VBUS54GD-FBL

www.vishay.com

Vishay Semiconductors

Rev. 1.2, 03-May-17

2

Document Number: 85916

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

APPLICATION NOTE

The VBUS54GD-FBL is a four-line ESD protection device with the characteristic of a Z-diode with a high ESD immunity and a

very low capacitance which makes it usable for high frequency applications like USB2.0, USB3.0 or HDMI.



With the VBUS54GD-FBL four high speed data lines can be protected against transient voltage signals like ESD (electro static

discharge). Connected to the data line (pin 1, 2 and pin 4, 5) and to ground (pin 3 and 8) negative transients will be clamped

close below the ground level while positive transients will be clamped close above the 5.5 V working range. The clamping

behavior of the VBUS54GD-FBL is bidirectional but asymmetrical (BiAs) and so it offers the best protection for applications

running up to 5.5 V.

Pin configuration:

• Pin 3 and 8 are internally shorted and have to be connected to ground

• Pin 6, 7 and 9, 10 are not connected internally

FLOW THROUGH DESIGN

Modern digital transmission lines can be clocked up to 480 Mbit/s (USB2.0) or 1.65 Gbit/s (HDMI).



At such high data rates the transmission lines like cables or the line traces on the PCBs have to be very homogeneous regarding

their surge impedance. This requires well defined trace dimensions as trace width and distance which have to be calculated

depending on the requested surge impedance (e.g. 50

) and the PCB material and layer dimensions. Any device connected

to the data lines - like ESD protection devices - have to be connected with minimal changes in these trace dimensions and

distances.



With the package in the so called “Flow Through Design” this is possible. The lines are running straight along the PCB while the

VBUS54GD-FBL is placed on top without any via or loops.

ELECTRICAL CHARACTERISTICS VBUS54GD-FBL (PIN 1, 2, 4 OR 5 TO PIN 3)



PARAMETER

TEST CONDITIONS/REMARKS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Protection paths

Number of lines which can be protected

-

-

4

lines

Reverse stand-off voltage

Max. reverse working voltage

--

5.5

V

Reverse voltage

5.5

-

-

V

Reverse current

-

0.02

0.1

μA

Reverse breakdown voltage

6.9

7.5

8.7

V

Reverse clamping voltage

-9.1

11

V

-12

15

V

Forward clamping voltage

-2.1

2.4

V

-3.5

4.5

V

Clamping voltage

-15-

V

-21-

V

Dynamic resistance

-0.76

-



Capacitance

-0.6

0.75

pF

-

0.65

0.75

pF

Capacitance between I/O lines

-0.3

0.4

pF

nc.

GND

GND D2+

123

4

5

98

76

nc.

nc.

nc.

D2-

D1+ D1-

22552

10

123

4

5

10

9

8

7

6

USB / HDMI Interface

D2+

D2-

D1+

D1-

GND

D2+

D2-

D1+

D1-

I/O Port Connector

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22553