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USBUF01P6

EMI FILTER AND LINE TERMINATION

FOR USB UPSTREAM PORTS

REV. 2

SOT-666IP

(Internal Pad)

May 2004

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 IEC61000-4-2 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

boards

and high speed data transmission)

Order Codes

Part Number

Marking

USBUF01P6

U

IPAD™

FUNCTIONAL DIAGRAM

3.3 V

Rp

Ct

Rt

Ct

Rt

D1

Grd

D2

D4

D3

3.3 V

COMPLIES WITH THE FOLLOWING STANDARDS:

15kV

(air discharge)

8kV

(contact discharge)

Class 3 C = 100 pF R = 1500

Ω

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