The R3112Q321A 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 to microcontrollers or other system components when the voltage drops below a specified threshold. This is crucial for preventing erratic behavior and ensuring the reliable operation of electronic devices.

Applications

• Microcontroller Reset Circuits
• Power Supply Monitoring
• Battery-Powered Devices
• Voltage Supervision in Embedded Systems
• Portable Electronics

Features

• High-Accuracy Detection Voltage: Provides precise voltage monitoring, ensuring accurate reset generation.
• Low Supply Current: Minimizes power consumption, making it suitable for battery-powered applications.
• Small Package: Allows for compact circuit designs, ideal for space-constrained applications.
• Built-in Hysteresis: Prevents output oscillation due to voltage fluctuations near the threshold.
• Open Drain Output: Offers flexible interfacing with other circuits.

Benefits

• Improved System Reliability: Prevents malfunctions and data corruption caused by voltage drops.
• Extended Battery Life: Reduces power consumption in battery-operated devices.
• Simplified Circuit Design: Integrates essential voltage monitoring functions into a single component.
• Enhanced Noise Immunity: Ensures stable operation in noisy environments.
• Flexible Integration: Compatible with a wide range of microcontrollers and logic circuits.

Additional Details

The R3112Q321A features a detection voltage of 3.2V. It is commonly used to reset a microcontroller when the supply voltage falls below this level, thereby preventing unpredictable operation. The low quiescent current is a key advantage in battery-powered applications, where minimizing power drain is essential. The built-in hysteresis prevents unwanted resets due to minor voltage variations or noise. 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. It is a crucial component for ensuring stable and reliable operation of electronic systems by preventing malfunctions caused by voltage sags or drops.