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PDF SMDA05 Data sheet ( Hoja de datos )
| Número de pieza | SMDA05 | |
| Descripción | Unidirectional TVS Array for Protection of Four Lines | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SMDA05 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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SMDA05 THRU SMDA24
Unidirectional TVS Array
for Protection of Four Lines
PROTECTION PRODUCTS
Description
The SMDAxx series of TVS arrays are designed to provide
undirectional 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 SMDAxx series is suitable protection for
sensitive semiconductors components such as micropro-
cessors, ASICs, transceivers, transducers, 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 Undirectional 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 SMDAxx 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 RS-232 data lines
u Microprocessor based equipment
u Notebooks, Desktops, & 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 SMDAxx series devices are designed to protect up to
four data lines. The devices are connected as follows:
l The SMDAxx are unidirectional devices and are
designed for use on lines where the normal operat-
ing voltage is above ground. Pins 1, 2, 3, and 4 are
connected to the protected lines. Pins 5, 6, 7, and 8
are connected to ground. 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 inductance 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 connectors
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.
ã 2000 Semtech Corp.
5
SMDA05 THRU SMDA24
Circuit Diagram
18
27
36
45
I/O Line Protection
Typical Connection
To Protected
Device
18
27
Ground
36
45
From Connector
www.semtech.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SMDA05.PDF ] | |
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