The R3112N221A-TR-FA is a voltage detector IC manufactured by Ricoh. It's designed to monitor voltage levels and provide a reset signal to a microcontroller or other digital circuit when the voltage drops below a specific threshold. This ensures that the system operates correctly and prevents erroneous behavior due to voltage fluctuations.

Applications

• Microcontroller Reset Circuits: The primary application is to provide a reliable reset signal to microcontrollers during power-up, power-down, or brown-out conditions.
• Power Supply Monitoring: Used to monitor the output voltage of power supplies and generate an alarm or shutdown signal if the voltage falls outside the acceptable range.
• Battery-Powered Devices: Protects battery-operated devices from deep discharge by detecting low battery voltage and initiating a shutdown sequence.
• Industrial Control Systems: Ensures the stable operation of industrial equipment by monitoring voltage levels and preventing malfunctions due to voltage drops.
• Automotive Electronics: Monitors voltage levels in automotive systems to ensure the proper functioning of electronic components.

Features

• High-Accuracy Voltage Detection: Precisely monitors voltage levels with a high degree of accuracy.
• Built-in Delay Circuit: Incorporates a delay circuit to prevent spurious resets caused by transient voltage dips.
• Low Current Consumption: Consumes very little current, making it suitable for battery-powered applications.
• Small Package Size: Available in a compact package for space-constrained applications.
• Wide Operating Voltage Range: Operates over a wide range of input voltages.

Benefits

• Improved System Stability: Prevents system crashes and malfunctions due to voltage fluctuations.
• Reliable Reset Function: Ensures a proper reset of the microcontroller during power-up or brown-out conditions.
• Extended Battery Life: Reduces power consumption in battery-powered devices, extending their operating time.
• Simplified Circuit Design: The integrated delay circuit reduces the need for external components, simplifying circuit design.
• Enhanced System Reliability: Protects the system from damage due to undervoltage conditions.

The R3112N221A-TR-FA voltage detector has a detection voltage of 2.2V. The 'TR' suffix indicates that the device is supplied in tape and reel packaging for automated assembly. The built-in delay circuit ensures that the reset signal is asserted only after the voltage has been stable for a certain period, preventing false resets. The low current consumption of this device makes it an excellent choice for portable and battery-operated applications, where minimizing power usage is critical.

The precise voltage detection and reliable reset function of the R3112N221A-TR-FA contribute to the overall stability and reliability of electronic systems. By providing a clean and accurate reset signal, this voltage detector helps to prevent system errors and ensures that the system operates correctly even in the presence of voltage fluctuations.