STMicroelectronics ECMF4-20A42N10

Overview

ECMF4-20A42N10 from STMicroelectronics is a 2-lane, high-speed common mode filter with integrated ESD protection for differential serial interfaces. It supports HDMI 2.0 (5.94 Gbps), USB 3.1 Gen 1 (5 Gbps), MIPI Gear3 (5.83 Gbps), DisplayPort HBR2 (5.4 Gbps), and HDMI 2.1 (12 Gbps) while providing ±8 kV contact / ±15 kV air discharge ESD protection per IEC 61000-4-2 Level 4.

For engineers reviewing the ECMF4-20A42N10 datasheet, ECMF4-20A42N10 pinout, ECMF4-20A42N10 application, or ECMF4-20A42N10 equivalent, key selection criteria include differential bandwidth (5.0 GHz), common mode attenuation at LTE/GPS/WLAN frequencies, low DC resistance (5.5 Ω), ultra-thin µQFN10L package (0.5 mm max height), and dual-lane ESD filtering capability for compact high-speed PCB layouts.

Technical Context

This device integrates four ESD diodes and two common mode chokes in a single µQFN10L package to simultaneously suppress differential-mode insertion loss and common-mode noise on two independent high-speed lanes. Its 5.0 GHz differential cutoff frequency and sub-0.45 pF diode capacitance preserve signal integrity up to 12 Gbps (HDMI 2.1).

The architecture delivers frequency-selective common mode rejection: −23 dB at 1.5 GHz (LTE Band 1), −25 dB at 2.4 GHz (Wi-Fi/Bluetooth), and −23 dB at 2.7 GHz (LTE Band 7), while maintaining <5.5 Ω DC series resistance and <10 V clamping voltage at 1 A TLP current.

Key Specifications

Pinout & Package

ECMF4-20A42N10 uses a 2.20 mm × 1.35 mm × 0.45 mm µQFN10L package with exposed thermal pad (pin 3 and 8 are GND). The 0.4 mm pitch, 10-terminal layout enables dense routing in space-constrained mobile and portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar common mode filter with ESD protection applications.

Compared with TPD4E001DQAR and EMIF06-MSD02, ECMF4-20A42N10 uniquely balances dual-lane integration, 5.0 GHz bandwidth, and 0.45 pF capacitance in a 2.2 × 1.35 mm footprint-making it optimal for space-constrained 4K video and high-speed mobile interfaces where signal integrity and ESD robustness are co-critical.

Availability

ECMF4-20A42N10 is available at Aetrix Electronics and suitable for notebook, streaming box, set-top box, and portable device designs requiring stable component supply, high-volume production readiness, and long-term lifecycle support for consumer electronics programs.

Supply support for ECMF4-20A42N10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MEMS, power, and microcontroller solutions for automotive, industrial, and consumer markets.

ECMF4-20A42N10 belongs to ST's ECOPACK®-qualified ESD protection portfolio, engineered specifically for high-speed serial interface noise suppression in space-constrained portable and multimedia devices.

FAQ

What is the maximum data rate supported by ECMF4-20A42N10?

ECMF4-20A42N10 supports differential signaling up to 12 Gbps, validated via HDMI 2.1 (12 Gbps) eye diagram testing with worst-case cable and CTLE equalization. Its 5.0 GHz −3 dB differential bandwidth and 0.4 pF diode capacitance ensure minimal intersymbol interference at this rate.

Can ECMF4-20A42N10 be used for USB 3.2 Gen 2 (10 Gbps) applications?

Yes - USB 3.2 Gen 2 (10 Gbps) eye diagrams were tested and published in the official datasheet (Figures 7–8). The device maintains >0.8 UI eye opening with <10% jitter increase, meeting USB-IF compliance requirements when placed within 5 mm of the connector.

How does the µQFN10L package affect thermal performance?

The µQFN10L package features two dedicated GND terminals (pins 3 and 8) and an exposed thermal pad that connects directly to the PCB ground plane. This design achieves ≤25 °C/W junction-to-board thermal resistance, enabling reliable 100 mA RMS operation at +85 °C ambient.

Is PCB layout guidance available for optimal ESD and signal integrity performance?

Yes - ST provides validated footprint (1.75 × 0.7 mm), stencil opening (1.71 × 0.66 mm, 100 μm thickness), and symmetric trace routing recommendations in DS11458 Rev 3 (pages 10–11). Critical practices include closed vias under pads, balanced copper distribution, and GND pour under the entire device body.