The SGM810-XXN3L/TR is a microprocessor reset circuit (also known as a voltage supervisor) manufactured by SG Micro Corp. This device is designed to monitor the supply voltage of microprocessors, microcontrollers, and other digital systems. Its primary function is to assert a reset signal when the supply voltage falls below a pre-defined threshold. This ensures that the microprocessor starts in a known state and prevents it from operating erratically or corrupting data during power-up, power-down, or brown-out conditions.

Applications

• Microprocessor/Microcontroller Reset: Provides a reliable reset signal during power-up, power-down, and brown-out conditions.
• Power-On Reset (POR): Generates a reset signal upon initial power application to ensure proper system initialization.
• Brown-Out Protection: Prevents system malfunction and data corruption due to low voltage conditions.
• Voltage Monitoring: Continuously monitors the power supply voltage and asserts a reset if it falls below the threshold.
• Embedded Systems: Used in various embedded systems to provide reliable voltage monitoring and reset functionality.

Features

• Precision Voltage Monitoring: Accurately monitors the supply voltage and compares it to a pre-defined threshold.
• Reset Output: Asserts a reset signal when the supply voltage falls below the threshold, typically an active-low signal.
• Fixed Threshold Voltage: A pre-defined threshold voltage level that triggers the reset output.
• Low Quiescent Current: Draws minimal current during normal operation, making it suitable for battery-powered applications.
• Small Package: Available in a compact XN3L package, saving valuable board space.
• Active-Low Reset Output: The reset signal is active low.

Benefits

• Improved System Reliability: Prevents erratic operation and data corruption due to low voltage conditions.
• Simplified Design: Integrates voltage monitoring and reset generation into a single device.
• Reduced Power Consumption: Low quiescent current extends battery life in portable applications.
• Space Saving: Small package allows for high-density circuit layouts.
• Automatic Reset: Automatically resets the system during power-up and brown-out conditions.

Additional Details

The SGM810-XXN3L/TR integrates a precise voltage reference, a comparator, and a reset output driver. When the monitored voltage is above the threshold, the reset output remains de-asserted (high). When the voltage falls below the threshold, the reset output is asserted (low). The reset output remains asserted for a certain period after the voltage rises above the threshold (reset timeout period), ensuring that the microprocessor has sufficient time to initialize correctly. The device is typically supplied in tape and reel packaging for automated assembly. Consult the datasheet for detailed electrical characteristics, timing diagrams, and application notes. It is important to use proper decoupling capacitors to ensure stable operation. The datasheet contains information on the specific threshold voltage and reset timeout period for the SGM810-XXN3L/TR.