USB3300 datasheet(48/49 Pages) SMSC

48 / 49 page

Hi-Speed USB Host, Device or OTG PHY with ULPI Low Pin Interface

Datasheet

Revision 1.06 (07-19-06)

SMSC USB3300

DATASHEET

7.4.2

IEC61000-4-2 Performance

The IEC61000-4-2 ESD specification is an international standard that addresses system-level immunity

to ESD strikes while the end equipment is operational. In contrast, the HBM ESD tests are performed

at the device level with the device powered down.

SMSC contracts with independent laboratories to test the USB3300 to IEC61000-4-2 in a working

system. Reports are available upon request. Please contact your SMSC representative, and request

information on 3rd party ESD test results. The reports show that systems designed with the USB3300

can safely dissipate ±15kV air discharges and ±8kV contact discharges per the IEC61000-4-2

specification without additional board level protection.

Both air discharge and contact discharge test techniques for applying stress conditions are defined by

the IEC61000-4-2 ESD document.

7.4.2.1

AIR DISCHARGE

To perform this test, a charged electrode is moved close to the system being tested until a spark is

generated. This test is difficult to reproduce because the discharge is influenced by such factors as

humidity, the speed of approach of the electrode, and construction of the test equipment.

7.4.2.2

CONTACT DISCHARGE

The uncharged electrode first contacts the pin to prepare this test, and then the probe tip is energized.

This yields more repeatable results, and is the preferred test method. The independent test laboratories

contracted by SMSC provide test results for both types of discharge methods.

USB3300 Datasheet(PDF) 48 Page - SMSC Corporation