MAX6687AU40L+ Maxim Integrated Products, MAX6687AU40L+ Datasheet

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MAX6687AU40L+

Manufacturer Part Number
MAX6687AU40L+
Description
Board Mount Temperature Sensors Local/Remote Temperature Switch
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6687AU40L.pdf (7 pages)

Specifications of MAX6687AU40L+

Temperature Threshold
+ 120 C
Full Temp Accuracy
+/- 3.5 C, +/- 1.5 C
Package / Case
uSOP
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Output Type
Digital
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX6687/MAX6688 comprise a remote-junction
temperature switch and a local temperature switch in a
single package. The remote-junction switch uses an
external P-N junction (typically a diode-connected tran-
sistor on the die of an external CPU, ASIC, or FPGA) as
a sensing element to measure the remote temperature.
The remote-junction temperature switch has a factory-
programmed trip temperature threshold of either
+120°C or +125°C. The local temperature switch has a
pin-programmable temperature threshold that is set by
connecting pins S1 and S2 to ground, to V
ing them floating. Hysteresis for both local and remote
thresholds is 5°C. The MAX6687/MAX6688 do not
assert on transient (single-sample) faults or when
power is first applied.
The MAX6687 has two open-drain active-low outputs
while the MAX6688 has two push-pull active-high out-
puts. T
temperature exceeds the factory-programmed +120°C
or +125°C trip threshold. T
die temperature exceeds the pin-programmed thresh-
old, which is controlled by pins S1 and S2. The local
thresholds are available in two ranges in 5°C incre-
ments. The two ranges are +40°C to +80°C and +75°C
to +115°C.
The MAX6687/MAX6688 operate from a 3.0V to 5.5V
power supply and are available in a space-saving 8-pin
µMAX package.
19-2636; Rev 2; 11/03
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.
CPU Temperature Protection
FPGA Temperature Protection
Fan Control
Temperature Alarms
REMOTE
asserts a logic signal when the remote
Local/Remote Temperature Switches in a
P
________________________________________________________________ Maxim Integrated Products
General Description
C
S
DXP
DXN
S1
S2
LOCAL
MAX6687
GND
3.3V
V
DD
is asserted when the
Applications
T
REMOTE
T
LOCAL
DD
3.3V
, or leav-
TO SYSTEM
SHUTDOWN
o Pin-Programmable Local Temperature Threshold
o Factory-Programmed Remote Threshold:
o Open-Drain Active-Low Outputs (MAX6687)
o CMOS Push-Pull, Active-High Outputs (MAX6688)
o ±1.5°C Accuracy
o 2Hz Temperature Sampling Rate
o 215µA Average Supply Current
o 3.0V to 5.5V Power-Supply Voltage
o 8-Pin µMAX Package
Pin Configurations/Functional Diagrams/Selector Guide
appear at end of data sheet.
MAX6687AU40L
MAX6687AU40H
MAX6687AU75L
MAX6687AU75H
MAX6688AU40L
MAX6688AU40H
MAX6688AU75L
MAX6688AU75H
in 5°C Increments in Two Distinct Ranges: +40°C
to +80°C and +75°C to +115°C
+120°C (L Suffix) or +125°C (H Suffix)
P
PART
C
S
Typical Operating Circuit
DXP
DXN
S1
S2
µMAX Package
MAX6688
GND
3.3V
V
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
-40 C to +125 C
Ordering Information
DD
TEMP RANGE
T
REMOTE
T
LOCAL
SHUTDOWN
TO SYSTEM
12V
PIN-PACKAGE
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
8 µMAX
Features
N
1

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MAX6687AU40L+ Summary of contents

Page 1

... S DXN GND ________________________________________________________________ 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. o Pin-Programmable Local Temperature Threshold in 5°C Increments in Two Distinct Ranges: +40°C to +80°C and +75°C to +115°C o Factory-Programmed Remote Threshold: +120° ...

Page 2

Local/Remote Temperature Switches in a µMAX Package ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND ............................................-0.3V to +6V DD LOCAL REMOTE DXN .......................................................................-0.3V to +0.8V All Other Pins..............................................-0. Input Current .........................................................................5mA Output Current ....................................................................20mA ...

Page 3

Local/Remote Temperature Switches in a ELECTRICAL CHARACTERISTICS (continued 5.5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Temperature Conversion Time Temperature Sample Period Current Sourcing for External ...

Page 4

Local/Remote Temperature Switches in a µMAX Package PIN NAME MAX6687 MAX6688 Power-Supply Input. Bypass to GND with a 0.1µF capacitor GND Ground This pin connects to the positive (anode) terminal of the external P-N ...

Page 5

Local/Remote Temperature Switches in a Table 1. Local Temperature Trip Threshold Selection MAX6687AUA40L/MAX6687AUA40H/ MAX6688AUA40L/MAX6688AUA40H S1 S2 LOCALTEMPERATURE TRIP THRESHOLD ( C) GND GND GND FLOAT GND V DD FLOAT GND FLOAT FLOAT FLOAT GND DD V FLOAT ...

Page 6

Local/Remote Temperature Switches in a µMAX Package TOP VIEW GND 2 DXP 3 DXN REMOTE +120 C OR +125 C DXP REMOTE MAX6687 TEMPERATURE CONVERTER DXN LOCAL TEMPERATURE CONVERTER S1 T REMOTE +40 ...

Page 7

... 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 _____________________ 7 © 2003 Maxim Integrated Products ...

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