The DS2482-800 is an 1-Wire® master I²C bridge device manufactured by Dallas Semiconductor (now Maxim Integrated). This device enables a microcontroller or other I²C master to easily communicate with and control 1-Wire slave devices. It provides a cost-effective and efficient solution for integrating 1-Wire devices into I²C-based systems.

Applications

• Temperature Monitoring Systems: Used to interface with 1-Wire temperature sensors in HVAC systems, environmental monitoring, and data logging applications.
• Asset Tracking: Employed in asset tracking systems to communicate with 1-Wire ID chips attached to valuable assets.
• Access Control Systems: Integrated into access control systems to interface with 1-Wire key fobs and electronic locks.
• Medical Devices: Utilized in medical equipment for patient monitoring and data collection using 1-Wire sensors.
• Industrial Automation: Applied in industrial control systems for interfacing with 1-Wire sensors and actuators.

Features

• I²C to 1-Wire Bridge: Provides a bidirectional bridge between the I²C bus and the 1-Wire bus, simplifying communication with 1-Wire devices.
• 800kHz I²C Clock Speed: Supports I²C clock speeds up to 800kHz, enabling fast data transfer rates.
• Multiple 1-Wire Channels: Offers multiple 1-Wire channels, allowing the control of multiple 1-Wire devices on a single I²C bus.
• Automatic 1-Wire Device Discovery: Automatically detects and identifies 1-Wire devices connected to the bus.
• Low Power Consumption: Designed for low power consumption, making it suitable for battery-powered applications.

Benefits

• Simplified System Design: Simplifies the integration of 1-Wire devices into I²C-based systems, reducing development time and complexity.
• Increased System Performance: High I²C clock speed enables fast data transfer rates, improving overall system performance.
• Enhanced System Flexibility: Multiple 1-Wire channels allow for the control of multiple 1-Wire devices on a single I²C bus.
• Reduced Component Count: Integrates the 1-Wire master functionality into a single chip, reducing component count and board space.
• Improved Power Efficiency: Low power consumption extends battery life in portable applications.

Additional Details

The DS2482-800 operates at a supply voltage of 2.8V to 5.25V. It is available in a small 8-pin TDFN (Thin Dual Flat No-Lead) package. The operating temperature range spans from -40°C to +85°C. The device supports various 1-Wire functions, including ROM search, alarm search, and conditional search. It also includes a built-in strong pull-up for 1-Wire communication. The I²C slave address is configurable, allowing multiple DS2482-800 devices to be used on the same I²C bus. The device's automatic 1-Wire device discovery feature simplifies the process of identifying and configuring connected 1-Wire slaves. It is commonly used in applications that require interfacing with a wide range of 1-Wire sensors and devices. Detailed information, including timing diagrams, electrical characteristics, and application examples, can be found in the Maxim Integrated datasheet.