RF Common Mode Filters Walsin RF Common Mode Filters (CMF) support both USB 2.0 and IEEE1394 applications with rated currents of 100mA, 200mA, and 300mA. These devices offer common mode attenuation at 8.0dB or 9.0dB @ 130MHz to 240MHz-1GHz, and a differential mode insert loss from 0.6dB to 1.1dB @ 240MHz. Walsin RF Common Mode Filters are RoHS compliant.