MAX6668 Datasheet (Maxim Integrated Products)

MAX6668, Remote Temperature Switches

The MAX6668/MAX6670 remote-junction thermal switches with an internal power transistor drive a cooling fan rated for supply voltages up to +12V and 250mA.

These devices measure the temperature of an external P-N junction (typically a diode-connected transistor) and turn on the fan power switch when

MAX6668 Features

* an open-drain WARN output that goes active when the remote temperature exceeds the factory-programmed fan activation threshold by +15°C. The MAX6670 features an open-drain OT output that goes active when the remote temperature exceeds the factory-programmed threshold by +30°C. The MAX6668/MAX6670 pr