High-speed common-mode EMI filter offers integrated ESD protection
The ECMF4-40A100N10 from STMicroelectronics provides highly effective noise suppression for high-speed interfaces such as USB Type-C® ports. The integration of ESD protection helps to save board space and reduce parasitic effects.

STMicroelectronics has introduced the ECMF4-40A100N10 integrated common-mode filter to enable the suppression of EMI or RF interference on high-speed differential serial buses.
High-speed interface technologies for which this filter can provide protection include:
- HDMI v2.1 and earlier
- USB4
- USB 3.x
- USB 2.0
- Ethernet
- MIPI
- DisplayPort
By integrating noise suppression and ESD protection functions into a single device, the ECMF4-40A100N10 helps designers to keep the effect of parasitic capacitance and inductance to a minimum.
The filter can protect and filter one or two differential lanes. It is supplied in a compact 10-lead QFN package measuring 1.4 mm x 2.2 mm x 0.5 mm.