The R3130N33EA-TR-F is a voltage detector IC manufactured by Ricoh. This IC is designed to monitor the supply voltage and generate a reset signal when the voltage drops below a pre-defined threshold. This function is critical for preventing system malfunctions and ensuring reliable operation in various electronic devices.

Applications

• Microcontroller reset circuits
• Power management systems
• Battery-powered devices
• Industrial control systems
• Consumer electronics

Features

• High-accuracy detection voltage: Provides precise voltage detection for reliable reset operation.
• Low supply current: Minimizes power consumption, making it ideal for battery-powered applications.
• Built-in hysteresis: Prevents oscillation and chattering of the reset signal around the threshold voltage.
• Small package: Available in compact SOT packages for space-saving designs.
• Open-drain output: Offers flexibility in interfacing with different microcontrollers and digital logic circuits.

Benefits

• Prevents data corruption: Resets the microcontroller during undervoltage conditions to prevent data corruption in memory.
• Enhances system reliability: Ensures the system operates within safe voltage limits, improving overall reliability.
• Extends battery life: Low power consumption contributes to longer battery life in portable devices.
• Simplifies circuit design: Reduces the need for external components for voltage monitoring and reset functions.
• Protects against voltage drops: Safeguards the system from unexpected voltage drops that can lead to unpredictable behavior.

Additional Details

The R3130N33EA-TR-F features a detection voltage of 3.3V. It is typically packaged in a SOT-23 or similar small surface-mount package. The 'TR' in the part number indicates that it is supplied on tape and reel for automated assembly. The operating temperature range is generally between -40°C and +85°C. The open-drain output requires a pull-up resistor for proper operation. Detailed electrical characteristics, timing diagrams, and application notes can be found in the official datasheet from Ricoh. The built-in hysteresis ensures stable operation even with noisy supply voltages. When integrating this IC into a design, proper decoupling capacitors should be placed close to the supply pins to minimize noise and ensure reliable voltage detection. The low quiescent current makes it well-suited for applications where minimizing power consumption is a primary concern.