The R3111N402C-TR is a voltage detector IC manufactured by Ricoh. It is designed for use in a variety of electronic applications requiring accurate voltage monitoring and reset functionality. This IC is part of Ricoh's R3111 series, which is known for its low supply current and high-precision detection voltage.

Applications

• Microprocessor reset circuitry: Ensuring proper reset of microprocessors during power-up or voltage drops.
• Voltage monitoring in battery-powered devices: Monitoring battery voltage to prevent deep discharge.
• Power management systems: Providing undervoltage lockout (UVLO) functionality.
• Industrial control systems: Monitoring power supply voltages to ensure stable operation.
• Consumer electronics: Used in devices such as smartphones, tablets, and portable media players for power management.

Features

• High-precision detection voltage: Ensures accurate voltage monitoring.
• Low supply current: Minimizes power consumption, extending battery life in portable devices.
• Built-in hysteresis: Prevents chattering and false resets due to voltage fluctuations.
• Small package size: Allows for compact circuit designs.
• Open drain output: Provides flexibility in interfacing with other circuits.

Benefits

• Improved system reliability: Prevents malfunction by resetting the system during undervoltage conditions.
• Extended battery life: Low current consumption contributes to longer operating times for battery-powered devices.
• Simplified circuit design: Integrated features reduce the need for external components.
• Reduced board space: Small package size enables compact designs.
• Enhanced system stability: Hysteresis ensures stable operation even with noisy power supplies.

Additional Details

The R3111N402C-TR has a detection voltage of 4.0V. It operates over a wide temperature range, typically -40°C to +85°C, making it suitable for various environments. The output is an N-channel open drain, which requires a pull-up resistor. It is supplied in a small SOT-23-5 package. The typical supply current is very low, usually in the microampere range. The hysteresis voltage helps prevent oscillations and ensures reliable reset operation. Proper use of this component requires careful selection of external pull-up resistors and consideration of the application's specific voltage requirements.