PSRDA3.3-4_10 Datasheet, PDF (6/9 Pages) Protek Devices – 500 WATT LOW CAPACITANCE STEERING DIODE/TVS ARRAY

Only One Name Means ProTek’Tion™
application information
PSRDA3.3-4 - PSRDA15-4
USB Port V
BUS
D+
D-
V
BUS
GND
4
3
2
1
5
6
GND
7
8
USB Port _V
BUS
GND
D+
D-
GND
figure 1 - differential mode usb protection
Circuit connectivity is as follows:
• Pins 1, 2, 4, 6 and 7 connected to the datalines.
• Pin 5 and 8 connected to ground.
• Pins 2 and 3 connected to the databus.
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.
05096.R10 11/10
Page 6
www.protekdevices.com