MAXIM MAX6505 User Manual

General Description
The MAX6505–MAX6508 temperature switches have dual logic outputs that assert when the die temperature cross­es their trip thresholds. Trip thresholds are factory pro­grammed to convenient temperatures in 5°C increments.
The MAX6505/MAX6506 have an ALARM output that asserts when the temperature is above the factory-pro­grammed thresholds (available from -40°C to +125°C). They also have a WARN output that asserts when the temperature is several degrees below the ALARM thresh­old. The difference between the ALARM and WARN thresholds (ΔT
AW
) is pin selectable to +5°C, +10°C, +20°C, or +30°C. The MAX6505’s logic outputs are open drain, while the MAX6506’s logic outputs are push-pull.
The MAX6507 has open-drain outputs (OVER, OK), and the MAX6508 has push-pull outputs (OVER, OK), each with two factory-programmed threshold temperatures (T
OVER
and T
UNDER
) in the wide range of -40°C to +125°C. The overtemperature output asserts when the temperature is above T
OVER
. When the temperature is in
the desired window (less than T
OVER
and greater than
T
UNDER
), OK (OK) asserts.
The MAX6505–MAX6508 are accurate to ±0.5°C (typ), ±5.5°C (max). Operating from a +2.5V to +5.5V supply, these low-cost devices typically consume 30µA supply current and require no external components for setting trip points. The MAX6505–MAX6508 are available in a 6-pin SOT23 package.
________________________Applications
µP Temperature Monitoring in High-Speed Computers
Temperature Control
Temperature Alarms
Fan Control
Features
±0.5°C (typ) Threshold Accuracy Over Full
Temperature Range
No External Components RequiredLow Cost
30µA (typ) Supply CurrentFactory-Programmed Thresholds from -40°C to
+125°C in 5°C Increments
Open-Drain Outputs (MAX6505/MAX6507),
Push-Pull Outputs (MAX6506/MAX6508)
Pin Selectable 2°C, 10°C Hysteresis
(MAX6507/MAX6508)
Pin Selectable +5°C, +10°C, +20°C, +30°C
T
ALARM
- T
WARN
(MAX6505/MAX6506)
SOT23 Package
Note: To complete the suffix information for the MAX6505/ MAX6506, add P or N for positive or negative trip tempera­ture, and select an available trip point in degrees centigrade. For example, the MAX6505UTP055+T describes a MAX6505 in a SOT23 package with a +55°C threshold (Table 3). Contact the factory for pricing and availability of temperature versions (minimum order 10,000 pieces). To complete the suffix information for MAX6507/MAX6508, see Table 4.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX6505–MAX6508
Dual Trip SOT Temperature Switches
________________________________________________________________
Maxim Integrated Products
1
Pin Configurations
19-1712; Rev 1; 2/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
Selector Guide appears at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX6505UT_ _ _ _+T
MAX6506UT_ _ _ _+T
MAX6507UT_ _ _ _+T
MAX6508UT_ _ _ _+T -40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
TOP VIEW
WARN
(WARN)
GND
( ) ARE FOR MAX6506.
+
16
MAX6505
2
MAX6506
S1
34
SOT23
5 S0
ALARM (ALARM)
V
CC
+
OK
16
(OK)
GND
S0
MAX6507
2
MAX6508
34
SOT23
OVER (OVER)
5 N.C.
V
CC
( ) ARE FOR MAX6508.
MAX6505–MAX6508
Dual Trip SOT Temperature Switches
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +2.5V to +5.5V, R
PULLUP
= 100kΩ (MAX6505/MAX6507 only), TA= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C and VCC= +5V, unless otherwise noted.) (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.
Supply Voltage (VCCto GND) ..................................-0.3V to +6V
S1, S0 to GND ............................................-0.3V to (V
CC
+ 0.3V)
All Other Pins to GND.................................-0.3V to (V
CC
+ 0.3V)
Input/Output Current, All Pins...........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
SOT23 (derate 8.7mW/°C above +70°C)....................696mW
Operating Temperature Range (T
MIN
to T
MAX
) ..-40°C to +125°C
Thermal Resistance (θ
JA
)...............................................115°C/W
Storage Temperature Range .............................-65°C to +150°C
Maximum Die Temperature..............................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
Supply Current I
Temperature Threshold Accuracy (Note 2)
Delta Temperature
ALARM
-T
WARNING
(T MAX6505/MAX6506
Temperature Threshold Hysteresis (Note 3)
)
CC
S0 = S1 = GND
CC
S0 = GND
MAX6505/ MAX6506
MAX6507/ MAX6508
-40°C to 0 ° C -5.5 ±0.5 5.5
ΔT
0°C to +95 ° C -3.5 ±0.5 3.5
TH
+95°C to +125 ° C -4 ±0.5 4
S1 = GND, S0 = GND 5
ΔT
S1 = GND, S0 = V
AW
S1 = VCC, S0 = GND 20
S1 = VCC, S0 = V
CC
CC
ALARM (MAX6505/MAX6506) 2
ΔTAW = 5°C or 10°C
ΔT
AW
30°C
= 20°C or
T
HYST
WARN (MAX6505/MAX6506)
2.5 5.5 V
40 80
30 60
10
30
5
10
μA
°C
°C
°C
OK, OVER
S0 = GND 2
(MAX6507/MAX6508)
Output Voltage High (MAX6506/MAX6508)
Output Voltage Low V
S0 = V
CC
V
IH
V
IL
I
SOURCE
V
OH
I
SOURCE
I
OL
SINK
I
SINK
= 500μA, VCC > 2.5V
= 800μA,VCC > 4.5V
= 3.2mA, V
= 5mA, V
> 2.5V 0.5
CC
> 4.5V 0.5
CC
0.8 x V
CCLogic Input Levels (S1, S0)
0.8 x V
CC
V
CC
-1.5
10
V
0.8
V
V
MAX6505–MAX6508
Dual Trip SOT Temperature Switches
_______________________________________________________________________________________
3
Typical Operating Characteristics
(V
CC
= +5V, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +2.5V to +5.5V, R
PULLUP
= 100kΩ (MAX6505/MAX6507 only), TA= -40°C to +125°C, unless otherwise noted. Typical values
are at T
A
= +25°C and VCC= +5V, unless otherwise noted.) (Note 1)
Note 1: 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2: T
ALARM
, T
UNDER
, and T
OVER
are factory-programmed temperature trip thresholds from -40°C to +125°C in 5°C increments.
Note 3: Temperature threshold hysteresis is defined as the difference from positive-going temperature thresholds minus the nega-
tive-going temperature thresholds.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Open-Drain Output Leakage Current
VCC = 5.5V, V V
= 5.5V (MAX6505)
WARN
= 5.5V, VOK = 5.5V,
V
CC
= 5.5V (MAX6507)
V
OVER
ALARM
= 5.5V,
1
1
SUPPLY CURRENT
vs. TEMPERATURE
50
VCC = +5V
= 100kΩ
R
PULLUP
45
40
35
30
SUPPLY CURRENT (µA)
25
20
-40 -10 5 20-25 35 50 65 80 95 110 125 TEMPERATURE (°C)
MAX6505/8-01
HYSTERESIS vs. TRIP TEMPERATURE
2.5 VCC = +5V
= 100kΩ
R
PULLUP
2.0
1.5
HYSTERESIS (°C)
1.0
0.5
-40 -10 5-25 20 35 50 65 80 95 110 125 TEMPERATURE (°C)
0.1
MAX6505/8-02
0
-0.1
-0.2
-0.3
-0.4
-0.5
TRIP-POINT ERROR (%)
-0.6
-0.7
-0.8
TRIP-POINT ERROR (%)
vs. SUPPLY VOLTAGE
NORMALIZED TO TRIP-POINT TEMPERATURE AT V
2.5 3.53.0 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V)
CC
= +5V
μA
MAX6505/8-03
MAX6505
STARTUP DELAY
)
(T > T
TH
100µs/div
= 100kΩ
PULLUP
MAX6505/8-05
A
2V/div
B
A: V B: ALARM VOLTAGE, R
MAX6505
STARTUP AND POWER-DOWN
)
(T < T
TH
100µs/div
PULSE
CC
PULLUP
= 100kΩ
MAX6505/8-04
A
2V/div
B
A: V B: ALARM VOLTAGE, R
CC
PULSE
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