The R3112Q291A-TR-F is a voltage detector IC manufactured by Ricoh Electronic Devices Co., Ltd. It is designed to monitor the supply voltage and generate a reset signal when the voltage drops below a certain threshold. This functionality is critical for ensuring stable operation of microcontrollers and other sensitive electronic components. The 'TR' suffix indicates Tape and Reel packaging, while '-F' typically denotes a specific manufacturing or quality control process or a lead-free finish.

Applications

• Microcontroller Reset Circuits
• Power Supply Monitoring
• Battery Management Systems
• Voltage Supervision in Embedded Systems
• Portable Electronic Devices

Features

• High-Accuracy Detection Voltage: Provides precise voltage monitoring to ensure reliable reset generation.
• Low Supply Current: Minimizes power consumption, making it suitable for battery-powered applications.
• Built-in Hysteresis: Prevents output oscillation due to minor voltage fluctuations.
• Open-Drain Output: Allows for flexible connection to various logic levels.
• Small Package: Suitable for space-constrained applications.

Benefits

• Improved System Reliability: Prevents erratic behavior and data corruption caused by undervoltage conditions.
• Extended Battery Life: Reduces power consumption in portable devices.
• Simplified Circuit Design: Requires minimal external components.
• Enhanced Noise Immunity: Provides stable operation in noisy environments.
• Flexible Integration: Compatible with a wide range of microcontrollers and digital circuits.

Additional Details

The R3112Q291A-TR-F features a detection voltage of 2.9V. It is commonly used to reset a microcontroller when the supply voltage falls below this level, preventing unpredictable operation. The low quiescent current is a key advantage in battery-powered applications. The built-in hysteresis prevents chattering or oscillations of the output signal near the detection threshold. The open-drain output requires an external pull-up resistor. The device is usually packaged in a small surface-mount package such as SOT-23. The operating temperature range is typically -40°C to +85°C. The “-F” suffix often denotes compliance with RoHS (Restriction of Hazardous Substances) directives, indicating it is lead-free and environmentally friendly. The tape and reel packaging facilitates automated assembly processes, improving manufacturing efficiency.