LM88

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.