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Low-Cost, +2.7V to +5.5V, Micropower Temperature Switches in SOT23

Industry's Simplest Temperature Detectors - Easy to Use, Low Cost, No External Components Required!

Product Details

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.

Key Features

  • ±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

Applications/Uses

  • µP Temperature Monitoring in High-Speed Computers
  • Fan Control
  • Temperature Alarms
  • Temperature Control
Parametric specs for Temperature Switches
Switch Type Local
Interface Logic
Functions Temperature Switch/Temperature Comparator
Accuracy (±°C) 4
Temp. Thresh. (°C) 35
45
55
65
75
85
95
105
115
Package/Pins SOT23/5
Oper. Temp. (°C) -55 to +125
Budgetary
Price (See Notes)
$0.76 @1k
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Simplified Block Diagram

MAX6501, MAX6502, MAX6503, MAX6504: Typical Operating Circuit MAX6501, MAX6502, MAX6503, MAX6504: Typical Operating Circuit Zoom icon

Design & Development

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Additional Resources
Temperature Family by Product Type
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Parameters

Parametric specs for Temperature Switches
Switch Type Local
Interface Logic
Functions Temperature Switch/Temperature Comparator
Accuracy (±°C) 4
Temp. Thresh. (°C) 35
45
55
65
75
85
95
105
115
Package/Pins SOT23/5
Oper. Temp. (°C) -55 to +125
Budgetary
Price (See Notes)
$0.76 @1k

Key Features

  • ±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

Applications/Uses

  • µP Temperature Monitoring in High-Speed Computers
  • Fan Control
  • Temperature Alarms
  • Temperature Control

Description

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.

Simplified Block Diagram

MAX6501, MAX6502, MAX6503, MAX6504: Typical Operating Circuit MAX6501, MAX6502, MAX6503, MAX6504: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal