ON MAX6502UKP075-T Ultra small temperature switch Datasheet

MAX6501, MAX6502
Ultra Small Temperature
Switch with Pin−Selectable
Hysteresis
The MAX6501 and MAX6502 are SOT-23 temperature switches
that require no external components and the design is facilitated with
factory- programmed temperature thresholds. A choice of
factory-trimmed temperature trip points are available. Pin selectable
hysteresis of +2°C or +10°C allows flexibility to the design. These
parts typically consume only 17 µA of current and operate over the
entire -55°C to +125°C temperature range while offering accuracies
of 0.5°C (typ) and 4°C (max).
The MAX6501 has an open drain, active low output, meant for
microprocessor reset control. The MAX6502 has a CMOS, active high
output designed to drive a logic level MOSFET to turn on a fan or
heater element.
The MAX6501/6502 are aimed for hot-temperature monitoring
(+45°C to +115°C). These devices assert a logic signal when the
temperature goes above the threshold.
The MAX6501 and MAX6502 are offered in five standard
temperature thresholds. Available in 5-Pin SOT-23A packages, these
parts are ideal for applications requiring high integration, small size,
low power and low installed cost.
http://onsemi.com
5
4
1
2
SOT-23A
CASE 1212
3
PIN CONNECTIONS
GND 1
GND 2
HYST 3
MAX6501
MAX6502
5 TOVER
(TOVER)*
4 VCC
*For MAX6502
Note: 5-Pin SOT-23A is equivalent to EIAJ SC-74A
Features
• 5-Pin SOT-23A
• Factory-Programmed Thresholds from +45°C to +115°C in 10°C
•
•
•
•
Increments
Pin-Selectable +2°C or +10°C Hysteresis
0.5°C (Typ) Threshold Accuracy Over Full Temperature Range
No External Components Required
17 µA Supply Current
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
Typical Applications
•
•
•
•
•
•
•
Thermal Management in PCs and Servers
Over Temperature Fail Safe Circuits
Simple Fan Controller
Temperature Alarms
Projectors/Printers
Notebook Computers
Network Boxes
 Semiconductor Components Industries, LLC, 2003
February, 2003 - Rev. 2
1
Publication Order Number:
MAX6501/D
MAX6501, MAX6502
MAXIMUM RATINGS*
Rating
Symbol
Value
Unit
VCC
-0.3 to +7.0
V
TOVER (MAX6501)
-
-0.3 to +7.0
V
TOVER (MAX6502)
-
-0.3 to (VCC +0.3)
V
All Other Pins
-
-0.3 to (VCC +0.3)
V
Input Current (All Pins)
-
20
mA
Output Current (All Pins)
-
20
mA
-
-55 to +125
°C
Tstg
-65 to +165
°C
Lead Temperature (Soldering, 10 seconds)
-
+300
°C
Power Dissipation (TA = +70°C)
(Derate 7.1 mW/°C Above +70°C)
-
571
mW
Supply Voltage
Operating Temperature Range
Storage Temperature Range
*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses
above 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 above 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 VCC = +2.7 V to +5.5 V, RPULL- UP = 100 KΩ (MAX6501 only), CCOUPLING = 100 pF from VCC
to GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
Characteristics
Supply Voltage Range
Test Conditions
Symbol
Min
Typ
Max
Unit
-
VCC
2.7
-
5.5
V
-
ICC
-
17
40
µA
Temperature Threshold Accuracy
(Note 1)
+45°C to +65°C
+75°C to +115°C
∆TTH
-4.0
-6.0
0.5
0.5
4.0
6.0
°C
Temperature Threshold Hysteresis
HYST = GND
HYST = VCC
THYST
-
2.0
10
-
°C
HYST Input Threshold
-
VIH
0.8 x VCC
-
-
V
HYST Input Threshold
-
VIL
-
-
0.2 x VCC
V
ISOURCE = 500 µA, VCC 2.7 V
(MAX6502 Only)
ISOURCE = 800 µA, VCC 4.5 V
(MAX6502 Only)
VOH
0.8 x VCC
-
-
V
VCC -1.5
-
-
Output Voltage Low
ISINK = 1.2 mA, VCC 2.7 V
ISINK = 3.2 mA, VCC 4.5 V
VOL
-
-
0.3
0.4
V
Open-Drain Output Leakage Current
VCC = 2.7 V, VTOVER = 5.5 V
(MAX6501 Only)
-
-
10
-
nA
Supply Current
Output Voltage High
1. The MAX6501 and MAX6502 are available with internal, factory-programmed temperature trip thresholds from +45°C to +115°C in +10°C
increments.
http://onsemi.com
2
MAX6501, MAX6502
PIN DESCRIPTION
MAX6501
MAX6502
Name
Description
1,2
1,2
GND
Ground. Ground both pins together close to the chip. Pin 2 provides the lowest thermal
resistance to the die.
3
3
HYST
Hysteresis Input. Connect HYST to GND for +2°C hysteresis, or connect to VCC for +10°C
hysteresis.
4
4
VCC
5
-
TOVER
Open-Drain, Active-Low Output. TOVER goes low when the die temperature exceeds the
factory-programmed temperature threshold. Connect to a 100 KΩ pull-up resistor. May be
pulled up to a voltage higher than VCC.
-
5
TOVER
Push/Pull Active-High Output. TOVER goes high when the die temperature exceeds the
factory-programmed temperature threshold.
Supply Input (+2.7 V to +5.5 V). Recommend 100 pF or greater Coupling capacitor from VCC
to GND.
Typical Operating Circuit
The MAX6501 is intended for applications with a
microprocessor reset input. The MAX6502 is intended for
applications of turning on a fan or heater element.
+2.7 V to +5.5 V
Hysteresis Input
100 pF
VCC
VCC
MAX6502
µP
TOVER
To prevent the output from “chattering’’ at or near the trip
point temperature, a selectable HYST input pin is provided.
Hysteresis can be externally selected at 2°C (HYST = GND)
or 10°C (HYST = VDD) by means of the CMOS compatible
HYST input pin. Do not let the HYST pin float as this could
cause increase supply current. The hysteresis does not
depend on the part’s programmed trip threshold.
INT
GND GND HYST
Table 1. Factory-Programmed Threshold Range
GND
Part Number
Threshold (TTH) Range
MAX6501
+45°C TTH +115°C
MAX6502
+45°C TTH +115°C
Thermal Considerations
With a very low 17 µA supply current, the MAX6501 and
MAX6502 dissipates very little power. Thus, the die
temperature is basically the same as the package
temperature. To minimize the error in temperature readings,
the load current should be limited to a few milliamps. As an
example, the typical thermal resistance of a 5-Pin SOT-23A
package is 140°C/W. If the MAX6501 had to sink 1.0 mA,
and the output voltage is guaranteed to be less than 0.3 V,
then an additional 0.3 mW of power is dissipated within the
IC. This corresponds to a 0.042°C rise in die temperature in
the 5-Pin SOT-23A.
DETAILED DESCRIPTION
The MAX6501 and MAX6502 integrate a temperature
sensor with a factory- programmed threshold switch. A logic
signal is asserted when the die temperature crosses the factory
programmed threshold. An external hysteresis input pin
allows the user to select either 2°C or 10°C hysteresis to give
further flexibility to the design of the application. The
MAX6501 and MAX6502 are intended for a temperature
range from 45°C to 115°C in a 10°C increment. The
MAX6501 has an open drain output and the MAX6502 has
a push/pull output stage.
http://onsemi.com
3
MAX6501, MAX6502
package can be placed directly under the socketed
microprocessor for improved thermal contact.
Temperature monitoring accuracy depends on the
thermal resistance between the device being monitored and
the temperature switch die. Heat flows primarily through
the leads onto the die. Pin 2 provides the lowest thermal
resistance to the die. To achieve the best temperature
monitoring results, the MAX6501 and MAX6502 should
be placed closest to the device being monitored. In
addition, a short and wide copper trace from Pin 2 to the
device should be used. In some cases, the 5- Pin SOT- 23A
APPLICATIONS
The MAX6501 has an open drain output and is therefore
intended to interface as a microprocessor reset input.
Moreover, the combination of these two devices can be used
to implement a temperature window alarm by wire- ORing the
outputs and using an external pull up resistor. (See Figure 1)
+5 V
RPULL- UP
100 k
Temperature Out of Range
100 pF
100 pF
VCC
VCC
MAX6501UKP115-T
MAX6501UKP055-T
GND GND HYST
GND GND HYST
Figure 1. Over and Under Temperature Alarm
fail safe measure could be designed by using a second
MAX6502 with a higher temperature threshold to alert the
user of an impending thermal shutdown, should the
temperature continue to rise. (See Figure 2)
The MAX6502 can be used to control a DC fan. The fan
turns on when the sensed temperature rises above the factory
set threshold and remains on until the temperature falls
below threshold minus the hysteresis selected. An additional
http://onsemi.com
4
MAX6501, MAX6502
+5 V
VCC
100 pF
MAX6502UKP095-T
GND
HEAT
GND
TEMPERATURE
FAULT
TOVER
HYST
µP
FAN
CONTROL
HEAT
VCC
TOVER
HYST
100 pF
MAX6502UKP055-T
GND GND
Figure 2. Fan Control Circuit with Over Temperature Alert
TOVER
+
V
TOVER
−
Positive
Tempco
Reference
MAX6501
With 100 kΩ Pull-Up
Negative
Tempco
Reference
HYST
Network
HYST
MAX6501
TEMP
COLD
+25°C
TTH
HOT
+
TOVER
V
TOVER
−
Positive
Tempco
Reference
MAX6502
Negative
Tempco
Reference
HYST
Network
HYST
MAX6502
TEMP
COLD
Figure 3. Functional Block Diagrams
http://onsemi.com
5
+25°C
TTH
HOT
MAX6501, MAX6502
TYPICAL CHARACTERISTICS
40
60
35
SUPPLY CURRENT (µA)
FREQUENCY
50
40
30
20
30
25
20
15
10
10
5
-3
-4
-2
-1
0
1
2
4
3
0
-60
5
-20
0
20
40
60
80
100 120 140
TEMPERATURE (°C)
Figure 4. Trip Threshold Accuracy
Figure 5. Supply Current vs. Temperature
80
180
140
OUTPUT SINK RESISTANCE (Ω)
VCC = 2.7 V
160
VCC = 4.0 V
120
100
VCC = 5.0 V
80
60
180
40
20
-40
ACCURACY (°C)
0
20
40
60
80
100
120
VCC = 2.7 V
VCC = 4.0 V
70
60
VCC = 5.0 V
50
40
30
20
10
0
140
0
10
20
30
40
50
60
70
80
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 6. MAX6502 Output Source Resistance
vs. Temperature
Figure 7. Output Sink Resistance
vs. Temperature
12
HYS = VCC
10
HYSTERESIS (°C)
OUTPUT SOURCE RESISTANCE (Ω)
0
-5
MAX6501/6502
8
6
4
HYS = GND
2
MAX6501/6502
0
-45
-25
-5
15
35
55
75
95
TRIP TEMPERATURE (°C)
Figure 8. Hysteresis vs. Trip Temperature
http://onsemi.com
6
115
90 100
MAX6501, MAX6502
TYPICAL CHARACTERISTICS
+100°C
+15°C/div
Mounted On 0.75 in2
of 2 oz. Copper
+25°C
5 sec/div
Figure 9. SOT-23 Thermal Step Response
in Perfluorinated Fluid
+100°C
+12.5°C/div
Mounted On 0.75 in2
of 2 oz. Copper
+25°C
20 sec/div
Figure 10. SOT-23 Thermal Step Response
in Still Air
http://onsemi.com
7
MAX6501, MAX6502
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
USER DIRECTION OF FEED
DEVICE
MARKING
PIN 1
Standard Reel Component Orientation
TR Suffix Device
(Mark Right Side Up)
PIN 1
USER DIRECTION OF FEED
DEVICE
MARKING
W = Width
of Carrier
Tape
P = Pitch
Reverse Reel Component Orientation
RT Suffix Device
(Mark Upside Down)
Carrier Tape, Reel Size, and Number of Components Per Reel
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-23A
8 mm
4 mm
3000
7 inches
http://onsemi.com
8
MAX6501, MAX6502
MARKING DIAGRAM
1
2
3
4
1 and 2
3
= Two Letter Part Number Codes
= Year and Two-Month Period Code
4
= Lot ID Number
ORDERING INFORMATION
Device
Package
MAX6501UKP045-T
MAX6501UKP055-T*
MAX6501UKP065-T
MAX6501UKP075-T
MAX6501UKP085-T
MAX6501UKP095-T*
MAX6501UKP105-T
MAX6501UKP115-T*
MAX6502UKP045-T
MAX6502UKP055-T*
MAX6502UKP065-T
MAX6502UKP075-T
MAX6502UKP085-T
MAX6502UKP095-T*
MAX6502UKP105-T
MAX6502UKP115-T*
5 Pin SOT-23A
SOT 23A
5-Pin
Standard
Temperature
Threshold
Output Stage
1 and 2
45°C
55°C
65°C
75°C
85°C
95°C
105°C
115°C
Open Drain
Open Drain
Open Drain
Open Drain
Open Drain
Open Drain
Open Drain
Open Drain
HA
HB
HC
HD
HE
HF
HG
HH
45°C
55°C
65°C
75°C
85°C
95°C
105°C
115°C
Push/Pull
Push/Pull
Push/Pull
Push/Pull
Push/Pull
Push/Pull
Push/Pull
Push/Pull
JA
JB
JC
JD
JE
JF
JG
JH
Marking
*Default: Contact your ON Semiconductor sales representative for other temperature threshold options.
http://onsemi.com
9
Shipping
3000 Units Tape and Reel
MAX6501, MAX6502
Notes
http://onsemi.com
10
MAX6501, MAX6502
PACKAGE DIMENSIONS
SOT-23
CASE 1212-01
ISSUE O
A
5
E
1
A2
0.05 S
B
D
A1
4
2
L
3
E1
L1
B
e
e1
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DATUM C IS A SEATING PLANE.
C
5X
0.10
M
C B
S
A
S
C
http://onsemi.com
11
DIM
A1
A2
B
C
D
E
E1
e
e1
L
L1
MILLIMETERS
MIN
MAX
0.00
0.10
1.00
1.30
0.30
0.50
0.10
0.25
2.80
3.00
2.50
3.10
1.50
1.80
0.95 BSC
1.90 BSC
0.20
−−−
0.45
0.75
MAX6501, MAX6502
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make
changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death
may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
Literature Fulfillment:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada
Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada
Email: [email protected]
JAPAN: ON Semiconductor, Japan Customer Focus Center
2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051
Phone: 81-3-5773-3850
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
N. American Technical Support: 800-282-9855 Toll Free USA/Canada
http://onsemi.com
12
MAX6501/D
Similar pages