LM809M3-2.93/NOPB

Product Overview

Category

LM809M3-2.93/NOPB belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and supervising the voltage levels in electronic systems.

Characteristics

• Voltage Range: 2.93V
• Package Type: SOT-23
• Low Quiescent Current: 1.5µA (typical)
• Accuracy: ±2%
• Power-On Reset Delay: 200ms (typical)
• Active-Low Output
• Operating Temperature Range: -40°C to +85°C

Package and Quantity

The LM809M3-2.93/NOPB is available in a SOT-23 package. It is typically sold in reels or tubes containing a specific quantity, usually specified by the manufacturer or distributor.

Specifications

• Supply Voltage Range: 1.0V to 6.0V
• Threshold Voltage: 2.93V
• Reset Threshold Accuracy: ±2%
• Quiescent Current: 1.5µA (typical)
• Power-On Reset Delay: 200ms (typical)
• Output Type: Active-Low
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM809M3-2.93/NOPB has three pins:

1. VDD: This pin is connected to the power supply voltage.
2. GND: This pin is connected to the ground.
3. RESET: This pin outputs an active-low signal indicating the reset status.

Functional Features

• Voltage Monitoring: The LM809M3-2.93/NOPB continuously monitors the input voltage and provides a reset signal when it falls below the threshold voltage.
• Power-On Reset: It includes a power-on reset delay to ensure stable operation during power-up.
• Low Quiescent Current: The device consumes very low current during normal operation, minimizing power consumption.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows for compatibility with various systems.
• Accurate voltage threshold ensures reliable monitoring.
• Low quiescent current minimizes power consumption.
• Small package size (SOT-23) enables space-saving designs.

Disadvantages

• Limited to a specific voltage threshold (2.93V).
• Active-low output may require additional circuitry for certain applications.

Working Principles

The LM809M3-2.93/NOPB operates by comparing the input voltage with the preset threshold voltage. When the input voltage drops below the threshold, the reset pin is pulled low, indicating a reset condition. The power-on reset delay ensures that the reset signal remains active for a specific duration after power-up, allowing the system to stabilize before normal operation resumes.

Application Field Plans

The LM809M3-2.93/NOPB finds applications in various electronic systems where voltage monitoring and power-on reset functionality are crucial. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper reset and initialization during power-up.
2. Communication Systems: Monitoring voltage levels to prevent data corruption or system malfunction.
3. Industrial Control Systems: Providing reliable reset signals for critical control circuits.
4. Automotive Electronics: Ensuring stable operation of vehicle control units during power fluctuations.

Alternative Models

There are several alternative models available that offer similar voltage supervisory features. Some popular alternatives to LM809M3-2.93/NOPB include:

1. MAX809: Manufactured by Maxim Integrated, it offers a wide range of voltage thresholds and package options.
2. MCP100: Produced by Microchip Technology, it provides adjustable threshold voltage settings.
3. TPS3808: Offered by Texas Instruments, it features a wide operating temperature range and low power consumption.

These alternative models can be considered based on specific application requirements and design constraints.

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