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PDF SMS12TC Data sheet ( Hoja de datos )
| Número de pieza | SMS12TC | |
| Descripción | TVS Diode Array For ESD and Latch-Up Protection | |
| Fabricantes | Semtech Corporation | |
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Hay una vista previa y un enlace de descarga de SMS12TC (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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PROTECTION PRODUCTS
Description
The SMS series of TVS arrays are designed to protect
sensitive electronics from damage or latch-up due to
ESD and other voltage-induced transient events. Each
device will protect up to four lines. They are available
with operating voltages of 5V, 12V, 15V and 24V. They
are unidirectional devices and may be used on lines
where the signal polarities are above ground.
TVS diodes are solid-state devices designed specifically
for transient suppression. They feature large cross-
sectional area junctions for conducting high transient
currents. They offer desirable characteristics for board
level protection including fast response time, low
operating and clamping voltage and no device degrada-
tion.
The SMS series devices may be used to meet the
immunity requirements of IEC 61000-4-2, level 4. The
low cost SOT23-6L package makes them ideal for use
in portable electronics such as cell phones, PDAs, and
notebook computers.
SMS05 THRU SMS24
TVS Diode Array
For ESD and Latch-Up Protection
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) 24A (8/20µs)
u Small package for use in portable electronics
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 EIAJ SOT23-6L package
u Molding compound flammability rating: UL 94V-0
u Marking : Marking Code
u Packaging : Tape and Reel per EIA 481
Applications
u Cell phone Handsets and Accessories
u Microprocessor Based Equipment
u Personal Digital Assistants (PDAs) and Pagers
u Desktops PC and Servers
u Notebook, Laptop, and Palmtop Computers
u Portable Instrumentation
u Peripherals
u MP3 Players
u Cordless Phones
Circuit Diagram
Schematic & PIN Configuration
Revision 9/2000
SOT23-6L (Top View)
1 www.semtech.com
1 page  
PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Four Data Lines
The SMSxx is designed to protect up to four unidirec-
tional data lines. The device is connected as follows:
1. Unidirectional protection of four I/O lines is
achieved by connecting pins 1, 3, 4 and 6 to the
data lines. Pin 2 and 5 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 SMSxx near the input terminals or con-
nectors to restrict transient coupling.
l Minimize the path length between the SMSxx 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.
SMS05 THRU SMS24
SMSxx Circuit Diagram
Protection of Four Unidirectional Lines
ã 2000 Semtech Corp.
5
www.semtech.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SMS12TC.PDF ] | |
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