STF203-22

The available resistor values for the series resistors in the STF203 device are 15 Ω (STF203-15), 22 Ω (STF203-22), and 33 Ω (STF203-33).

The TVS diodes in the STF203 device provide ESD protection for both the USB data lines (D+ and D-) and the voltage bus (V BUS). They are designed to suppress ESD voltages in excess of ±15kV (air discharge) and ±8kV (contact discharge) per IEC 61000-4-2, level 4. Additionally, the TVS diode on the V BUS pin is capable of suppressing ESD discharges in excess of 25kV per IEC 61000-4-2.

The purpose of the STF203 device described in the PDF is to provide termination, EMI filtering, and ESD protection for one USB port. It is designed to be connected to either full-speed devices or low-speed devices, with specific pin connections for each type of device. The device integrates passive components, TVS diodes, and line termination resistors to meet the requirements of the Universal Serial Bus specification revision 1.1. The STF203 is an easily implemented solution that simplifies design and requires minimal board space.