PACUSBVB Datasheet, PDF (5/7 Pages) ON Semiconductor – USB Downstream Port Terminator with VBUS ESD Protection

PACUSBVB
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 kW 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.
D+
USB
Controller
PACUSBVB−DnY6R
R1
1
C1
R2
2
C1
R2
6
D+
Downstream
USB
Connector
5
V_BUS
D−
3
4
D−
R1
Figure 3. Connection Diagram for PACUSBVB−D1
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.
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