The R5426N128EA-TR-FA is a voltage detector IC manufactured by Ricoh. It is a highly precise, low-power consumption voltage detector primarily used for monitoring voltage levels in various electronic devices. It is designed to trigger a reset signal when the monitored voltage falls below a specific threshold, thus protecting the system from undervoltage conditions.

Applications

• Microcontroller Reset Circuits: Ensures reliable microcontroller operation by initiating a reset when the voltage drops below the defined threshold.
• Power Management Circuits: Monitors battery voltage levels in portable and battery-powered devices.
• Voltage Monitoring in Industrial Equipment: Protects sensitive electronic components in industrial applications from damage caused by power fluctuations.
• Backup Power Systems: Detects the transition from main power to backup power sources.
• Consumer Electronics: Found in devices such as smartphones, tablets, and digital cameras to ensure stable power management and protection.

Features

• High-Precision Detection Voltage: Delivers accurate voltage monitoring and reset triggering.
• Low Power Consumption: Extends battery lifespan in portable devices by minimizing energy usage.
• Compact Package Size: Well-suited for applications where space is limited.
• Integrated Hysteresis: Minimizes chattering and prevents false triggering due to minor voltage fluctuations.
• Open Drain Output: Provides versatility in interfacing with a variety of logic circuits.

Benefits

• Protects Against Data Corruption: Prevents data loss by resetting the microcontroller before it enters an unstable state due to low voltage.
• Ensures System Stability: Provides reliable operation by resetting the system in the event of power supply irregularities.
• Extends Battery Life: Low power consumption contributes to increased battery lifespan in portable applications.
• Simplifies Circuit Design: Reduces the complexity of circuit design with integrated voltage detection.
• Improves System Reliability: Provides a dependable and robust voltage monitoring solution.

Additional Details

The R5426N128EA-TR-FA features a detection voltage of 2.8V. It is typically packaged in a small SOT-23 or similar surface-mount package. The hysteresis voltage is designed to avoid unwanted resets caused by noise or slight voltage variations around the threshold. The open-drain output allows for seamless integration with other components, facilitating wired-OR logic implementations. Its minimal supply current is beneficial for battery-driven devices where conserving power is critical. The device is designed to operate efficiently across a broad temperature range.