The R5426D119FA-TR is a voltage detector IC manufactured by Ricoh. This integrated circuit is engineered to monitor voltage levels in electronic systems and initiate a reset signal or other actions when the voltage drops below a predetermined threshold. It is essential for maintaining the stability and reliability of various electronic devices by preventing malfunctions arising from voltage fluctuations.

Applications

• Microprocessor-based Systems: Monitors the power supply and resets the microprocessor in case of voltage drops, preventing data corruption and system crashes.
• Battery-Powered Equipment: Tracks battery voltage to prevent deep discharge, protecting the battery and extending its operational lifespan.
• Power Management Circuits: Offers undervoltage lockout (UVLO) to safeguard sensitive components from operating at insufficient voltage levels.
• Real-Time Clocks (RTC): Ensures continuous functionality of the RTC even during brief power outages.
• Memory Protection: Protects volatile memory by triggering a data backup process upon detection of a voltage drop.

Features

• Minimal Supply Current: Reduces power consumption, making it suitable for battery-operated applications.
• Precise Detection Voltage: Guarantees accurate monitoring of voltage levels.
• Integrated Hysteresis: Prevents oscillations or chattering around the threshold voltage.
• Compact Package: Simplifies integration into small electronic devices.
• Open Drain Output: Facilitates flexible connection to a variety of logic circuits.

Benefits

• Enhanced System Reliability: Prevents malfunctions and data loss due to voltage drops.
• Prolonged Battery Life: Low power consumption helps extend the operating time of battery-powered devices.
• Simplified Circuit Design: Integrated features minimize the need for external components.
• Improved System Protection: Shields vulnerable components from damage caused by undervoltage conditions.
• Cost-Effective Solution: Provides a reliable and affordable solution for voltage monitoring and protection.

Additional Details

The R5426D119FA-TR typically operates within a specific voltage and temperature range, as outlined in the Ricoh datasheet. It is commonly available in a small SOT-23 package, making it easy to incorporate into various PCB layouts. The device output is an open drain N-channel MOSFET, requiring a pull-up resistor connected to a voltage source. The detection voltage is fixed at a precise value, such as 1.19V, with a specified tolerance. Hysteresis is usually in the millivolt range, preventing unstable switching. The supply current is generally in the microampere range, ensuring energy efficiency. This voltage detector is critical in applications demanding stable voltage operation, such as portable devices and industrial control systems.