OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX6687AU75L+

P1-P3P4-P6P7-P7
General Description
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
DD
, or leav-
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
REMOTE
asserts a logic signal when the remote
temperature exceeds the factory-programmed +120°C
or +125°C trip threshold. T
LOCAL
is asserted when the
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.
Applications
CPU Temperature Protection
FPGA Temperature Protection
Fan Control
Temperature Alarms
Features
♦ Pin-Programmable Local Temperature Threshold
in 5°C Increments in Two Distinct Ranges: +40°C
to +80°C and +75°C to +115°C
♦ Factory-Programmed Remote Threshold:
+120°C (L Suffix) or +125°C (H Suffix)
♦ Open-Drain Active-Low Outputs (MAX6687)
♦ CMOS Push-Pull, Active-High Outputs (MAX6688)
♦ ±1.5°C Accuracy
♦ 2Hz Temperature Sampling Rate
♦ 215µA Average Supply Current
♦ 3.0V to 5.5V Power-Supply Voltage
♦ 8-Pin µMAX Package
MAX6687/MAX6688
Local/Remote Temperature Switches in a
µMAX Package
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
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.
Pin Configurations/Functional Diagrams/Selector Guide
appear at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX6687AU40L -40°C to +125°C 8 µMAX
MAX6687AU40H -40°C to +125°C 8 µMAX
MAX6687AU75L -40°C to +125°C 8 µMAX
MAX6687AU75H -40°C to +125°C 8 µMAX
MAX6688AU40L -40°C to +125°C 8 µMAX
MAX6688AU40H -40°C to +125°C 8 µMAX
MAX6688AU75L -40°C to +125°C 8 µMAX
MAX6688AU75H -40°C to +125°C 8 µMAX
DXP
GND
S2
DXN
V
DD
3.3V
S1
TO SYSTEM
SHUTDOWN
C
S
3.3V
12V
N
MAX6687
T
REMOTE
T
LOCAL
DXP
GND
S2
DXN
V
DD
3.3V
S1
C
S
MAX6688
T
REMOTE
T
LOCAL
TO SYSTEM
SHUTDOWN
µP µP
Typical Operating Circuit
MAX6687/MAX6688
Local/Remote Temperature Switches in a
µMAX Package
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 3V to 5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
DD
= 3.3V and T
A
= +25°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.
Voltages Referenced to GND
V
DD
, T
LOCAL
, T
REMOTE
............................................-0.3V to +6V
DXN .......................................................................-0.3V to +0.8V
All Other Pins..............................................-0.3V to (V
DD
+ 0.3V)
Input Current .........................................................................5mA
Output Current ....................................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
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
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Power-Supply Range V
DD
3 5.5 V
Average Supply Current I
DD
215 500 µA
Supply Current During
Conversion
400 800 µA
Power-On Reset (POR) Threshold POR V
DD
falling edge 1 1.5 2.0 V
POR Threshold Hysteresis 50 mV
T
A
= +25°C, V
DD
= 3.3V -1.5 +1.5
T
A
= 0°C to +85°C, V
DD
= 3.3V -3.0 +3.0
Remote-Diode Temperature
Threshold Accuracy, Rising
Temperature
∆T
TH
T
A
= -40°C to +125°C, V
DD
= 3.3V -5.0 +5.0
°C
Temperature trip thresholds from +40°C to
+105°C, V
DD
= 3.3V
-3.0 +3.0
Internal Temperature Threshold
Accuracy, Rising Temperature
∆T
TH
Temperature trip thresholds +110°C and
+115°C, V
DD
= 3.3V
-3.5 +3.5
°C
Temperature Threshold
Hysteresis
T
HYST
5.0 °C
Temperature Threshold Supply
Sensitivity
0.6 °C/V
Output Voltage High V
OH
I
SOURCE
= 1mA, MAX6688 V
DD
- 0.2 V
Output Voltage Low V
OL
I
SINK
= 1mA 0.2 V
Logic Input Low Voltage
(S1, S2)
V
IL
0.4 V
Logic Input High Voltage
(S1, S2)
V
IH
1.8 V
Input Current (S1, S2) 10 µA
Open-Drain Output Leakage
Current
V
OUT
= 5.5V, MAX6687 1 µA
MAX6687/MAX6688
Local/Remote Temperature Switches in a
µMAX Package
_______________________________________________________________________________________ 3
Note 1: All parameters are tested at +25°C. Temperature specifications over a range of -40°C to +125°C are guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3V to 5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
DD
= 3.3V and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Temperature Conversion Time 0.2 0.25 0.3 s
Temperature Sample Period 0.4 0.5 0.6 s
High level 80 100 120
Current Sourcing for External
Diode
Low level 8 10 12
µA
Typical Operating Characteristics
(V
DD
= 3.3V, C
S
= 2200pF, T
A
= +25°C, unless otherwise noted.)
AVERAGE SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
MAX6687/88 toc01
AMBIENT TEMPERATURE (°C)
AVERAGE SUPPLY CURRENT (µA)
1007550250-25
140
180
220
260
300
100
-50 125
AVERAGE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6687/88 toc02
SUPPLY VOLTAGE (V)
AVERAGE SUPPLY CURRENT (µA)
5.04.54.03.5
140
180
220
260
300
100
3.0 5.5
T
A
= +100
°
C
T
A
= -40
°
C
T
A
= +25
°
C
TEMPERATURE TRIP THRESHOLD ERROR
vs. C
S
CAPACITANCE
MAX6687/88 toc03
C
S
CAPACITANCE (nF)
TEMPERATURE TRIP THRESHOLD ERROR (°C)
10
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
1 100
MAX6688U40H
S1 = S2 = FLOAT
REMOTE TEMPERATURE TRIP THRESHOLD
ERROR vs. AMBIENT TEMPERATURE
MAX6687/88 toc04
AMBIENT TEMPERATURE (°C)
UPPER TRIP THRESHOLD ERROR (°C)
7550250-25
-4
-3
-2
-1
0
1
-5
-50 100
MAX6688U40H
T
REMOTE
TRIP = +125°C
P1-P3P4-P6P7-P7

MAX6687AU75L+

Mfr. #:
Buy MAX6687AU75L+
Manufacturer:
Maxim Integrated
Description:
IC SW TEMP REMOTE 8-UMAX
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet