The R3112N301C-TR-FA is a voltage detector IC manufactured by Ricoh. It is designed to monitor voltage levels and provide a reset signal or other indication when the voltage falls below a specified threshold. The '301C' designation indicates a specific detection voltage, typically 3.0V with a tighter tolerance or different characteristics compared to other variants. The IC is commonly used in various electronic devices to ensure stable and reliable operation.

Applications

• Microcontroller Reset Circuits: Ensures proper microcontroller reset during power-up or brownout conditions.
• Power Supply Monitoring: Monitors the output voltage of power supplies and provides an alert if the voltage drops below a specified level.
• Battery-Powered Devices: Protects battery-powered devices from deep discharge by detecting low battery voltage and initiating a controlled shutdown.
• Memory Protection: Prevents data corruption in memory devices by detecting voltage drops and initiating write-protect mechanisms.
• Industrial Control Systems: Ensures reliable operation of sensitive electronic components by monitoring voltage levels.

Features

• High-Accuracy Voltage Detection: Provides precise monitoring of voltage levels with minimal error.
• Low Current Consumption: Minimizes power consumption, making it suitable for battery-powered applications.
• Small Package Size: Available in compact packages such as SOT-23, saving board space.
• Built-in Hysteresis: Prevents output oscillation near the detection threshold.
• Open Drain Output: Offers flexible interfacing with other circuits.
• Wide Operating Temperature Range: Operates reliably over a broad range of temperatures, making it suitable for various environments.

Benefits

• Improved System Reliability: Prevents system failures and data corruption due to low voltage conditions.
• Extended Battery Life: Low power consumption helps extend battery life in portable devices.
• Reduced Board Space: Small package size allows for compact designs.
• Simplified Circuit Design: Integrated features such as hysteresis simplify the design process.
• Protection Against Brownouts: Ensures proper system shutdown during brownout conditions, preventing data loss and system damage.

Additional Details

The R3112N301C-TR-FA operates by comparing the input voltage to an internal reference voltage. When the input voltage falls below the detection threshold (typically 3.0V for the '301' designation, but with potentially tighter tolerances for the 'C' variant), the output is asserted, usually by pulling it low in an open-drain configuration. The hysteresis prevents rapid switching around the threshold voltage. The 'TR' suffix indicates tape and reel packaging for automated assembly, and the 'FA' suffix often denotes a specific environmental compliance feature, such as being halogen-free.

Key specifications include a detection voltage around 3.0V, very low quiescent current consumption, and operation over a wide temperature range. An external pull-up resistor is required for the open-drain output, and its value should be chosen according to the specific application's needs. The R3112N301C-TR-FA is a robust solution for voltage monitoring and reset functionalities in numerous electronic applications.