The LM810M3-4.38 is a 4.38V micropower undervoltage detector manufactured by National Semiconductor, now part of Texas Instruments (TI). This device is designed to monitor a voltage level and provide an output signal when the voltage drops below a certain threshold. It is commonly used in battery-powered applications, microprocessor systems, and other voltage-sensitive circuits. The LM810M3-4.38 features low power consumption and a small SOT-23 package.

Applications:

• Battery-Powered Devices
• Microprocessor Systems
• Power Supply Monitoring
• Overvoltage/Undervoltage Protection
• Critical Circuitry Monitoring

Features:

• Threshold Voltage: 4.38V
• Low Quiescent Current: Typically 15µA
• Open-Drain Output
• Hysteresis: Provided internally
• Operating Temperature Range: -40°C to +85°C
• Small SOT-23 Package

Benefits:

• Voltage Monitoring: Accurately detects undervoltage conditions.
• Low Power Consumption: Extends battery life in portable applications.
• Compact Size: SOT-23 package allows for space-saving designs.
• Reliable Operation: Provides a reliable indication of voltage levels.
• Simplified Design: Requires minimal external components.

Additional Details:

The LM810M3-4.38 features an open-drain output, which allows it to be used with a pull-up resistor to interface with a variety of logic levels. The internal hysteresis helps to prevent oscillations near the threshold voltage. The device operates over a wide temperature range, making it suitable for use in harsh environments. It is available in a small SOT-23 package, making it ideal for space-constrained applications. The datasheet provides detailed information on the device's operating characteristics, including the threshold voltage accuracy, quiescent current, and output characteristics. The LM810M3-4.38 is a reliable and cost-effective solution for undervoltage detection in a variety of applications. Use appropriate pull up resistors according to the supply voltage used on the system.