LM809M3X-3.08/NOPB

Product Overview

Category

The LM809M3X-3.08/NOPB belongs to the category of voltage supervisors or reset ICs.

Use

This product is primarily used in electronic systems to monitor and control the power supply voltage, ensuring proper operation and preventing damage due to voltage fluctuations.

Characteristics

• Voltage monitoring: The LM809M3X-3.08/NOPB can accurately monitor the power supply voltage and provide a reset signal when it falls below a specified threshold.
• Low power consumption: This device operates with low quiescent current, making it suitable for battery-powered applications.
• Wide operating voltage range: It can operate within a wide range of input voltages, typically from 1.6V to 5.5V.
• Precision voltage reference: The integrated voltage reference ensures accurate voltage monitoring.
• Small package size: The LM809M3X-3.08/NOPB is available in a compact SOT-23 package, which is ideal for space-constrained designs.
• RoHS compliant: This product meets the Restriction of Hazardous Substances directive, making it environmentally friendly.

Package and Quantity

The LM809M3X-3.08/NOPB is packaged in a SOT-23-3 package. It is typically sold in reels containing 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage: 3.08V (±2%)
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Power-On Reset Delay: 200ms (typical)

Pin Configuration

The LM809M3X-3.08/NOPB has three pins in the SOT-23 package:

1. VDD: Power supply input pin.
2. GND: Ground reference pin.
3. RESET: Output pin that provides a reset signal when the monitored voltage falls below the threshold.

Functional Features

• Voltage Monitoring: The LM809M3X-3.08/NOPB continuously monitors the power supply voltage and asserts the RESET pin low when it drops below the specified threshold.
• Reset Signal Generation: When the voltage rises above the threshold, the RESET pin is released high, indicating that the system can resume normal operation.
• Precision Voltage Reference: The integrated voltage reference ensures accurate monitoring of the power supply voltage.
• Power-On Reset Delay: The device includes a built-in delay to allow the power supply voltage to stabilize before generating the reset signal.

Advantages and Disadvantages

Advantages

• Accurate voltage monitoring for reliable system operation.
• Low power consumption, suitable for battery-powered applications.
• Wide operating voltage range for versatility.
• Compact package size for space-constrained designs.
• RoHS compliant, environmentally friendly.

Disadvantages

• Limited to voltage monitoring and reset functionality, not suitable for more complex power management tasks.
• Requires an external pull-up resistor for proper operation.

Working Principles

The LM809M3X-3.08/NOPB works by comparing the power supply voltage with a precise internal reference voltage. When the voltage drops below the threshold, the device asserts the RESET pin low, indicating a power-on reset condition. Once the voltage rises above the threshold, the RESET pin is released high, signaling that the system can resume normal operation.

Detailed Application Field Plans

The LM809M3X-3.08/NOPB finds application in various electronic systems where voltage monitoring and reset functionality are critical. Some common application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper operation and preventing data corruption during power supply fluctuations.
2. Communication Systems: Maintaining stable voltage levels to prevent signal loss or disruption.
3. Industrial Control Systems: Protecting sensitive equipment from damage due to voltage variations.
4. Automotive Electronics: Monitoring the vehicle's electrical system to prevent malfunctions.

Detailed and Complete Alternative Models

1. MAX809: A similar voltage supervisor IC with adjustable reset threshold voltage.
2. ADM708: Voltage monitor with a watchdog timer for additional system monitoring capabilities.
3. TPS3808: Supervisor IC with programmable delay time and manual reset input.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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