The SOIC-8NB package is pin-compatible with common I²C isolators. I²C is a standard interface for internal communication between different circuits. It is used in IoT and consumer electronics (sensors, displays), industrial automation (sensor networks, monitoring systems, motor control), and the automotive industry (BMS, engine control, sensors). Many Würth Elektronik sensors also support I²C communication.
Protect the interface
Isolators are important for all these applications because they galvanically isolate digital signals, prevent communication errors or data corruption, mitigate potential differences, and improve interference immunity. They are also important for protecting people from voltage spikes and for mitigating the sensitivity of integrated circuits. The I²C interface requires bidirectional data transmission, which must also be supported by isolators.
Internal values
The WPME-CDI2C isolator, designed for bidirectional I²C interface applications for data transmission up to 2 MHz, offers an isolation voltage of up to 3750 VRMS according to UL 1577 and a basic isolation level according to IEC 60747-17 (VDE 0884-17). The isolator features high immunity to system interference with ±150 kV/µs (CMTI common-mode transient immunity). The component is available in two versions: one offers a bidirectional serial data channel (Serial Data Line, SDA) and a bidirectional serial clock channel (Serial Clock Line, SCL). The other offers a bidirectional serial data channel (SDA) and a unidirectional serial clock channel (SCL).
