Description
In order to prevent fast transients from leading to severe damages in a high speed data system, a specific protection has been developed by STMicroelectronics.
The USB6B1 protects the two input lines against overvoltage. Besides, this device also keeps the power rails in a safe limit thanks to the integrated Transil diode.

FEATUREs
■ Full diode bridge with integrated clamping protection
■ Breakdown voltage: VBR = 6 V min.
■ Peak pulse power dissipation: PPP = 500 W (8/20 µs)
■ Very low capacitance, compatible with high debit data or signal rates.

APPLICATIONs
Where transient overvoltage protection in sensitive equipment is required, such as:
■ Universal Serial Bus ports
■ RS-423 interfaces
■ RS-485 interfaces
■ ISDN equipment
■ T1/E1 line cards
■ HDSL / ASDL interfaces

Benefits
■ Provides protection for each line and between the supply voltage and GND: 25 A, 8/20 µs.
■ High ESD protection level: up to level 3 per MIL STD 883C-Method 3015-6
■ Separated inputs and outputs (so-called 4-point structure) to improve ESD susceptibility.
■ Comprehensive package pin-out for immediate implementation.