SLVDA28 Datasheet, PDF (4/6 Pages) Semtech Corporation –

SLVDA2.8 LOW VOTAGE TVS DIODE ARRAY FOR ESD & LATCH-UP PROTECTION

SLVDA2.8
PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Four Data Lines
The SLVDA series devices are designed to protect up to
four data lines. The devices are connected as follows:
l Common mode protection of four data lines is
achieved by connecting data lines at pins 1 - 4.
Pins 5 - 8 are connected to ground (Device is
symmetrical so connections may be reversed to
serve a specific application). The ground connec-
tions should be made directly to the ground plane
for best results. The path length is kept as short
as possible to reduce the effects of parasitic
inductance in the board traces.
l Protecting 5V lines: The designer may take advan-
tage of the superior reverse leakage and capaci-
tance characteristics of the SLVDA2.8 to protect
two 5V lines. This is achieved by connecting two
lines of the device in series as shown. The series
connection is made by shorting pins 5 & 6 together
for the first line and pins 7 & 8 for the second line.
Pins 1 & 4 are connected to the lines that are to
be protected. Pins 2 & 3 are connected to ground.
See application note SI96-14 for additional details.
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
l Place the TVS near the input terminals or connec-
tors to restrict transient coupling.
l Minimize the path length between the TVS and the
protected line.
l Minimize all conductive loops including power and
ground loops.
l The ESD transient return path to ground should be
kept as short as possible.
l Never run critical signals near board edges.
l Use ground planes whenever possible.
LINE 1
LINE 2
LINE 3
LINE 4
I/O Line Protection
Typical Connection
To Protected
Device
1
8
2
7
Ground
3
6
4
5
From Connector
Optional Connection for Protecting 5V Lines
ã 2000 Semtech Corp.
4
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