MAX6670AUB50+ Maxim Integrated Products, MAX6670AUB50+ Datasheet

IC TEMP SENSOR REMOTE 10-UMAX

MAX6670AUB50+

Manufacturer Part Number
MAX6670AUB50+
Description
IC TEMP SENSOR REMOTE 10-UMAX
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6670AUB40.pdf (8 pages)

Specifications of MAX6670AUB50+

Function
Fan Control, Temp Monitor
Topology
Fan Control
Sensor Type
External
Sensing Temperature
50°C Trip Point
Output Type
Digital
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Temperature Threshold
+ 50 C
Full Temp Accuracy
+/- 1 C
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6668/MAX6670 remote-junction thermal
switches with an internal power transistor drive a cool-
ing fan rated for supply voltages up to +12V and
250mA. These devices measure the temperature of an
external P-N junction (typically a diode-connected tran-
sistor) and turn on the fan power switch when the
remote temperature rises above a factory-programmed
threshold. Self-contained and requiring no software
development, the MAX6668/MAX6670 are simple
“drop-in” fan-control solutions for a variety of systems.
The MAX6670 features an open-drain WARN output
that goes active when the remote temperature exceeds
the factory-programmed fan activation threshold by
+15°C. The MAX6670 features an open-drain OT output
that goes active when the remote temperature exceeds
the factory-programmed threshold by +30°C. The
MAX6668/MAX6670 provide a fan-control input,
FORCEON, that allows the fan to be driven externally,
regardless of temperature.
Available temperature thresholds range from +40°C to
+75°C in 5°C increments. Hysteresis is preset to 8°C on
the MAX6668 or pin selectable to 4°C, 8°C, or 12°C
using a three-level logic input on the MAX6670.
Temperature threshold accuracy is ±1°C (typ) and
±2.2°C (max) for remote-junction temperatures from
+40°C to +75°C.
The MAX6668/MAX6670 operate from a +3V to +3.6V
power supply, and are specified over the automotive
temperature range (-40°C to +125°C). The MAX6668 is
offered in an 8-pin µMAX package and the MAX6670 is
available in a space-saving 10-pin µMAX package.
19-2133; Rev 2; 11/02
Pin Configuration appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
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.
Remote Temperature Switches with Integrated
Notebook and Desktop Computers
Network Switches
PC Power Supplies
Laboratory Instruments
Card Racks
Temperature Alarms
Fan Controls
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o +12V, 250mA Integrated Fan Driver
o No Calibration Required
o Pin-Selectable 4°C, 8°C, or 12°C Hysteresis
o Factory-Programmed Temperature Thresholds
o Overtemperature Warning Signals
o 110µA (typ) Supply Current
o Space-Saving 8-Pin and 10-Pin µMAX Packages
Ordering Information continued at end of data sheet.
MAX6668AUA40 -40°C to +125°C
MAX6668AUA45 -40°C to +125°C
MAX6668AUA50 -40°C to +125°C
MAX6668AUA60 -40°C to +125°C
MAX6668AUA70 -40°C to +125°C
MAX6668AUA75 -40°C to +125°C
(MAX6670)
from +40°C to +75°C
2N3904
Fan Controller/Driver
PART
2200pF
C
S
Typical Application Circuit
HYST
DXP
DXN
GND
RANGE
Ordering Information
TEMP
MAX6670
+3.3V
PGND
V
DD
FORCEON
FANOUT
WARN
OT
PA C K A G E
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
PI N -
250mA
FAN
10k
10k
V
V
Features
DD
DD
V
DD
T H R ESH -
+12V
O L D
( ° C )
40
45
50
60
70
75
1

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MAX6670AUB50+ Summary of contents

Page 1

... Temperature Alarms Fan Controls Pin Configuration appears at end of data sheet. Typical Operating Circuit appears at end of data sheet. ________________________________________________________________ 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. Fan Controller/Driver o +12V, 250mA Integrated Fan Driver o No Calibration Required o Pin-Selectable 4° ...

Page 2

Remote Temperature Switches with Integrated Fan Controller/Driver ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD 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 ...

Page 3

Remote Temperature Switches with Integrated ELECTRICAL CHARACTERISTICS (continued +3V to +3.6V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL FORCEON Input Low Voltage FORCEON Input Bias Current WARN, OT ...

Page 4

Remote Temperature Switches with Integrated Fan Controller/Driver PIN NAME MAX6668 MAX6670 1 1 PGND FORCEON DXP 4 4 DXN GND FANOUT 8 10 WARN — — 6 ...

Page 5

Remote Temperature Switches with Integrated trip temperature. As the cooling fan operates, the cir- cuit board temperature should decrease, which causes the external P-N junction’s temperature to decrease. When the P-N junction’s temperature is equal to the trip threshold minus ...

Page 6

Remote Temperature Switches with Integrated Fan Controller/Driver TRIP TEMPERATURE TRIP TEMPERATURE – HYSTERESIS FANOUT MAX6668 MAX6670 Figure 1. Temperature Trip Threshold Hysteresis GND 10MILS DXP 10MILS DXN GND Figure 2. Recommended DXP/DXN PC Traces Typical Operating Circuit +3V TO +3.6V ...

Page 7

Remote Temperature Switches with Integrated DXP C S DXN HYST FORCEON DXP C S DXN FORCEON _______________________________________________________________________________________ Fan Controller/Driver V DD TEMP SENSOR T FAN HYSTERESIS T FAN +15 C MAX6670 T FAN +30 ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products ...

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