Operating Temperature Range ......................... -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Soldering Temperature (reflow) .......................................+260vC
Lead Temperature (soldering, 10s) ................................. +300°C
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.
Electrical Characteristics
(V
CC
= +2.7V to +5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Supply Current
Temperature Threshold
Accuracy
Temperature Threshold
Hysteresis
HYST Input Leakage
HYST Input Threshold
OUT Impedance to V
CC
Output Voltage High
Output Voltage Low
Open-Drain Output Leakage
Current
OUTSET Voltage
V
OH
V
OL
I
OUT
V
IH
V
IL
OUTSET = unconnected (MAX6510)
I
OUT
= 5mA, OUTSET = GND or V
CC
I
OUT
= 5mA
V
OUT
= V
CC
(MAX6509)
OUT, active low
V
OUTSET
MAX6510
OUT, active high
OUT, open drain
V
OUTSET
= GND
OUTSET Current
I
OUTSET
MAX6510
V
OUTSET
= V
CC
OUTSET = unconnected
0.85
·
V
CC
0.72
·
V
CC
0.55
·
V
CC
-5.5
5.5
±0.1
µA
60
SYMBOL
V
CC
MAX6509
I
CC
OUTSET = GND or V
CC
(MAX6510)
OUTSET = unconnected, OUT = low
ΔT
TH
T
HYST
T
A
= 0°C to +125°C
T
A
= -40°C to 0°C
HYST = GND
HYST = V
CC
CONDITIONS
MIN
2.7
32
47
97
±0.5
±0.5
2
10
1
V
CC
- 0.4
0.4
100
V
CC
- 0.4
0.3
10
0.2
·
V
CC
V
160
TYP
MAX
5.5
50
80
165
±4.7
±3.7
°C
°C
µA
V
kW
V
V
µA
UNITS
V
µA
Note 1:
100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
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Maxim Integrated │ 2
MAX6509/MAX6510
Resistor-Programmable
SOT Temperature Switches
Typical Operating Characteristics
(V
CC
= +5V, R
PULL-UP
= 10kW (MAX6509 only), T
A
= +25°C, unless otherwise noted.)
MAX6509/10 toc01
45
SUPPLY CURRENT (µA)
40
35
30
25
20
15
10
V
CC
= +3.3V
V
CC
= +5V
150
140
R
SET
(kΩ)
130
120
110
V
CC
= +2.7V
R
SET
= 0
OUTSET = GND (MAX6510)
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
100
90
-40
-35
-30
-25
-20
-15
-10
-5
0
TEMPERATURE (°C)
90
80
70
R
SET
(kΩ)
60
50
40
30
20
10
0
0
20
40
60
80
100
120
MAX6509/10 toc03
0.15
SET POINT OFFSET (
°
C)
0.10
0.05
0
-0.05
-0.10
-0.15
V
CC
= +2.7V
-50
-25
0
25
50
V
CC
= +3.3V
V
CC
= +5V
V
CC
= +2.7V
V
CC
= +3.3V
140
-0.20
75
100
125
TEMPERATURE (°C)
TEMPERATURE (°C)
TRIP POINT ERROR
vs. SET TEMPERATURE
MAX6509/10 toc05
HYSTERESIS vs. TEMPERATURE
HYST = V
CC
MAX6509/10 toc06
1.0
0.9
0.8
ERROR
(
°
C)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-40 -25
0
V
CC
= +5V
1% R
SET
SET RESISTOR TEMPCO
12
10
HYSTERESIS
°
C)
8
6
4
HYST = GND
2
R
SET
200ppm
100ppm
50ppm
25
50
75
100
125
TEMPERATURE (°C)
0
-40
-25
0
25
50
75
100
125
TEMPERATURE (°C)
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Maxim Integrated │ 3
MAX6509/10 toc04
100
R
SET
vs. TEMPERATURE
(T
A
= 0°C TO +125°C)
0.20
TRIP THRESHOLD OFFSET
vs. TEMPERATURE
MAX6509/10 toc02
50
SUPPLY CURRENT vs. TEMPERATURE
160
R
SET
vs. TEMPERATURE
(T
A
= -40
°
C TO 0
°
C)
MAX6509/MAX6510
Resistor-Programmable
SOT Temperature Switches
Pin Description
PIN
MAX6509 MAX6510
1
2
3
—
4
5
1
2
—
3
4
6
NAME
SET
GND
OUT
OUT,
OUT
HYST
V
CC
OUTSET
FUNCTION
Temperature Set Point. Connect an external 1% resistor from SET to GND to set trip point.
Ground
Open-Drain Output. Reset to high impedance during power-on.
Open-Drain with Internal Pull-Up Resistor, Active-High, or Active-Low Output.
See Table 1. Reset to deassert during power-on.
Hysteresis Selection. Hysteresis is 10°C for HYST = V
CC
, 2°C for HYST = GND.
Power-Supply Input
Trilevel Control Input:
OUTSET =
V
CC
sets OUT to active high.
OUTSET = GND sets OUT to active low.
OUTSET = Unconnected sets OUT to open drain with internal pull-up resistor.
—
5
Detailed Description
Hysteresis Input
The MAX6509/MAX6510 fully integrated temperature
switches incorporate two temperature-dependent refer-
ences and one comparator. One reference exhibits a
positive temperature coefficient, and the other has a
negative temperature coefficient. The temperature at
which the two reference voltages are equal determines
the temperature trip point. Pin-selectable 2°C or 10°C
hysteresis keeps the output from oscillating when the
temperature is close to the threshold. The MAX6509
has an active-low, open-drain output structure that can
only sink current. The MAX6510 has three different out-
put options from which to choose (Table 1).
The MAX6509/MAX6510 are programmable for a wide
range of temperature thresholds from -40°C to +125°C.
The temperature threshold is set by an external resis-
tor between SET and GND. The MAX6509 output easily
interfaces with a microprocessor (µP) reset input
(Figure 2). The MAX6510 output is intended for applica-
tions such as driving a fan control switch (Figure 3).
The HYST pin is a CMOS-compatible input that selects
hysteresis at either a high level (10°C for HYST = V
CC
)
or a low level (2°C for HYST = GND). Hysteresis prevents
the output from oscillating when the temperature is near
the trip point. Do not leave HYST unconnected. Connect
HYST to GND or V
CC
. Other input voltages cause
increased supply current.
Choose the set-hot temperature (H) or set-cold tempera-
ture (C) option to ensure that the trip point is accurate
and the hysteresis is in the right direction. A MAX6509
or MAX6510 with the H suffix will first trip at the correct
point when temperature is increasing. For example, a
MAX6509HAUK+T or MAX6510HAUT+T with its trip
point set to 100°C will assert when its temperature rises
above +100°C, and will not deassert until its tempera-
ture drops below +100°C minus the selected hysteresis
value (e.g., +98°C if 2°C hysteresis is chosen). Con-
versely, if the trip temperature of a MAX6509CAUK+T
or MAX6510CAUT+T is -40°C, the output asserts at
-40°C as temperature falls, and deasserts when tem-
perature rises above -40°C plus the hysteresis value (e.g.,
-38°C if 2°C hysteresis is chosen) as shown in Figure 4.
Table 1. MAX6510 OUTSET-Selectable
Outputs
OUTSET
Connected to
V
CC
Connected to GND
Unconnected
OUT
Active high
Active low
Open drain with internal
pull-up resistor
Output Selection
The MAX6509 provides an open-drain output. The
MAX6510 features three output options selectable by
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