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Part: MAX6508
Category:
Analog & Mixed-Signal Processing
Description: Dual Trip Sot Temperature Switches
Company: Maxim Integrated Products
Datasheet: Download MAX6508 datasheet File size : 368 kB
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Datasheet text preview:
19-1712; Rev 1; 4/00
Dual Trip SOT Temperature Switches
General Description
The MAX6505MAX6508 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 (TAW) 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 (TOVER and TUNDER) in the wide range of -40°C to +125°C. The overtemperature output asserts when the temperature is above TOVER. When the temperature is in the desired window (less than TOVER and greater than TUNDER), OK (OK) asserts. The MAX6505MAX6508 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 MAX6505MAX6508 are available in a 6pin SOT23 package.
Features
o ±0.5°C (typ) Threshold Accuracy Over Full Temperature Range o No External Components Required o Low Cost o 30µA (typ) Supply Current o Factory-Programmed Thresholds from -40°C to +125°C in 5°C Increments o Open-Drain Outputs (MAX6505/MAX6507), Push-Pull Outputs (MAX6506/MAX6508) o Pin Selectable +2°C, +10°C Hysteresis (MAX6507/MAX6508) o Pin Selectable +5°C, +10°C, +20°C, +30°C TALARM - TWARN (MAX6505/MAX6506) o SOT23-6 Package
MAX6505MAX6508
Ordering Information
PART MAX6505UT_ _ _ _-T* MAX6506UT_ _ _ _-T* MAX6507UT_ _ _ _-T** MAX6508UT_ _ _ _-T** TEMP. RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PINPACKAGE 6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6
________________________Applications
µP Temperature Monitoring in High-Speed Computers Temperature Control Temperature Alarms Fan Control
*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 SOT23-6 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. Selector Guide appears at end of data sheet. Typical Operating Circuits appear at end of data sheet.
Pin Configurations
TOP VIEW
WARN (WARN) 1 6 ALARM (ALARM) OK (OK) 1 6 OVER (OVER)
GND 2
MAX6505 MAX6506
5
S0
GND 2
MAX6507 MAX6508
5
N.C.
S1 3 ( ) ARE FOR MAX6506.
4
VCC
S0 3
4
VCC ( ) ARE FOR MAX6508.
SOT23-6
SOT23-6
________________________________________________________________ Maxim Integrated Products
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For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
Dual Trip SOT Temperature Switches MAX6505MAX6508
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to GND) ..........-0.3V to +6V S1, S0 to GND ...........-0.3V to (VCC + 0.3V) All Other Pins to GND.........-0.3V to (VCC + 0.3V) Input/Output Current, All Pins..........±20mA Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 7.1mW/°C above +70°C)..571mW Operating Temperature Range (TMIN to TMAX) ....-40°C to +125°C Thermal Resistance (JA) ....115°C/W Storage Temperature Range .....-65°C to +150°C Maximum Die Temperature....+150°C 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
(VCC = +2.5V to +5.5V, RPULLUP = 100k (MAX6505/MAX6507 only), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = +5V, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Range SYMBOL VCC S0 = S1 = GND Supply Current ICC S0 = GND Temperature Threshold Accuracy (Note 2) -40°C to 0° C TTH 0°C to +95° C +95°C to +125 ° C S1 = GND, S0 = GND Delta Temperature (TALARM -TWARNING) MAX6505/MAX6506 TAW S1 = GND, S0 = VCC S1 = VCC, S0 = GND S1 = VCC, S0 = VCC ALARM (MAX6505/MAX6506) WARN (MAX6505/MAX6506) THYST OK, OVER (MAX6507/MAX6508) VIH VIL Output Voltage High (MAX6506/MAX6508) ISOURCE = 500µA, VCC > 2.5V VOH ISOURCE = 800µA,VCC > 4.5V Output Voltage Low VOL ISINK = 3.2mA, VCC > 2.5V ISINK = 5mA, VCC > 4.5V 0.8 x VCC VCC -1.5 0.5 0.5 V TAW = 5°C or 10°C TAW = 20°C or 30°C S0 = GND S0 = VCC Logic Input Levels (S1, S0) 0.8 x VCC 0.8 MAX6505/ MAX6506 MAX6507/ MAX6508 -5.5 -3.5 -4 CONDITIONS MIN 2.5 40 30 ±0.5 ±0.5 ±0.5 5 10 20 30 2 5 10 2 10 V °C °C TYP MAX 5.5 80 µA 60 5.5 3.5 4 °C UNITS V
Temperature Threshold Hysteresis (Note 3)
V
2
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Dual Trip SOT Temperature Switches
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.5V to +5.5V, RPULLUP = 100k (MAX6505/MAX6507 only), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = +5V, unless otherwise noted.) (Note 1)
PARAMETER Open-Drain Output Leakage Current SYMBOL CONDITIONS VCC = 5.5V, VALARM = 5.5V, VWARN = 5.5V (MAX6505) VCC = 5.5V, VOK = 5.5V, VOVER = 5.5V (MAX6507) MIN TYP MAX 1 µA 1 UNITS
MAX6505MAX6508
Note 1: Note 2: Note 3:
100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design. TALARM, TUNDER, and TOVER are factory-programmed temperature trip thresholds from -40°C to +125°C in 5°C increments. Temperature threshold hysteresis is defined as the difference from positive-going temperature thresholds minus the negative-going temperature thresholds.
Typical Operating Characteristics
(VCC = +5V, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
VCC = +5V RPULLUP = 100k
MAX6505/8-01
HYSTERESIS vs. TRIP TEMPERATURE
VCC = +5V RPULLUP = 100k
MAX6505/8-02
TRIP-POINT ERROR (%) vs. SUPPLY VOLTAGE
0 TRIP-POINT ERROR (%) -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 NORMALIZED TO TRIP-POINT TEMPERATURE AT VCC = +5V 2.5 3.0 3.5 4.0 4.5 5.0 5.5
MAX6505/8-03
50 45 SUPPLY CURRENT (µA) 40 35 30 25 20
2.5
0.1
2.0 HYSTERESIS (°C)
1.5
1.0
0.5 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C)
-0.8
SUPPLY VOLTAGE (V)
MAX6505 STARTUP AND POWER-DOWN (T < TTH)
MAX6505/8-04
MAX6505 STARTUP DELAY (T > TTH)
MAX6505/8-05
A 2V/div
A 2V/div
B
B
100µs/div A: VCC PULSE B: ALARM VOLTAGE, RPULLUP = 100k
100µs/div A: VCC PULSE B: ALARM VOLTAGE, RPULLUP = 100k
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