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LM64

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1 remote and local temp sensor with fan control and 5 GPIO's

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Data sheet

LM64

ACTIVE
Data sheet Order now

Product details

Operating temperature range (°C) 0 to 125 Supply voltage (min) (V) 3 Interface type SMBus Supply voltage (max) (V) 3.6 Rating Catalog
Operating temperature range (°C) 0 to 125 Supply voltage (min) (V) 3 Interface type SMBus Supply voltage (max) (V) 3.6 Rating Catalog
WQFN (NHW) 24 20 mm² 5 x 4
  • Accurately Senses Remote and Local Diode Temperatures
  • Integrated PWM Fan Speed Control Output
  • Programmable 8-step Lookup Table for Quieting Fans
  • ALERT and T_Crit Open-drain Outputs
  • Tachometer Input for Measuring Fan RPM
  • 10 bit Plus Sign Remote Diode Temperature Data Format, with 0.125°C Resolution
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • 5 General Purpose Input/Output pins
  • 5 General Purpose Default input pins
  • 24-pin WQFN Package

Key Specifications

  • Remote Diode Temperature Accuracy (includes quantization error)
    • Ambient Temp30°C to 50°C0°C to 85°C
    • Diode Temp120°C to 140°C 25°C to 140°C
    • Max Error±1.0°C (max)±3.0°C (max)
  • Local Temp Accuracy (includes quantization error)
    • Ambient Temp 25°C to 125°C
    • Max Error ±3.0°C (max)
  • Power Supply Requirements
    • Supply DC Voltage 3.0 V to 3.6 V
    • Supply DC Current 1.1 mA (typ)

All trademarks are the property of their respective owners.

  • Accurately Senses Remote and Local Diode Temperatures
  • Integrated PWM Fan Speed Control Output
  • Programmable 8-step Lookup Table for Quieting Fans
  • ALERT and T_Crit Open-drain Outputs
  • Tachometer Input for Measuring Fan RPM
  • 10 bit Plus Sign Remote Diode Temperature Data Format, with 0.125°C Resolution
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • 5 General Purpose Input/Output pins
  • 5 General Purpose Default input pins
  • 24-pin WQFN Package

Key Specifications

  • Remote Diode Temperature Accuracy (includes quantization error)
    • Ambient Temp30°C to 50°C0°C to 85°C
    • Diode Temp120°C to 140°C 25°C to 140°C
    • Max Error±1.0°C (max)±3.0°C (max)
  • Local Temp Accuracy (includes quantization error)
    • Ambient Temp 25°C to 125°C
    • Max Error ±3.0°C (max)
  • Power Supply Requirements
    • Supply DC Voltage 3.0 V to 3.6 V
    • Supply DC Current 1.1 mA (typ)

All trademarks are the property of their respective owners.

The LM64 is a remote diode temperature sensor with PWM fan control. The LM64 accurately measures its own temperature and that of a remote diode. The LM64 remote temperature accuracy is factory trimmed for a MMBT3904 diode-connected transistor with a 16°C offset for high temperatures. TACTUAL DIODE JUNCTION = TLM64 + 16°C

The LM64 features a PWM, open-drain, fan control output, 5 GPIO (General Purpose Input/Output) and 5 GPD (General Purpose Default) pins. The 8-step Lookup Table allows for a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise.

The LM64 is a remote diode temperature sensor with PWM fan control. The LM64 accurately measures its own temperature and that of a remote diode. The LM64 remote temperature accuracy is factory trimmed for a MMBT3904 diode-connected transistor with a 16°C offset for high temperatures. TACTUAL DIODE JUNCTION = TLM64 + 16°C

The LM64 features a PWM, open-drain, fan control output, 5 GPIO (General Purpose Input/Output) and 5 GPD (General Purpose Default) pins. The 8-step Lookup Table allows for a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise.
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Technical documentation

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Type Title Date
* Data sheet LM64 +-1C Remote Diode Temp Sensor w/PWM Fan Cntrl & 5 GPIO's datasheet (Rev. A) 22 Mar 2013
EVM User's guide LM63LM64LM96x63EVM User's Guide 15 Oct 2013
User guide ±1°C Remote Diode Temp Sensor with PWM Fan Control and 5 GPIO`s User Guide 26 Jan 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM63LM64LM96X63EVM — LM63LM64LM96x63EVM - Evaluation Module for Remote Diode Digital Temperature Sensor with Fan Control

The LM63LM64LM96x63EVM evaluation module (EVM) enables designers to immediately start evaluating the operation and performance of the LM63, LM64, LM96063, and LM96163 remote digital temperature sensor / fan controller family of ICs. All four devices can be evaluated by clicking on the appropriate (...)

User guide: PDF
Not available on TI.com
Driver or library

LM63SW-LINUX — Linux Driver for LM63

The Linux driver supports the LM63 series of Remote Diode Temperature Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • (...)
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Support software

DIGITALTEMPSENSORSEVM-SW — Eval Board Software for Hardware Monitors and Digital Temp Sensors

Evaluation Board Software for Hardware Monitors and Digital Temperature Sensors
Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
LM63 — 1 remote and local temperature sensor with fan control LM64 — 1 remote and local temp sensor with fan control and 5 GPIO's LM71 — ±1.5°C Temperature Sensor with SPI Interface LM71-Q1 — Automotive Grade, ±1.5°C Temperature Sensor with SPI Interface LM73 — ±1°C Temperature Sensor with I2C/SMBus Interface LM86 — ±0.75°C remote and local temperature sensor with SMBus interface LM89 — ±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing LM90 — Remote and Local Temperature Sensor with SMBus Interface LM93 — 2 remote, 1 local temp sensor with hardware monitor and 16 power supply voltage monitors LM95010 — ±2°C Temperature Sensor with SensorPath Interface LM95071 — ±1°C Temperature Sensor with SPI Interface LM95221 — ±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C LM95231 — Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95235 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 65/90n LM95235-Q1 — Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus LM96000 — Hardware monitor with fan control and 6 power supply voltage monitors LM96080 — 1 local temp sensor with fan speed and power supply voltage monitor LM96163 — 1 remote and local temp sensor with beta compensation and fan control LM99 — Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface
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Support software

SENSOREVAL — Eval Board Software For Hardware Monitors And Digital Temperature Sensors

SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.

  • Download SensorEval Software and Manual
  • Windows XP support is offered for (...)
Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
LM63 — 1 remote and local temperature sensor with fan control LM64 — 1 remote and local temp sensor with fan control and 5 GPIO's LM71 — ±1.5°C Temperature Sensor with SPI Interface LM71-Q1 — Automotive Grade, ±1.5°C Temperature Sensor with SPI Interface LM73 — ±1°C Temperature Sensor with I2C/SMBus Interface LM75A — 2C industry standard temperature sensor, I2C/SMBus interface LM86 — ±0.75°C remote and local temperature sensor with SMBus interface LM89 — ±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing LM90 — Remote and Local Temperature Sensor with SMBus Interface LM93 — 2 remote, 1 local temp sensor with hardware monitor and 16 power supply voltage monitors LM95010 — ±2°C Temperature Sensor with SensorPath Interface LM95071 — ±1°C Temperature Sensor with SPI Interface LM95172-Q1 — Automotive Grade, ±1°C Temperature Sensor with 200°C Capability and SPI Interface LM95214 — ±2°C Quad Remote and Local Temperature Sensor with SMBus Interface LM95221 — ±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C LM95231 — Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95233 — ±2°C Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95234 — ±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95235 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 65/90n LM95235-Q1 — Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus LM95241 — ±1.25°C dual remote & local temperature sensor with beta compensation and SMBus, I LM95245 — ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 45nm d LM96000 — Hardware monitor with fan control and 6 power supply voltage monitors LM96080 — 1 local temp sensor with fan speed and power supply voltage monitor LM96163 — 1 remote and local temp sensor with beta compensation and fan control LM99 — Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface
Precision ADCs
ADC128D818 — 12-Bit, 82SPS, 8-Ch Delta-Sigma ADC with Temp Sensor, INT / EXT Voltage Reference & I2C Interface
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Package Pins Download
WQFN (NHW) 24 View options
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