FEATURES

Qualified for Automotive Applications

Design to Protect Submicron 3-V or 5-V

Circuits from Noise Transients

Port ESD Protection Capability Exceeds:

− 15-kV Human Body Model

− 2-kV Machine Model

Available in a WCSP Chip-Scale Package

Stand-Off Voltage . . . 6 V Min

Low Current Leakage . . . 1 μA Max at 6 V

Low Capacitance . . . 35 pF Typ

APPLICATIONS

USB 1.1 Host, Hub, or Peripheral Ports

DESCRIPTION

The SN65220 is a single transient voltage suppressor

designed to provide electrical noise transient protection to

universal serial bus (USB) 1.1 ports. Note that the input

capacitance of the device makes it unsuitable for

high-speed USB 2.0 applications.

Any cabled I/O can be subjected to electrical noise

transients from various sources. These noise transients

can cause damage to the USB transceiver and/or the USB

ASIC if they are of sufficient magnitude and duration.

USB ports are typically implemented in 3-V or 5-V digital

CMOS with limited ESD protection. The SN65220 can

significantly increase the port ESD protection level and

reduce the risk of damage to the circuits of the USB port.

The IEC1000-4-2 ESD performance of the SN65220 is

measured at the system level. Therefore, system design

impacts the results of these tests. A high compliance level

may be attained with proper board design and layout.