The MIC803-26D2VM3 is a precision voltage supervisory circuit manufactured by Micrel (now Microchip Technology). These circuits are designed to monitor the voltage level of a power supply and provide a reset signal to a microcontroller or other digital device when the voltage falls below a specified threshold.

Applications:

• Microcontroller Reset: Ensures proper initialization of microcontrollers after power-up or during brownout conditions.
• Memory Protection: Prevents data corruption in memory devices during voltage fluctuations.
• System Monitoring: Monitors power supply voltage and provides an alert if the voltage falls outside acceptable limits.
• Portable Devices: Protects sensitive components in battery-powered devices from undervoltage conditions.
• Industrial Control Systems: Monitors power supply voltage to ensure reliable operation.

Features:

• Precision Voltage Monitoring: Accurately monitors the power supply voltage.
• Reset Output: Provides a reset signal when the voltage falls below the threshold.
• Fixed Threshold Voltage: Preset voltage threshold for undervoltage detection (e.g., 2.63V).
• Active-Low Reset Output: Reset output is low when the voltage is below the threshold.
• Small Package: Typically available in a small SOT-23 or similar package.

Benefits:

• Reliable System Operation: Ensures proper initialization and prevents system malfunctions due to undervoltage conditions.
• Data Protection: Prevents data corruption in memory devices.
• Simplified Design: Requires minimal external components.
• Low Power Consumption: Minimizes power drain in battery-powered applications.
• Compact Size: Allows for easy integration into space-constrained designs.

Additional Details:

The MIC803-26D2VM3 has a fixed threshold voltage of 2.63V. The reset output remains low until the voltage rises above the threshold and remains there for a certain reset timeout period. The reset timeout period is an important parameter to consider for proper system operation. Detailed specifications, including threshold voltage accuracy, reset timeout period, and operating temperature range, can be found in the Microchip (formerly Micrel) datasheet for the MIC803-26D2VM3 voltage supervisory circuit.