The R3111N401A is a voltage detector IC manufactured by Ricoh. Its primary function is to monitor the input voltage of a system and generate a reset signal when the voltage falls below a predefined threshold. This functionality is crucial for preventing malfunctions and data corruption caused by insufficient voltage, ensuring the reliable operation of electronic devices.

Applications

• Microcontroller reset circuits
• Power management systems
• Battery voltage monitoring
• CPU voltage supervision
• Real-time clock (RTC) backup
• Overvoltage protection

Features

• High-accuracy voltage detection: Precise monitoring of supply voltage.
• Low current consumption: Minimizes power drain, crucial for battery-operated devices.
• Hysteresis: Prevents output oscillation due to noise.
• Compact package: Facilitates space-saving designs.
• Open drain output: Flexible interfacing with various logic levels.
• Wide operating temperature range: Operates reliably in diverse environments.

Benefits

• Protects against system failures: Prevents malfunctions and data loss due to undervoltage.
• Extends battery life: Low power consumption maximizes runtime.
• Ensures reliable operation: Stable reset signal prevents erratic behavior.
• Simplifies circuit design: Easy integration with existing systems.
• Reduces component count: Integrated functionality minimizes external components.

Technical Specifications

The R3111N401A features a specific detection voltage (typically around 4.0V; verify with the datasheet). It operates with a low supply current, usually in the microampere range. Hysteresis prevents unwanted triggering due to voltage fluctuations. The output is an N-channel open drain. The operating temperature range is typically from -40°C to +85°C. Please refer to the official Ricoh datasheet for detailed electrical characteristics, package information, and application notes.