PACUSBVBD1/D2/D3

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Application Information

The PACUSBVB-D1/D2/D3 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 15kW 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 15kV contact discharge per the IEC 61000-4-2 standard and protect the USB controller on both

data lines. The 6-lead PACUSBVB-D1/D2/D3 device provides an additional zener diode to protect the VBUS

USB power line.

The PACUSBVB-D1/D2/D3 should be placed on the PCB between the USB controller and the USB connector,

Figure 5.

Connection Diagram for PACUSBVB-D1/D2/D3

To guarantee the best ESD and filtering performance, it is recommended that the PACUSBVB-D1/D2/D3 be

located close to the USB connector. Also, the trace lengths between the PACUSBVB-D1/D2/D3 and the USB

controller should be kept as short as possible.