The MIC803-30D4VM3TR is a voltage supervisor manufactured by Micrel (now Microchip Technology). This device is designed to monitor the supply voltage of a system and provide a reset signal when the voltage falls below a specified threshold. It is commonly used to prevent erratic behavior in microcontrollers and other digital circuits during power-up, power-down, or brownout conditions.

Applications

• Microcontroller reset circuits
• Voltage monitoring in embedded systems
• Power-on reset (POR) circuits
• Brownout protection
• Battery-powered devices

Features

• Precision voltage monitoring: 3.0V threshold
• Active-low reset output
• Open-drain output
• Manual reset input
• Small package: SOT-23
• Low supply current

Benefits

• Reliable system startup: Ensures proper initialization of microcontrollers and other digital circuits.
• Protection against brownout conditions: Prevents erratic behavior and data corruption during low-voltage conditions.
• Simple to use: Requires minimal external components.
• Compact design: Saves valuable board space.
• Low power consumption: Extends battery life in portable applications.

Technical Specifications

The MIC803-30D4VM3TR monitors a supply voltage of 3.0V with high precision. It features an active-low reset output that is asserted when the supply voltage falls below the threshold. The open-drain output allows for flexible interfacing with different logic levels. The device also includes a manual reset input, allowing the system to be reset externally. It comes in a small SOT-23 package for efficient surface-mount assembly. The supply current is very low, typically in the microampere range, making it suitable for battery-powered applications. The reset timeout period is internally fixed, ensuring a reliable reset signal.

This voltage supervisor is commonly used in a wide range of applications, including consumer electronics, industrial equipment, and automotive systems. It provides a simple and effective way to protect sensitive electronic components from damage due to voltage fluctuations and brownout conditions.