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USB6Bx

®

DATA LINES PROTECTION

August 1999 Ed : 5A

Application Specific Discretes

A.S.D.

SO8

DIL8

FUNCTIONAL DIAGRAM

Vcc

Vcc

I/01

I/01

I/02

I/02

GND

GND

MIL STD 883C - Method 3015-6

class 3

C = 100 pF

R = 1500

Ω

3 positive strikes and 3 negative strikes (F=1Hz)

IEC-1000-4-2 level 4

15 kV

(air discharge)

8 kV

(contact discharge)

COMPLIES WITH THE FOLLOWING STANDARDS:

TM: ASD and TRANSIL are trademarks of ST Microelectronics.

Where transient overvoltage protection in sensi-

tive equipment is required, such as:

- Universal Serial Bus ports

- RS-423 interfaces

- RS-485 interfaces

- ISDN equipment

- T1/E1 line cards

- HDSL / ASDL interfaces

APPLICATIONS

n

Full diode bridge with integrated clamping protection

n

Breakdown voltage : VBR = 6V min.

n

µs)

n

Very low capacitance, compatible with high debit

data or signal rates.

FEATURES

In order to prevent fast transients from leading

to severe damages in a high speed data sys-

tem, a specific protection has been developed

by STMicroelectronics.

The USB6Bx 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.

DESCRIPTION

n

Provides protection for each line and between

the supply voltage and GND : 25A , 8/20

µs.

n

High ESD protection level : up to level 3 per

MIL STD 883C-Method 3015-6

n

Separated inputs and outputs (so-called 4-point

structure) to improve ESD susceptibility.

n

Comprehensive package pin-out for immediate

implementation.

BENEFITS