USB3803 datasheet(85/99 Pages) MICROCHIP

85 / 99 page

 2014-2015 Microchip Technology Inc.

DS00001691B-page 85

USB3803

In addition to defining the ESD tests, EN 61000-4-2 also categorizes the impact to equipment operation when the strike

occurs (ESD Result Classification). The USB3803 maintains an ESD Result Classification 1 or 2 when subjected to an

EN 61000-4-2 (level 4) ESD strike.

Both air discharge and contact discharge test techniques for applying stress conditions are defined by the EN 61000-4-

2 ESD document.

10.12.3

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.

10.12.4

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 Microchip provide

test results for both types of discharge methods.

10.13 AC Specifications

10.13.1

REFCLK

External Clock:50% duty cycle ± 10%, ± 350ppm, Jitter < 100ps rms.

10.13.2

SERIAL INTERFACE

The Microchip Hub conforms to AC specifications as set forth in the I2C Specification for Slave-Only devices.

10.13.3

USB 2.0

The Microchip Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB

2.0 Specification. Please refer to the USB 2.0 Specification which is available from the www.usb.org web site.

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