This document describes the STMicroelectronics USB6B1 product, which is a protector for transient overvoltage protection in sensitive equipment. It is suitable for various interfaces and lines, and features integrated clamping protection and high ESD protection level.
The USB6B1 protects the two USB data lines (D+ and D‑) and the power rails from fast transient over‑voltages. It is intended for applications where ESD protection is required, such as USB ports, RS‑423/RS‑485 interfaces, ISDN equipment, T1/E1 line cards and HDSL/ASDL interfaces.
Key features include a full diode bridge with integrated clamping, a 6 V breakdown voltage, 500 W peak pulse power dissipation (8/20 µs), 25 A surge current capability, and very low capacitance (25 pF) to maintain signal integrity at high data rates. The device is supplied in a compact SO‑8 package and complies with MIL‑STD‑883C, IEC 61000‑4‑2 and Class 3 ESD standards.
| Breakdown voltage (V_ER) | 6 V min. |
|---|---|
| Peak pulse power (P_PP) | 500 W (8/20 µs) |
| Storage temperature range | -55 °C to +150 °C |
| Operating temperature range | -40 °C to +85 °C |
| Leakage current | 10 pA |
| Package | SO‑8 |
A 100 nF capacitor should be placed close to the USB6B1 between VCC and ground.