Only One Name Means ProTek’Tion™

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05018.R8 11/10

Page 6

LCD05C - LCD24C

aPPLiCation inFoRmation

2

1

16

15

D+

D-

Port 1

USB Output

Connector

5

6

12

11

D+

D-

Port 3

USB Output

Connector

3

4

13

14

D+

D-

Port 2

USB Output

Connector

7

8

9

10

D+

D-

Port 4

USB Output

Connector

USB

IC

FiguRe 1 - Common-moDe usB PRoteCtion

Circuit connectivity is as follows:

• Pins 1, 2, 3, 4, 5, 6, 7 and 8 connected to ground.

• Pins 16 and 15 connected to Port 1, D- and D+.

• Pins 14 and 13 connected to Port 2, D- and D+.

• Pins 12 and 11 connected to Port 3, D- and D+.

• Pins 10 and 9 connected to Port 4, D- and 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.