LM89CIMMX
Product Overview
Category: Integrated Circuit
Use: Temperature Sensor and Fan Controller
Characteristics: High precision, digital output, programmable temperature limits
Package: 8-pin SOIC
Essence: LM89CIMMX is a temperature sensor and fan controller designed for use in various electronic devices. It provides accurate temperature measurements and control over fan speed based on the temperature readings.
Packaging/Quantity: Available in reels of 2500 units.
Specifications
- Operating Voltage: 2.7V to 5.5V
- Temperature Measurement Range: -55°C to +125°C
- Fan Control Range: 0% to 100%
- Resolution: 0.125°C
- Interface: I2C/SMBus
Detailed Pin Configuration
- VDD - Power Supply
- GND - Ground
- SDA - Serial Data
- SCL - Serial Clock
- ALERT - Open-drain Alert Output
- TACH - Fan Tachometer Input
- PWM - Pulse Width Modulation Output
- OS - Overtemperature Shutdown Input
Functional Features
- Digital temperature sensing with high accuracy
- Programmable temperature limits for alert generation
- Automatic fan speed control based on temperature
- Fan tachometer input for monitoring fan speed
- Pulse width modulation output for fan speed control
Advantages and Disadvantages
Advantages: - High precision temperature measurement - Flexible fan speed control - Small form factor - Low power consumption
Disadvantages: - Limited fan control range - Requires external pull-up resistors for I2C communication
Working Principles
The LM89CIMMX utilizes its internal temperature sensor to measure the ambient temperature. It compares the measured temperature with the programmed limits and generates an alert if the temperature exceeds the specified thresholds. Additionally, it controls the fan speed by adjusting the pulse width modulation (PWM) output based on the temperature readings.
Detailed Application Field Plans
The LM89CIMMX is widely used in applications where precise temperature monitoring and fan control are essential. Some common application fields include: - Personal Computers - Servers - Consumer Electronics - Industrial Equipment
Detailed and Complete Alternative Models
- LM96000: Offers extended temperature measurement range and additional fan control features.
- MAX31725: Provides similar temperature sensing and fan control capabilities with enhanced I2C interface features.
In conclusion, the LM89CIMMX is a versatile integrated circuit that offers accurate temperature sensing and fan control capabilities, making it suitable for a wide range of electronic applications.
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What is LM89CIMMX?
- LM89CIMMX is a digital temperature sensor with an integrated fan controller, designed for use in PC and embedded systems.
How does LM89CIMMX measure temperature?
- It uses an on-chip diode to measure the temperature of the device or the external environment.
What is the operating voltage range of LM89CIMMX?
- The operating voltage range is typically 2.7V to 5.5V.
Can LM89CIMMX control multiple fans?
- Yes, it can control up to two fans using its integrated PWM outputs.
What is the resolution of temperature measurement with LM89CIMMX?
- It has a 9-bit (0.5°C) resolution for temperature measurements.
Is LM89CIMMX suitable for low-power applications?
- Yes, it has a low standby current consumption, making it suitable for low-power designs.
Does LM89CIMMX have built-in fault detection features?
- Yes, it includes open/shorted fan detection and shutdown capabilities.
Can LM89CIMMX communicate with a microcontroller?
- Yes, it has an I2C interface for communication with a microcontroller.
What is the typical accuracy of LM89CIMMX?
- The typical accuracy is within ±2°C.
Is LM89CIMMX suitable for industrial applications?
- While primarily designed for PC and embedded systems, it can also be used in certain industrial applications where its features are beneficial.