LM81BIMT-3/NOPB

Product Overview

Category

The LM81BIMT-3/NOPB belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for temperature monitoring and fan control in electronic devices.

Characteristics

• Temperature monitoring: The LM81BIMT-3/NOPB can accurately measure the temperature of its surroundings.
• Fan control: It provides the capability to control the speed of cooling fans based on the measured temperature.
• High precision: The IC offers high accuracy in temperature measurement, ensuring reliable monitoring.
• Low power consumption: It operates efficiently with low power requirements.
• Small form factor: The LM81BIMT-3/NOPB comes in a compact package, making it suitable for space-constrained applications.

Package

The LM81BIMT-3/NOPB is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of the LM81BIMT-3/NOPB lies in its ability to monitor temperature and control fans, enabling efficient thermal management in electronic devices.

Packaging/Quantity

The LM81BIMT-3/NOPB is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply voltage range: 2.7V to 5.5V
• Temperature measurement range: -55°C to +125°C
• Temperature resolution: 0.125°C
• Fan control output: PWM or linear voltage
• Communication interface: I2C/SMBus compatible
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The LM81BIMT-3/NOPB has a total of 16 pins. Here is the detailed pin configuration:

1. VDD: Power supply voltage
2. GND: Ground reference
3. SDA: Serial data input/output for I2C communication
4. SCL: Serial clock input for I2C communication
5. ALERT#: Open-drain output for alert indication
6. TACH1: Tachometer input for fan speed measurement
7. TACH2: Tachometer input for fan speed measurement
8. TACH3: Tachometer input for fan speed measurement
9. TACH4: Tachometer input for fan speed measurement
10. PWM1: Pulse-width modulation (PWM) output for fan control
11. PWM2: Pulse-width modulation (PWM) output for fan control
12. PWM3: Pulse-width modulation (PWM) output for fan control
13. PWM4: Pulse-width modulation (PWM) output for fan control
14. VCC: Power supply voltage for fan control outputs
15. VREF: Reference voltage output for temperature measurement
16. NC: No connection

Functional Features

The LM81BIMT-3/NOPB offers the following functional features:

1. Temperature monitoring: Accurate measurement of ambient temperature.
2. Fan control: Ability to adjust fan speed based on temperature readings.
3. Alert indication: Provides an alert signal when temperature exceeds a predefined threshold.
4. Tachometer inputs: Allows measurement of fan speed using tachometer signals.
5. PWM outputs: Generates pulse-width modulation signals for controlling fan speed.

Advantages and Disadvantages

Advantages

• High precision temperature monitoring
• Efficient fan control for optimal cooling
• Compact form factor for space-constrained applications
• Low power consumption

Disadvantages

• Limited temperature measurement range (-55°C to +125°C)
• Requires external components for fan control implementation

Working Principles

The LM81BIMT-3/NOPB operates by measuring the voltage across a temperature sensor and converting it into a digital value. This digital value is then used to calculate the corresponding temperature. Based on the measured temperature, the IC adjusts the fan speed using pulse-width modulation or linear voltage control.

Detailed Application Field Plans

The LM81BIMT-3/NOPB finds applications in various electronic devices that require temperature monitoring and fan control. Some of the potential application fields include:

1. Personal computers: Ensuring efficient cooling and preventing overheating.
2. Servers and data centers: Maintaining optimal operating temperatures for reliable performance.
3. Consumer electronics: Regulating temperature in gaming consoles, set-top boxes, and audio/video equipment.
4. Industrial equipment: Monitoring and controlling temperature in machinery and automation systems.
5. Automotive electronics: Managing thermal conditions in vehicle components.

Detailed and Complete Alternative Models

1. LM75A: Digital temperature sensor with I2C interface.
2. MAX31725: Temperature sensor and fan controller with PWM outputs.
3. TMP102: High-accuracy digital temperature sensor with I2C interface.
4. ADT7410: Digital