Functional description

ECMF02-2HSMX6

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DocID025079 Rev 2

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Functional description

The ECMF02-2HSMX6 is an ESD protected common mode filter especially designed for

USB3.0 Tx/Rx differential pair, for host and device. The USB3.0 is actually made of 3

differential pairs. The first differential pair supports the high speed USB mode (also called

USB2.0 mode). The 2 other differential pairs are used to support the super speed USB mode

in full duplex. Bit rate on super speed USB can reach 5 Gbps. The ECMF02-2HSMX6 is

able to filter the common mode noise from 300 MHz to 6 GHz, helping to make the

application compliant with the electromagnetic interference emission standard such as

CISPR22 or FCC part 15, or EN55022 and avoiding antenna desense on mobile phones,

WiFi/Bluetooth, GPS,/GNSS frequencies. At the same time, the ECMF02-2HSMX6 keeps

the high speed signal integrity and provides an efficient ESD protection.

More application information available in following AN:

•

Application Note AN4356: "Antenna desense on handheld equipment"

•

Application Note AN4511: "Common Mode filters"

•

Application Note AN4540: "MHL link filtering and protection"

Figure 2. Functional diagram

A typical application diagram is shown in Figure 3. ST offers a global approach to USB3.0

interface by providing a comprehensive range of dedicated products.

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1

3

6

4

5

D+ connector

D- connector

GND

To be left floating

D+ IC

D- IC