August 2006

Rev 6

1/9

9

USBUF01P6

IPAD™

EMI filter and line termination for USB upstream ports

Applications

EMI Filter and line termination for USB upstream

ports on:

Features

termination for USB upstream ports

bypassing capacitors.

Description

The USB specification requires upstream ports to

be terminated with pull-up resistors from the D+

and D- lines to Vbus. On the implementation of

USB systems, the radiated and conducted EMI

should be kept within the required levels as stated

by the FCC regulations. In addition to the

requirements of termination and EMC

compatibility, the computing devices are required

to be tested for ESD susceptibility.

The USBUF01P6 provides the recommended line

termination while implementing a low pass filter to

limit EMI levels and providing ESD protection

which exceeds IEC 61000-4-2 level 4 standard.

The device is packaged in a SOT-666 which is the

smallest available lead frame package (45%

smaller than the standard SOT323).

Benefits

ports

IEC 61000-4-2 level 4

boards

and full speed data transmission)

TM: IPAD is a trademeark of STMicroelectronics

Functional diagram

Complies with the following standards:

Order codes

IEC 61000-4-2 level4:

15 kV(air discharge)

8 kV(contact discharge)

MIL STD 883E-Method 3015-7:

Class 3 C = 100 pF R = 1500

Ω

3 positive strikes and 3 negative strikes (F = 1 Hz)

Part Number

Marking

USBUF01P6

U

SOT-666IP

(Internal pad)

3.3 V

Rp

Ct

Rt

Ct

Rt

D1

Grd

D2

D4

D3

3.3 V

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