Devices used to protect USB ports must have the following characteristics :
1. Low capacitance for minimal signal attenuation at the 12Mbs data rate.
2. Extremely fast response time for responding to the sub nanosecond rise time of the ESD pulse.
3. Low clamping and operating voltages for optimum protection of the USB ASIC.
4. Low leakage current for minimal power consumption.
5. Ability to remain undamaged by repetitive ESD strikes.
6. Capacity to handle ESD currents as high as 30A.
7. Minimum package size.
Each USB port consists of four lines. Two lines (D+ &D-) are used for bidirectional data transfer, and two lines are reserved for bus voltage and ground. Both USB power and data line connections are vulnerable to ESD strikes.The XiHang XE6TLC5VU provides an easily implemented,cost effective solution for protecting multiple highspeed lines and the power supply line.
