2.3 Serial Data (SDA)

The SDA pin is an open‑drain bidirectional input/output pin used to serially transfer data to and from the device. The SDA pin must be pulled high using an external pull‑up resistor (not to exceed 10 kΩ in value) and may be wire-ORed with any number of other open‑drain or open‑collector pins from other devices on the same bus.