The MIC803-41D4VC3TR is a precision voltage supervisory circuit manufactured by Micrel (now Microchip Technology). It is designed to monitor the supply voltage of microprocessors (µPs), microcontrollers (µCs), and digital systems. When the supply voltage drops below a predetermined threshold, the MIC803 asserts a reset signal, preventing erroneous operation and potential data corruption. It features a precise threshold, low power consumption, and a compact package.

Applications

• Microprocessor Reset: Ensures proper reset of microprocessors during power-up, power-down, and brownout conditions.
• Microcontroller Supervision: Monitors the supply voltage of microcontrollers to prevent malfunction due to low voltage.
• Memory Protection: Protects memory devices from corruption during voltage drops.
• Portable Devices: Suitable for battery-powered devices to prevent operation at low battery levels.
• Industrial Control Systems: Ensures reliable operation of control systems in harsh environments.

Features

• Precise Voltage Threshold: Accurate threshold voltage ensures reliable detection of undervoltage conditions.
• Low Power Consumption: Minimizes power dissipation, making it suitable for battery-powered applications.
• Open-Drain Output: Provides a flexible interface for various logic levels.
• Internal Hysteresis: Prevents oscillation during voltage transitions.
• Small Package Size: Compact package allows for use in space-constrained applications.
• RoHS Compliant: Meets environmental regulations, ensuring it is free from hazardous substances.

Benefits

• Improved System Reliability: Prevents erroneous operation and data corruption during undervoltage conditions.
• Extended Battery Life: Low power consumption extends battery life in portable devices.
• Simplified Circuit Design: Requires minimal external components for operation.
• Enhanced Protection: Protects microprocessors and memory devices from damage due to low voltage.
• Versatile Application: Suitable for a wide range of applications due to its flexible design and stable performance.

Additional Details

The MIC803-41D4VC3TR has a typical threshold voltage of 4.1V. The output is an open-drain output, allowing it to be used with various logic levels. The internal hysteresis is typically around 100mV, preventing oscillation during voltage transitions. It is available in a small surface-mount package, such as SOT-23. The operating temperature range is typically -40°C to +85°C. The device requires a minimum supply voltage for proper operation, and it provides a reset signal when the supply voltage falls below the threshold. The reset signal remains asserted until the supply voltage rises above the threshold plus the hysteresis voltage. This ensures that the microprocessor or microcontroller is properly reset before normal operation resumes.