Features and Benefits
- ±0.5°C (typical) Threshold Accuracy Over Full Temperature Range
- No External Components Required
- Low Cost
- 30µA Supply Current
- Factory-Programmed Thresholds from -45°C to +125°C in 10°C Increments
- Open-Drain Output (MAX6501/MAX6503) Push-Pull Output (MAX6502/MAX6504)
- Pin-Selectable 2°C or 10°C Hysteresis
- SOT23-5 Package
The MAX6501–MAX6504 low-cost, fully integrated temperature switches assert a logic signal when their die temperature crosses a factory-programmed threshold. Operating from a +2.7V to +5.5V supply, these devices feature two on-chip, temperature-dependent voltage references and a comparator. They are available with factory-trimmed temperature trip thresholds from -45°C to +125°C in 10°C increments, and are accurate to ±0.5°C (typ) or ±6°C (max). These devices require no external components and typically consume 30µA supply current. Hysteresis is pin-selectable at 2°C or 10°C.
The MAX6501/MAX6503 have an active-low, open-drain output intended to interface with a microprocessor (µP) reset input. The MAX6502/MAX6504 have an active-high, push-pull output intended to directly drive fan-control logic. The MAX6501/MAX6502 are offered with hot-temperature thresholds (+35°C to +125°C), asserting when the temperature is above the threshold. The MAX6503/MAX6504 are offered with cold-temperature thresholds (-45°C to +15°C), asserting when the temperature is below the threshold.
The MAX6501–MAX6504 are offered in eight standard temperature versions; contact the factory for pricing and availability of nonstandard temperature versions. They are available in 5-pin SOT23 package.
- µP Temperature Monitoring in High-Speed Computers
- Fan Control
- Temperature Alarms
- Temperature Control
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
MAX6501 Reliability Data1/12/2023117K
Handy Circuit Gives Systems Flexible Fault Protection3/13/2023
Flexible Fault Protection3/13/2023
Thermal Management Handbook5/4/2010
A Compact 36-72V DC Input, 3.3V/10A Output Power Supply\r\n9/29/2003
How to Design Battery Charger Applications that Require External Microcontrollers and Related System-Level Issues7/22/2002
Fan Speed Control Is Cool!7/22/2002
Simplify Isolated Temperature Sensing With Single Wire Sensors5/24/2002
Thermal Protection in Low-Cost Systems, Part 12/11/2002
Temperature Sensor ICs Simplify Designs1/31/2001
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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