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LM88 Datasheet

Part Number LM88
Manufacturers National Semiconductor
Logo National Semiconductor
Description Factory Programmable Dual Remote-Diode Thermostat
Datasheet LM88 DatasheetLM88 Datasheet (PDF)

LM88 Factory Programmable Dual Remote-Diode Thermostat August 2001 LM88 Factory Programmable Dual Remote-Diode Thermostat General Description The LM88 is a dual remote-diode temperature sensor with 3 digital comparators. The LM88 has 3 open-drain outputs (O_SP0, O_SP1 and O_CRIT) that can be used as interrupts or to signal system shutdown. The digital comparators can be factory programmed to make a greater than or less than comparison. When programmed for a greater than comparison outputs: O_S.

  LM88   LM88






Part Number LM88
Manufacturers ETCTI
Logo ETCTI
Description LM88 Factory Programmable Dual Remote-Diode Thermostat (Rev. C)
Datasheet LM88 DatasheetLM88 Datasheet (PDF)

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  LM88   LM88







Factory Programmable Dual Remote-Diode Thermostat

LM88 Factory Programmable Dual Remote-Diode Thermostat August 2001 LM88 Factory Programmable Dual Remote-Diode Thermostat General Description The LM88 is a dual remote-diode temperature sensor with 3 digital comparators. The LM88 has 3 open-drain outputs (O_SP0, O_SP1 and O_CRIT) that can be used as interrupts or to signal system shutdown. The digital comparators can be factory programmed to make a greater than or less than comparison. When programmed for a greater than comparison outputs: O_SP0 and O_SP1 activate when the temperatures measured by D0 or D1 exceed the associated setpoints of T_SP0 or T_SP1. O_CRIT activates when the temperature measured by either D0 or D1 exceeds setpoint T_CRIT. T_CRIT can be set at 1˚C intervals from −40˚C to +125˚C. T_SP0 and T_SP1 can be set at 4˚C intervals in the range of T_CRIT +127˚C/−128˚C. Hysteresis for all comparators is set to 1˚C. O_CRIT, in conjunction with T_CRIT, could be used to prevent catastrophic damage to key subsystems such as notebook Card Bus cards while O_SP0 and O_SP1, in conjunction with T_SP0 and T_SP1, can warn of an impending failure. The LM88 is available in an 8-lead mini-small-outline package. Features n 2 external remote diode input channels n 3 digital comparator outputs, 1 per remote diode and one T_CRIT common to both n Factory programmable greater than or less than comparisons n 1˚C comparator hysteresis n 2 setpoints, T_SP0 and T_SP1, factory programmable in 4˚C intervals n 1 setpoint, T_CRIT, factory.


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