What this I²C-to-1-Wire bridge does
The Maxim Integrated DS2482X-100+T is a single-channel bridge that translates I²C master commands to the 1-Wire® protocol, letting a standard I²C bus talk to 1-Wire® devices like temperature sensors, EEPROMs, and battery monitors. It operates from a 2.9V to 5.5V supply, so it works on both 3.3V and 5V logic rails without a separate level shifter. Rated for the industrial temperature range of -40°C to 85°C, it fits into outdoor telecom, factory automation, and HVAC controller environments. The 9-WLP package (1.53x1.53 mm) is tiny — board space is minimal, but rework needs a hot-air station and a steady hand; the WLP has no leads to inspect, so alignment and solder-paste volume are critical.
Sourcing and lifecycle status
The DS2482X-100+T is listed as Active in production — no end-of-life notice, no last-time-buy pressure. It is ROHS3 compliant, so it passes current environmental regulations for EU and global markets.
What the supply current and voltage mean for your BOM
Supply current is 750 µA typical — low enough that it won't strain a 3.3V or 5V rail in a power-budgeted design, but not a nano-power part; if the system sleeps, the bridge draws that current whenever the I²C bus is active. The wide supply range (2.9V to 5.5V) means you can run it from a 3.3V or 5V rail without a regulator change — useful when the same PCB goes into multiple product variants.