深圳市福田区星河源电子展销柜 （非本站正式会员）

C. Applications 
 
1. Universal Serial Bus (USB) ESD Protection 
 
The AZC002-02N can be used to protect the 
USB  port  on  the  monitors,  computers, 
peripherals  or  portable  systems.  The  ESD 
protection scheme for single USB ports is shown 
in Fig. 3. In the Fig.3, the voltage bus (VBUS) of 
USB port is connected to the power pin (pin 4) of 
AZC002-02N. Each data line (D+/D-) of USB port 

is connected to the ESD protection pin (pin2/pin3) 

of AZC002-02N. 
When ESD voltage pulse appears on the data 
line, the ESD pulse current will be conducted by 
AZC002-02N away from the USB controller chip. 
In addition, the ESD pulse current also can be 
conducted by AZC002-02N away from the USB 
controller  chip  when  the  ESD  voltage  pulse 
appears on the voltage bus (VBUS) of USB port. 
Therefore, the data lines (D+/D-) and voltage bus 
(VBUS)  of  two  USB  ports  are  complementally 
protected with an AZC002-02N.