CMF with ESD Protection for High-Speed Data Commun

By Nexperia 539

CMF with ESD Protection for High-Speed Data Commun

High-speed wired lines and popular wireless standards frequently interfere in the gigahertz range, resulting in EMI disturbance for mobile users. Nexperia has designed common mode filters with electrostatic discharge protection for 1, 2, and 3 differential line pairs that attenuate common mode signals and deliver superior communications experiences. Their solutions provide common mode noise suppression over all bands with high suppression at 2.5 GHz and 5 GHz, the fundamentals of USB 3.x.

Nexperia's PCMF series integrate ESD protection and CMF in a single device which offers unmatched overall performance. When comparing a standalone CMF solution to a combination of discrete CMF and discrete 7 GHz or 14 GHz differential pass band ESD protection, performance losses are notable. In contrast to this, their PCMFxUSB3B already delivers a performance advantage of more than 1 GHz compared to the standalone CMF without ESD protection. The PCMFxUSB3B also brings an advantage in common mode rejection (CMR) at the critical USB3 fundamentals; while the standalone CMF shown has an attenuation of -18 dB at 2.5 GHz and -13.7 dB at 5 GHz, PCMFxUSB3B offers respectively -22 dB and -16.4 dB CMR at these fundamentals.

Nexperia's PCMF family is available in wafer level chip-size package known as WLCSP. Five, ten, and fifteen bump variants of this package are proposed, respectively catering to single-, dual-, and triple-channel needs.


  • Integrated Common Mode Filter and Protection Leaflet
  • Protection up to six lines (Tx +/-, Rx +/-, D +/-)
  • Wide differential passband (up to 8.1 GHz 3 dB frequency)
  • Up to -32 dB CM rejection at 2.5 GHz and up to -19 dB at 5 GHz (USB3 fundamentals)
  • Up to -31 dB CM rejection at 3 GHz HDMI fundamental
  • Low-inductance and space-saving WLCSP packages
  • Footprint-compatible with ESD-only solutions
  • Exceeding IEC 61000-4-2 ESD ruggedness standard
  • Effective 1-, 2-, and 3-line pairs protection and filtering
  • USB 3.x and HDMI2 optimized common mode suppression
  • Proven 10+ Gbps communications lines protection
  • Providing high system-level robustness for sensitive SoCs
  • Minimized reflections compared to discrete CMF + additional ESD
  • Low clamping and dynamic resistance using TrEOS technology