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Resistor-programmable Temperature Switch


The switching threshold of the MAX6509 temperature switch from Maxim can be programmed over a range of –40 °C to +125 °C using an external resistor. The IC needs only two external components. A hysteresis value of 2 °C (typical) or 10 °C (typical) can be selected by connecting the HYST pin to ground or Vcc, respectively.
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