Part Information Review and Update

flux

4:42

Planning terminal identification.

Analyzing the PCB layout.

Analyzing the schematic.

Looking for "ECMF2-40A100N6 exact MPN, manufacturer, package, pin count, description, key electrical specs, and complete pin table including pin names/functions." in ecmf2-40a100n6.pdf

Looking for "What package/case code, footprint dimensions, and mechanical package information are given for ECMF2-40A100N6? Include land pattern related dimensions if present." in ecmf2-40a100n6.pdf

Looking for "For ECMF2-40A100N6, extract the functional description and main electrical characteristics: number of lines, common mode attenuation or filtering role, leakage current, capacitance, DCR, current rating, ESD capability if stated, and operating temperature range." in ecmf2-40a100n6.pdf

Summarizing mismatches in properties.

Running multiple web searches.

Found 0 results.

I reviewed the part project for ECMF2-40A100N6 against the currently set ST datasheet URL.
Summary
  • Datasheet URL: already present, so no update was needed.
  • Pin count: matches the datasheet at 6 pins.
  • Symbol terminal names/numbers: match the datasheet pinout.
  • Footprint: a 6-pad footprint exists, which is directionally consistent with the datasheet package.
  • Main issues found:
    • Project Part Type looks incorrect/misleading.
    • All schematic terminals have Pin Type = Unspecified.
    • Terminal pin descriptions are missing.
    • I could not fully verify the exact land pattern geometry from the datasheet text extraction available here, so footprint verification is only partial.

Part info checked

FieldCurrent projectDatasheet cross-checkResult
MPNECMF2-40A100N6MatchesOK
ManufacturerSTMicroelectronicsMatchesOK
Datasheet URLSetOfficial ST PDF already setOK
Designator PrefixFLReasonable for filter partOK
MountSurface MountMatches μQFN package styleOK
Description2 line common mode choke, 100 mA, 3 Ω typ, -55 °C to 125 °CBroadly consistent, but incomplete vs datasheet functionMinor issue
Part TypeInductorsDatasheet describes a common mode filter with ESD protection, not a plain inductorMismatch
Key specs from the datasheet
  • Package: μQFN-6L
  • Pins: 6
  • Function: common mode filter with ESD protection for high-speed differential interfaces
  • Protected lines: 2 lines / 1 differential lane
  • DC serial resistance: 3.0 Ω typ
  • Max RMS current: 100 mA
  • Reverse working voltage: 5 V
  • Breakdown voltage: 5.3 V min, 5.8 V typ
  • Capacitance: 0.25 pF typ, 0.40 pF max
  • ESD robustness: ±9 kV contact, ±20 kV air
  • Operating temperature: -55 °C to +125 °C
Pinout cross-check
The datasheet pinout and the project symbol align as:

Table

PinDatasheet functionProject symbolResult
1D+ to connectorPresentOK
2D- to connectorPresentOK
3GNDPresentOK
4GNDPresentOK
5D- to ICPresentOK
6D+ to ICPresentOK
Symbol review
What matches:
  • 6 terminals present, matching the datasheet pin count.
  • Pin numbering appears consistent with the datasheet.
  • Terminal naming is sensible and matches functional intent.
What needs improvement:
  • Every terminal is currently set to Pin Type: Unspecified. For a datasheet-driven part audit, pin metadata should be explicit and exact. The recommended workflow is to use the datasheet as the single source of truth, match pin count exactly, and flag any missing pin metadata rather than guessing
  • Suggested pin types:
    • Pins 1, 2, 5, 6: Passive
    • Pins 3, 4: Ground
  • Pin Description properties are missing and should be added with short functional labels, per the part-sync guidance
Footprint review
What I could verify:
  • The layout contains a Footprint with 6 pads, which is consistent with a μQFN-6L package.
  • So the footprint is structurally plausible.
What I could not fully verify:
  • I do not have enough extracted mechanical-package detail here to confirm:
    • exact body size
    • pad pitch
    • pad dimensions
    • recommended land pattern
    • courtyard/silkscreen accuracy
So the footprint result is:
  • Pad count: OK
  • Exact package geometry: not fully verified

Mismatches / flags

SeverityIssueWhy it matters
HighPart Type = InductorsDatasheet describes an ESD-protected common mode filter, not just an inductor
MediumAll pins are UnspecifiedReduces symbol quality and downstream ERC usefulness
MediumPin descriptions missingMakes the part less clear and less reusable
LowDescription is incompleteIt omits the ESD-protection role and package
LowFootprint geometry not fully verifiedNeed package drawing / land pattern to fully confirm
Recommended cleaned-up description
A better project description would be:
  • Common mode filter with ESD protection for one high-speed differential lane, μQFN-6L, 100 mA max, 3.0 Ω typ, -55 °C to +125 °C
Overall verdict
  • Core identity: correct
  • Pin count and pin naming: correct
  • Footprint pad count: correct
  • Metadata quality: needs cleanup
  • Exact footprint mechanical compliance: still needs a package-drawing check
If you want, I can next fix the project metadata and terminal properties:
  • change Part Type
  • add proper Pin Type values
  • add Pin Description values
  • optionally improve the project description
That follows the standard part-project datasheet-sync workflow for pin/property completion
Fix metadata and pins
Verify footprint geometry
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ECMF2-40A100N6

ECMF2-40A100N6 thumbnail
2 Line Common Mode Choke Surface Mount 100mA DCR 3Ohm (Typ) , -55C ~ 125C The ECMF2-40A100N6 and ECMF4-40A100N10 are highly integrated common mode filters designed to suppress EMI/RFI common mode noise on high speed differential serial buses like HDMI 2.1, HDMI 2.0, HDMI1.4, USB4, USB 3.2 Gen 2, USB 2.0, ethernet, MIPI, Display Port and other high speed serial interfaces. They have a very large differential bandwidth to comply with these standards and can also protect and filter one or two differential lanes. 10.7 GHz differential bandwidth to comply with HDMI 2.1, HDMI 2.0, HDMI 1.4, USB4, USB 3.2 Gen2, USB 2.0, MIPI, Display port 2.0, etc. • High common mode attenuation on WLAN frequencies: – -15 dB at 2.4 GHz – -21 dB at 5.0 GHz – -17 dB at 6.0 GHz • Low serial resistance: 3.0 Ω • Very low PCB space consumption • Thin package: 0.5 mm max. • High reduction of parasitic elements through integration • Lead free and RoHS package • Exceeds IEC 61000-4-2 level 4 standard: – Contact discharge: ◦ ±9 kV (contact discharge, ECMF2-40A100N6) ◦ ±10 kV (contact discharge, ECMF4-40A100N10) – Air discharge: ◦ ±20 kV (air discharge, ECMF2-40A100N6) ◦ ±25 kV (air discharge, ECMF4-40A100N10)

Properties

ECMF2-40A100N6

STMicroelectronics

Filter

st.com/resource/en/datasheet/ecmf2-40a100n6.pdf

FL

Surface Mount

creativecommons.org/licenses/by/4.0/

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