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PDF SMDA24CTB Data sheet ( Hoja de datos )
| Número de pieza | SMDA24CTB | |
| Descripción | Bidirectional TVS Array for Protection of Four Lines | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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SMDA05C THRU SMDA24C
Bidirectional TVS Array
for Protection of Four Lines
PROTECTION PRODUCTS
Description
The SMDAxxC series of TVS arrays are designed to
provide bidirectional protection for sensitive electronics
from damage or latch-up due to ESD, lightning and
other voltage-induced transient events. Each device
will protect four data or I/O lines. They are available
with operating voltages of 5V, 12V, 15V and 24V.
TVS diodes are solid-state devices designed specifically
for transient suppression. They offer desirable charac-
teristics for board level protection including fast re-
sponse time, low operating and clamping voltage and
no device degradation. The low profile SO-8 package
allows the user to protect up to four independent lines
with one package. The SMDAxxC series is suitable
protection for sensitive semiconductors components
such as microprocessors, ASICs, transceivers, trans-
ducers, and CMOS memory.
Features
u Transient protection for data lines to
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 12A (8/20µs)
u Bidirectional protection
u Small SO-8 package
u Protects four I/O lines
u Working voltages: 5V, 12V, 15V and 24V
u Low leakage current
u Low operating and clamping voltages
u Solid-state silicon avalanche technology
Mechanical Characteristics
u JEDEC SO-8 package
u Molding compound flammability rating: UL 94V-0
u Marking : Part number, date code, logo
u Packaging : Tube or Tape and Reel per EIA 481
The SMDAxxC series devices may be used to meet the
ESD immunity requirements of IEC 61000-4-2, level 4
for air and contact discharge.
Applications
u Data and I/O Lines
u Microprocessor based equipment
u Notebooks, Desktops, and Servers
u Instrumentation
u LAN/WAN equipment
u Peripherals
u Serial and Parallel Ports
Schematic & PIN Configuration
Revision 9/2000
18
27
36
45
SO-8 (Top View)
1 www.semtech.com
1 page  
PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Four Data Lines
The SMDAxxC series devices are designed to protect
up to four data lines. The devices are connected as
follows:
l The SMDAxxC are bidirectional devices and are
designed for use on lines where the normal operat-
ing voltage is above and below ground. Pins 1, 2,
3, and 4 are connected to the protected lines.
Pins 5, 6, 7, and 8 are connected to ground. Since
the device is electrically symmetrical, these connec-
tions may be reversed. The ground connections
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 induc-
tance in the board traces.
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.
SMDA05C THRU SMDA24C
Circuit Diagram
18
27
36
45
I/O Line Protection
Typical Connection
To Protected
Device
18
27
Ground
36
45
From Connector
ã 2000 Semtech Corp.
5
www.semtech.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SMDA24CTB.PDF ] | |
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