PACUSB-D2 datasheet(7/9 Pages) CALMIRCO

7 / 9 page

09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

▲ Tel: 408.263.3214

▲ Fax: 408.263.7846

▲ www.calmicro.com

PACUSB-D1/D2/D3

Application Information

The PACUSB-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 15k

Ω 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 dis-

charge per the IEC 61000-4-2 standard and protect the

USB controller on both data lines.

The PACUSB-D1/D2/D3 should be placed on the PCB

between the USB controller and the USB connector, as

shown on the Connection Diagram Figure 5.

Figure 5. Connection Diagram for PACUSB-D1/D2/D3 Devices

To guarantee the best ESD and filtering performance,

it is recommended to physically locate the PACUSB-

D1/D2/D3 close to the USB connector. Also, the trace

lengths between the PACUSB-D1/D2/D3 and the USB

controller should be kept as short as possible.

DOWN-

USB

CONTROLLER

PACUSB-DnY5/Y5R, -DnYB5/YB5R

D+

D-

D+

D-

STREAM

CONNECTOR

PACUSB-D2 bảng dữ liệu(PDF) 7 Page - California Micro Devices Corp