ECMF4-2459A6M1 Automotive Common-Mode Filter STMicroelectronics ECMF4-2459A6M1 Automotive Common-Mode Filter (CMF) is designed to suppress EMI/RFI (Electromagnetic Interference/Radio-Frequency Interference) on high-speed buses. The ECMF4-2459A6M1 is optimized for use for HDMI 2.0, HDMI2.1, HDMI 1.4, DisplayPort, FPD link III, GMSL, USB3.2, and MIPI interfaces. The device is designed to replace discrete common mode chokes and LTCC (Low-Temperature Co-Fired Ceramic) filters.