PACUSBVB

http://onsemi.com

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APPLICATION INFORMATION

The PACUSBVB−D1 provides a complete interface for a single downstream USB port typically found in computers and

USB hubs. It integrates the series resistors (R1) and the 15 k

W pull−down resistors (R2) for both USB data lines (D+ and D−)

as well as the capacitors to ground for EMI suppression. Zener diodes provide ESD protection up to 15 kV contact discharge

per the IEC 61000−4−2 standard and protect the USB controller on both data lines. The 6−lead PACUSBVB−D1 device

provides an additional zener diode to protect the VBUS USB power line.

The PACUSBVB−D1 should be placed on the PCB between the USB controller and the USB connector, as shown on the

Connection Diagram, Figure 3.

Figure 3. Connection Diagram for PACUSBVB−D1

1

2

4

6

R1

3

Downstream

USB

Connector

R2

C1

D+

R2

C1

R1

D−

USB

Controller

D+

D−

PACUSBVB−DnY6R

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To guarantee the best ESD and filtering performance, it is recommended that the PACUSBVB−D1 be located close to the

USB connector. Also, the trace lengths between the PACUSBVB−D1 and the USB controller should be kept as short as

possible.