ST launches ECMF04-4HSM10Y, 4HSWM10Y
Integrated low clamping voltage and transient-suppression diodes
Capable of preventing interference with wireless communication equipment


ST Microelectronics launched the ECMF04-4HSM10Y and ECMF04-4HSWM10Y, automotive-grade common-mode filters (CMF) for high-speed serial buses, on the 29th.

The new products integrate low clamping voltage and transient-suppression diodes to protect interface ICs.

Both devices are CMF with automotive-grade certification and automotive surge standard compliance. They have undergone certification and production in accordance with AEC-Q101 requirements, and design and testing have been completed to match automotive surge specifications such as ISO10605.

They can replace discrete common-mode chokes or LTCC (Low-Temperature Cofired Ceramic) devices that are larger in size and do not offer ESD protection capability.

Installed on high-speed data lines for cameras, radar, displays, and multimedia applications, they can prevent interference with wireless communication equipment.

With a footprint of 3.5mm² and height of 0.75mm, they reduce board space, simplify design, and reduce bill-of-materials (BoM) costs.

The ECMF04-4HSM10Y employs 2.2GHz differential bandwidth to suppress common-mode noise in HDMI 1.4 and MIPI connections. It provides deep attenuation of -25dB at 900MHz and -14dB at 1.5GHz, ensuring that radiated noise does not reduce the reception sensitivity of mobile and GPS antennas.

The ECMF04-4HSWM10Y features 3.5MHz bandwidth, extending application scope to LVDS, DisplayPort™, USB 3.1, and HDMI 2.0 buses. It provides attenuation of -30dB at 2.4GHz and -16dB at 5.0GHz, protecting Bluetooth® equipment and V2X (Vehicle-to-Everything) WiFi antennas as well as cellular and GPS systems.

The ECMF04-4HSM10Y and ECMF04-4HSWM10Y are currently in mass production and are supplied in a 2.6mm × 1.35mm QFN10L package. Pricing starts at $0.2 for orders of 1,000 units.