LM809M3-2.93

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LM809M3-2.93

+BOM

IC SUPERVISOR 1 CHANNEL SOT23-3

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Specifications

Attribute Value
Part Status Obsolete
Digi Key Programmable Not Verified
Type Simple Reset/Power-On Reset
Number of Voltages Monitored 1
Voltage - Threshold 2.93V
Output Push-Pull, Totem Pole
Reset Active Low
Reset Timeout 140ms Minimum
Operating Temperature -40°C ~ 105°C (TA)
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Supplier Device Package SOT-23-3
Base Product Number LM809

Overview

Description

The LM809M3-2.93 is a voltage supervisory IC, commonly used to monitor the supply voltage in microprocessor-based systems. It ensures that the microprocessor operates under optimal conditions by monitoring the voltage levels and asserting a reset signal when the supply voltage drops below a specified threshold, in this case, 2.93 volts. This reset signal prevents the microprocessor from executing incorrect operations due to insufficient voltage levels.
Key features of the LM809M3-2.93 include:
1. Precision Monitoring: It provides accurate voltage monitoring with a specified threshold of 2.93V.

2. Reset Functionality: The device outputs a reset signal to the microprocessor when the voltage is below the threshold. This reset signal remains active until the voltage stabilizes above the threshold.
3. Low Power Consumption: The device is designed to consume minimal power, making it suitable for battery-powered applications.
4. Compact Design: The device comes in a small SOT-23 package, ideal for space-constrained applications.
Overall, the LM809M3-2.93 enhances system reliability by preventing undesired operations during brown-out conditions.

Equivalent

The LM809M3-2.93 is a microprocessor supervisory circuit. Equivalent products include:
1. MAX809 series from Maxim Integrated.
2. MCP120 from Microchip Technology.
3. ADM809 from Analog Devices.
4. TPS3809 from Texas Instruments.
These alternatives offer similar functionality, such as voltage monitoring and reset capabilities. Always verify the exact specifications and pinouts to ensure compatibility.

Features

The LM809M3-2.93 is a microprocessor supervisory circuit designed to monitor the supply voltage in digital systems and provide a reset to the processor during power-up, power-down, and brownout conditions. Here are some key features:
1. Voltage Monitoring: It monitors the supply voltage and asserts a reset signal when the voltage drops below the specified threshold of 2.93V.
2. Reset Output: Provides an active-low reset output to ensure proper microprocessor operation, which remains asserted for a minimum reset timeout period to allow the system to stabilize.
3. Precision Threshold: Offers a precise voltage threshold to ensure accurate system monitoring.
4. Low Supply Current: Consumes minimal current, making it suitable for battery-powered applications.
5. Push-Pull Output: Features a push-pull output stage for compatibility with a wide range of microcontrollers.
6. Wide Temperature Range: Operates effectively across a broad temperature range, suitable for various environmental conditions.
7. Surface-Mount Package: Available in a compact SOT-23 surface-mount package, enabling space-saving designs.
These features make the LM809M3-2.93 ideal for ensuring system reliability in embedded applications.

Pinout

The LM809M3-2.93 is a voltage supervisor integrated circuit typically used for monitoring the power supply voltage levels in electronic systems. It comes in a SOT-23 package with a 3-pin configuration.
Here are the pin functions:
1. GND (Ground): This pin is connected to the ground of the system.
2. VCC (Voltage Input): This pin is connected to the power supply that is being monitored. The device monitors the voltage at this pin.
3. RESET (Output): This pin outputs a reset signal. It goes low when the VCC drops below the specified threshold voltage of 2.93V and stays low for a specified delay time after VCC returns above the threshold, ensuring that the system restarts correctly.
The LM809 series is designed to protect microprocessors by generating a reset signal whenever the monitored voltage falls below a preset value, preventing the CPU from executing erroneous instructions during low voltage conditions.

Manufacturer

The LM809M3-2.93 is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components and integrated circuits. It is well-known for its innovations in analog and embedded processing, offering products that are used in various electronic systems and devices across industries.

Application

The LM809M3-2.93 is a voltage supervisor designed to monitor the power supply in microprocessor-based systems. It is commonly used in applications requiring reliable system resets under low voltage conditions. Key application areas include:
1. Computing Systems: Ensures proper operation and reset of CPUs and microcontrollers, preventing data corruption.
2. Embedded Systems: Provides power monitoring for embedded devices to maintain stability.
3. Consumer Electronics: Used in gadgets for safe startup and shutdown sequences.
4. Industrial Automation: Monitors power supplies in PLCs and other control devices.
5. Automotive Electronics: Ensures stable operation of electronic control units by supervising battery voltage levels.

Package

The LM809M3-2.93 is typically available in a SOT-23 package. This package type is a small, surface-mount format commonly used for electronic components, providing a compact design suitable for space-constrained applications.

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