The R5405K186KD-TR is a voltage detector IC manufactured by Ricoh Electronic Devices Co., Ltd. It's designed to monitor voltage levels in electronic circuits and provide a reset signal when the voltage drops below a certain threshold. This IC is commonly used in microcontrollers, memory devices, and other digital circuits to prevent data corruption and ensure stable operation.

Applications

• Microcontroller reset circuits
• Memory protection
• Power supply monitoring
• Battery-powered devices
• Industrial control systems

Features

• Low supply current consumption
• High-accuracy detection voltage
• Built-in hysteresis
• Small package size
• Open drain output

Benefits

• Ensures proper system initialization and prevents erratic behavior of microcontrollers during power-up or brown-out conditions.
• Protects data stored in volatile memory by triggering a reset before the supply voltage falls below the minimum operating voltage.
• Conserves power in battery-operated devices due to its low current consumption.
• Simplifies circuit design and reduces board space due to its small package.
• Provides flexibility in interfacing with other circuits due to the open drain output.

Technical Specifications

The R5405K186KD-TR has a detection voltage of 1.8V. It features a low supply current, typically in the order of a few microamperes. The built-in hysteresis prevents chattering around the threshold voltage. The output is an N-channel open drain, which requires a pull-up resistor. The operating temperature range is typically -40°C to +85°C. The package type should be verified in the datasheet, but it's often a small SOT package. Refer to the Ricoh datasheet for complete specifications, including the precise supply voltage range, output voltage levels, and temperature characteristics.

The R5405 series offers a range of detection voltage options, allowing designers to select the appropriate threshold for their specific application. Its reliability and stability make it a popular choice for voltage monitoring in a wide variety of electronic devices.