NCID(V) Bi-Directional Ceramic Digital Isolators onsemi NCID(V) Bi-Directional Ceramic Digital Isolators are galvanically isolated full-duplex, bi-directional, high-speed dual-channel digital isolators offered in a 16-pin wide-body small outline package. The NCID9210 supports isolated communications allowing digital signals to communicate between systems without conducting ground loops or hazardous voltages.