LM75

Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface

Industry-Standard Multi-Sourced Digital Temperature Sensor


Please check latest availability status for a specific part variant.

Description

The LM75 temperature sensor includes a delta-sigma analog-to-digital converter, and a digital overtemperature detector. The host can query the LM75 through its I²C interface to read temperature at any time. The open-drain overtemperature output (OS) sinks current when the programmable temperature limit is exceeded. The OS output operates in either of two modes, comparator or interrupt. The host controls the temperature at which the alarm is asserted (TOS) and the hysteresis temperature below which the alarm condition is not valid (THYST). Also, the LM75's TOS and THYST registers can be read by the host. The address of the LM75 is set with three pins to allow multiple devices to work on the same bus. Power-up is in comparator mode, with defaults of TOS = +80°C and THYST = +75°C. The 3.0V to 5.5V supply voltage range, low supply current, and I²C interface make the LM75 ideal for many applications in thermal management and protection.
LM75: Pin Configuration LM75: Pin Configuration Enlarge+

Key Features

  • SO (SOP) and µMAX® (µSOP) Packages
  • I²C Bus Interface
  • Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Input
  • Register Readback Capability
  • Power-Up Defaults Permit Stand-Alone Operation as a Thermostat
  • 3.0V to 5.5V Supply Voltage
  • Low Operating Supply Current 250µA (typ), 1mA (max)
  • 4µA (typ) Shutdown Mode Minimizes Power Consumption
  • Up to Eight LM75s Can Be Connected to a Single Bus
  • Pin- and/or Register-Compatible with Improved-Performance Maxim Sensors Including MAX7500, MAX6625, MAX6626, DS75LV, and DS7505

Applications/Uses

  • Computers and Office Electronics
  • Test Equipment
  • Thermal Protection
  • Thermal System Management

Technical Documents

Tutorial 4679 Thermal Management Handbook

Quality and Environmental Data

Product Reliability Reports: LM75.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • LM75BIM-3+
  • LM75BIM-5+
  • LM75BIMM-3+
  • LM75BIMM-3+T
  • LM75BIMM-5+
  • LM75BIMMX-3+
  • LM75BIMX-3+
  • LM75BIMX-5+
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
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    Tutorial 4679 Thermal Management Handbook

    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

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