ECMF02-4CMX8

## **ECMF02-4CMX8** 

## Common mode filter with ESD protection for USB 2.0 interface 

 **Datasheet production data** 

## **Applications** 

Where transient overvoltage protection in ESD sensitive equipment is required, such as: 

- Computers 

- Printers 

- Communication systems 

- Cellular phone handsets and accessories 

- Video equipment 

## **Description** 

## **Features** 

- Integrated common mode filter 

- Differential pair ESD protection 

- 16 V VBUS ESD and EOS protection 

The ECMF02-4CMX8 affords key component integration such as common mode filter D+ and D- lines and ESD protection on all lines. This device offers an optimized flow-through footprint for USB 2.0 applications. 

## **Figure 1. Pin configuration (top view)** 

- ID pin ESD protection 

- Low profile micro QFN-8L package 

- High bandwidth: > 6 GHz 

- Optimized for high speed USB 2.0 

- High common mode attenuation at 900 MHz and 1.8 GHz 

- Support for audio over USB 2.0 thanks to bidirectional ESD protection 

- Ultra compact, low board space 

- Low height: < 0.55 mm 

## **Complies with the following standards:** 

- IEC 61000-4-2 level 4: 

   - 15 kV (air discharge) 

   - 8 kV (contact discharge) 

- RoHS2 compliant 

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This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**ECMF02-4CMX8** 

## **1 Characteristics** 

**Table 1. Absolute maximum ratings (Tamb = 25 °C)** 

|**Symbol**|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|---|
|VPP|Peak pulse voltage(1)|ESD discharge IEC 61000-4-2, level 4<br>Contact discharge on D+/D- pins<br>Contact discharge on VBUSand IDpins<br>Air discharge on all pins|10<br>20<br>30|kV|
|PPP|Peak pulse power (8/20µs) on VBUS||150|W|
|IPP|Peak pulse current (8/20µs) on VBUS||4.8|A|
|Tj|Maximum operating junction temperature||-40 to +125|°C|
|Tstg|Storage temperature range||-55 to +150|°C|



1. Measurements done on IEC 61000-4-2 test bench. For further details see Application note AN3353. 

**Figure 2. Electrical characteristics - definitions** 

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**Characteristics** 

**Table 2. Electrical characteristics (values, Tamb = 25 °C)** 

|**Symbol**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|
|**Data lines**||||||
|VBR|IR= 1 mA|6|||V|
|IRM|VRM= 5.5 V per line|||100|nA|
|RDC|DC serial resistance on data line||3|4|Ω|
|**VBUS**||||||
|VBR|IR= 1 mA|15|16.5|18|V|
|IRM|VRM= 12 V|||50|nA|
|VCL|Clamping voltage. IPP= 1 A, tp= 8/20 µs|||20|V|
|VCL|Clamping voltage. IPP= 2.5 A, tp= 8/20 µs|||24|V|
|**ID**||||||
|VBR|IR= 1 mA|6|||V|
|IRM|VRM= 1.5 V per line|||100|nA|



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**Characteristics** 

**ECMF02-4CMX8** 

**Figure 3. SDD21 differential attenuation measurement (Z0 diff = 90** Ω **) for data lines D+ and D-** 

**Figure 4. SCC21 common mode attenuation measurement (Z0 com = 45** Ω **)** 

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**Characteristics** 

**Figure 5. ID frequency response measurement (Z0 = 75** Ω **)** 

**Figure 6. Differential (ZDD21) and common mode (ZCC21) impedance versus frequency** 

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**Characteristics** 

**ECMF02-4CMX8** 

## **Figure 7. ESD test conditions** 

## **Figure 8. ESD response to IEC 61000-4-2 (+8 kV contact discharge) on VBUS** 

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**Characteristics** 

**Figure 9. ESD response to IEC 61000-4-2 (-8 kV contact discharge) on VBUS** 

## **Figure 10. ESD response to IEC 61000-4-2 (+8 kV contact discharge) on ID** 

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**Characteristics** 

**ECMF02-4CMX8** 

**==> picture [346 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 11. ESD response to IEC 61000-4-2 (-8 kV contact discharge) on ID<br>**----- End of picture text -----**<br>


## **Figure 12. ESD response to IEC 61000-4-2 (+8 kV contact discharge) on differential lane** 

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**Characteristics** 

**Figure 13. ESD response to IEC 61000-4-2 (-8 kV contact discharge) on differential lane** 

**Figure 14. Eye diagram (loaded by Zdiff = 90**  **) Figure 15. Eye diagram (loaded by Zdiff = 90**  **) with USB2.0 [mask 1] board only with USB2.0 [mask 1] board with ECM02-4CMX8** 

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**Characteristics** 

**ECMF02-4CMX8** 

**Figure 16. TDR measurement (loaded by Zdiff = 90**  **), rise time 400 ps** 

## **Figure 17. HS sync** 

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**Characteristics** 

## **Figure 18. Total harmonic distortion on differential lanes** 

## **Figure 19. Crosstalk on differential lanes** 

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**ECMF02-4CMX8** 

**Application schematic** 

## **2 Application schematic** 

## **Figure 20. Application schematic** 

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**Package information** 

## **3 Package information** 

- Epoxy meets UL94, V0 

- Lead-free packages 

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK[®] packages, depending on their level of environmental compliance. ECOPACK[®] specifications, grade definitions and product status are available at _: www.st.com._ ECOPACK[®] is an ST trademark. 

## **3.1 Micro QFN-8L package information** 

## **Figure 21. Micro QFN-8L package outline** 

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**Table 3. Micro QFN-8L package mechanical data** 

||**Table 3. Micro QFN-8Lpackage mechanical data**|**Table 3. Micro QFN-8Lpackage mechanical data**|**Table 3. Micro QFN-8Lpackage mechanical data**|**Table 3. Micro QFN-8Lpackage mechanical data**|**Table 3. Micro QFN-8Lpackage mechanical data**|**Table 3. Micro QFN-8Lpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches(1)**|||
||**Typ.**|**Min.**|**Max.**|**Typ.**|**Min.**|**Max.**|
|A|0.50|0.45|0.55|0.020|0.018|0.022|
|A1|0.02|0.00|0.05|0.0008|0.00|0.002|
|b|0.20|0.15|0.25|0.008|0.006|0.010|
|D|2.50|2.45|2.55|0.098|0.096|0.100|
|E|1.20|1.15|1.25|0.047|0.045|0.049|



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**Package information** 

**Table 3. Micro QFN-8L package mechanical data (continued)** 

||**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|**Table 3. Micro QFN-8L package mechanical data (continued)package mechanical data (continued)ackage mechanical data (continued)ge mechanical data (continued)e mechanical data (continued)(continued)continued))**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches(1)**|||
||**Typ.**|**Min.**|**Max.**|**Typ.**|**Min.**|**Max.**|
|e|0.50|0.45|0.55|0.020|0.018|0.022|
|L|0.40|0.30|0.50|0.016|0.012|0.020|



1. Values in inches are converted from mm and rounded to 4 decimal digits. 

**Figure 22. Footprint Figure 23. Marking** 

## **Figure 24. Tape and reel specifications** 

_Note: More packing information is available in the application notes: AN1751: “EMI Filters: Recommendations and measurements”_ 

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**Ordering information** 

## **4 Ordering information** 

## **Figure 25. Ordering information scheme** 

**Table 4. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|ECMF02-4CMX8|KG|Micro QFN-8L|3.7 mg|3000|Tape and reel|



For the latest information on available order codes see the product pages on: _www.st.com._ 

## **5 Revision history** 

**Table 5. Document revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|19-Sep-2012|1|Initial release.|
|27-May-2014|2|Updated_Figure 24_,_Figure 25_and reformatted the document.|
|05-May-2015|3|Added_Figure 6_.<br>Updated_Table 1_.<br>Format updated to current standard.|



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