The R3111N311A-TR-F is a voltage detector IC manufactured by Ricoh Electronic Devices Co., Ltd. This IC is designed to monitor the voltage level of a power supply and generate a reset signal when the voltage drops below a specified threshold. This functionality is vital for preventing malfunctions and data corruption in electronic systems, especially those powered by batteries or subject to voltage fluctuations.

Applications

• Microcontroller (MCU) reset circuits
• Battery-powered devices (e.g., smartphones, tablets, wearables)
• Power management systems
• System voltage monitoring
• Real-time clock (RTC) backup
• Industrial control systems

Features

• High-accuracy voltage detection: Ensures precise monitoring of the supply voltage.
• Low supply current: Minimizes power consumption, extending battery life in portable applications.
• Built-in hysteresis: Prevents oscillation of the reset signal caused by noise or voltage fluctuations.
• Small SOT-23 package: Allows for compact and efficient PCB designs.
• Open drain output: Provides flexibility in interfacing with various logic circuits and voltage levels.
• Wide operating temperature range: Enables reliable operation in diverse environmental conditions.

Benefits

• Enhances system reliability: Prevents data corruption and system crashes due to undervoltage conditions.
• Extends battery life: Low power consumption allows for longer operating times in battery-powered devices.
• Simplifies circuit design: The small package and integrated features reduce the need for external components.
• Improves system stability: The hysteresis feature prevents false triggering and ensures a clean reset signal.
• Cost-effective solution: Provides a reliable voltage detection function at a competitive price.

Technical Specifications

The R3111N311A-TR-F features a specific detection voltage, typically around 3.1V (consult the datasheet for exact value). The "-TR" suffix indicates that it is supplied in tape and reel packaging for automated assembly. The "-F" signifies that it is a lead-free product, compliant with RoHS standards. The output is an N-channel open drain configuration. It operates over a broad temperature range, typically from -40°C to +85°C. Detailed electrical characteristics, package dimensions, and application notes can be found in the official Ricoh datasheet for this IC.