 mils DXN GND Figure 9. Recommended DXP-DXN PC Traces Twisted-Pair and Shielded Cables Use a twisted-pair cable to connect the remote sensor for remote-sensor distance longer than ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2006 Maxim Integrated Products ...

Related keywords