DESCRIPTION

· The LM99 is an 11-bit remote diode temperature sensor with a 2-wire SMBus serial interface.

· It accurately measures its own temperature and the temperature of a remote diode-connected transistor.

· The remote diode temperature sensor shifts the temperature from the remote sensor down by 16°C and operates on that shifted temperature.

· It includes an Offset Register for precise matching to various thermal diodes.

· The LM99 and LM99-1 have the same functions but different SMBus slave addresses, allowing both to be on the same bus simultaneously.

FEATURES

· Accurately senses the temperature of remote diodes.

· On-board local temperature sensing.

· 10-bit plus sign remote diode temperature data format with 0.125°C resolution.

· T_CRIT_A output useful for system shutdown.

· ALERT output supports SMBus 2.0 protocol.

· SMBus 2.0 compatible interface, supports timeout.

· 8-pin VSSOP package.

APPLICATIONS

· Graphics processor thermal management.

· Computer processor thermal management.

· Electronic test equipment.

· Office electronics.