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LCDA12C-8 Datasheet(PDF) 4 Page - Semtech Corporation

Part No. LCDA12C-8
Description  Low Capacitance TVS Diode Array For Multi-mode Transceiver Protection
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

LCDA12C-8 Datasheet(HTML) 4 Page - Semtech Corporation

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ã 2000 Semtech Corp.
LCDA12C-8 & LCDA15C-8
Device Connection Options for Protection of Eight
High-Speed Data Lines
The LCDAxxC-8 may be configured to protect up to
eight I/O lines operating between 5 and 15V. It may be
used to protect the most popular serial data interface
standard lines making it ideal for use in equipment
utilizing multi-mode transceivers. The LCDAxxC-8 is
symmetrical so the data lines may be connected at
pins 1-8 or 9-16. Pins 9-16 or 1-8 are connected to
ground as shown. For best results, these pins should
be connected directly to a ground plane on the board.
The path length should be kept as short as possible to
minimize parasitic inductance.
Multi-Mode Transceiver Protection
The LCDAxxC-8 may be used to protect multi-mode
transceiver I/O lines with external connections. The
LCDAxxC-8 adds a maximum loading capacitance of
15pF with a working voltage of 12V or 15V. This allows
the transceiver to safely operate in all modes without
clipping or degradation of the signal.
With proper design and layout, the transceiver port can
be protected to >15kV (HBM per IEC 61000-4-2).
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of fast rise-time transients such as ESD. The following
guidelines are recommended:
Place the LCDAxxC-8 near the input terminals or
connectors to restrict transient coupling.
Minimize the path length between the LCDAxxC-8
and the protected line.
Minimize all conductive loops including power and
ground loops.
The ESD transient return path to ground should be
kept as short as possible.
Never run critical signals near board edges.
Use ground planes whenever possible.
Device Connection
Applications Information

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