LM80 Datasheet | National Semiconductor

LM80 Serial Interface ACPI-patible Microprocessor System Hardware Monitor June 1999 LM80 Serial Interface ACPI-patible Microprocessor System Hardware Monitor General Description The LM80 provides 7 positive voltage inputs, temperature measurement, fan speed measurement, and hardware monitoring on an I2C™ interface. The LM80 performs WATCHDOG™ parisons of all measured values and an open-drain interrupt output bees active when any values exceed programmed limits. A Chassis Intrusion input is provided to monitor and reset an external circuit designed to latch a chassis intrusion event. The LM80 is especially suited to interface to both linear and digital temperature sensors. The...