Datasheet

VBUS054B-HSF
www.vishay.com
Vishay Semiconductors
Rev. 1.9, 04-Jan-2019
4
Document Number: 81624
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THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Fig. 9 - Typical Peak Clamping Voltage at ESD
Contact Discharge (acc. IEC 61000-4-2)
Fig. 10 - Typical Peak Clamping Voltage at ESD
Contact Discharge (acc. IEC 61000-4-2)
APPLICATION NOTE
With the VBUS054B-HSF a double, high speed USB-port or up to 4 other high speed signal or data lines can be protected
against transient voltage signals. Negative transients will be clamped close below the ground level while positive transients will
be clamped close above the 5 V working range. An avalanche diode clamps the supply line (V
BUS
at pin 5) to ground (pin 2). The
high speed data lines, D
1+
, D
2+
, D
1-
and D
2-
, are connected to pin 1, 3, 4 and 6. As long as the signal voltage on the data lines
is between the ground- and the V
BUS
-level, the low capacitance PN-diodes offer a very high isolation to V
BUS
, ground and to
the other data lines. But as soon as any transient signal exceeds this working range, one of the PN-diodes starts working in the
forward mode and clamps the transient to ground or to the avalanche breakthrough voltage level of the Z-diode between pin 5
and pin 2.
- 250
- 200
- 150
- 100
- 50
0
50
100
150
200
0 5 10 15 20
V
ESD
(kV)
V
C-ESD
(V)
acc. IEC 61000-4-2
contact discharge
V
C-ESD
Pin 1, 3, 4 or 6 to Pin 2
Pin 2 to Pin 1, 3, 4 or 6
20555
- 80
- 60
- 40
- 20
0
20
40
60
80
100
120
140
0 5 10 15 20
V
ESD
(kV)
V
C-ESD
(V)
acc. IEC 61000-4-2
contact discharge
V
C-ESD
Pin 5 to Pin 2
Pin 2 to Pin 5
20556
R
E
C
E
I
V
E
R
IC
20399
6
4
5
1
2
3
t
i
w
n
U
S
B
-
P
o
r
t
V
BUS
D
1+
D
1-
D
2+
D
2-
G
ND