Dual Trip SOT Temperature Switches

 

Part Number	Replacement	Explanation

Description

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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 (active-low OVER, OK), and the MAX6508 has push-pull outputs (OVER, active-low 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 (active-low 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.

MAX6505, MAX6506, MAX6507, MAX6508: Pin Configuration Enlarge+

Key Features

• ±0.5°C (typ) Threshold Accuracy Over Full Temperature Range
• No External Components Required
• Low Cost
• 30µA (typ) Supply Current
• Factory-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

Applications/Uses

• Fan Control
• Temperature Alarms
• Temperature Control