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05076.R10 9/12

Page 6

PLCDA03 - PLCDA24

APPLICATION INFORMATION

FIGURE 1 - BIDIRECTIONAL COMMON-MODE USB PROTECTION

Circuit connectivity is as follows:

• Pins 1, 2, 3 and 4 connected to ground.

• Pins 5 and 6 connected to I/O Line D+.

• Pins 7 and 8 connected to I/O Line D-.

CIRCUIT BOARD RECOMMENDATIONS

Circuit board layout is critical for electromagnetic compatibility protection. The following guidelines are recommended:

• The protection device should be placed near the input terminals or connectors, the device will divert the transient current

immediately before it can be coupled into the nearby traces.

• The path length between the TVS device and the protected line should be minimized.

• All conductive loops including power and ground loops should be minimized.

• The transient current return path to ground should be kept as short as possible to reduce parasitic inductance.

• Ground planes should be used whenever possible. For multilayer PCBs, use ground vias.

1

2

4

8

3

5

6

7

D+

D-

GND