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PROTECTION PRODUCTS - RailClamp ?
Description
A RailClamp ? is a low capacitance TVS array designed
to protect high speed data interfaces. This series has
been specifically designed to protect sensitive compo-
nents which are connected to data and transmission
lines from overvoltage caused by electrostatic dis-
charge (ESD) , electrical fast transients (EFT) , and
lightning.
The unique design incorporates eight surge rated, low
capacitance steering diodes and a TVS diode in a
single package. During transient conditions, the
steering diodes direct the transient to either the
positive side of the power supply line or to ground. The
internal TVS diode prevents over-voltage on the power
line, protecting any downstream components.
The RClamp ? 0554S is in a 6-lead SOT-23 package.
The leads are finished with lead-free matte tin. Each
device will protect up to four high-speed lines. They
may be used to meet the ESD immunity requirements
of IEC 61000-4-2, Level 4 (15kV air, 8kV contact
discharge). The combination of small size, low capaci-
tance, and high surge capability makes them ideal for
use in applications such as Ethernet, USB 2.0, and
video interfaces.
Circuit Diagram
5
RClamp0554S
RailClamp ?
Low Capacitance TVS Diode Array
Features
ESD protection for high-speed 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) 25A (8/20 μ s)
Array of surge rated diodes with internal TVS Diode
Small package saves board space
Protects four I/O lines and Voltage Bus
Low capacitance: 5pF (VR=0V)
Low clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
Mechanical Characteristics
JEDEC SOT-23 6L package
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Molding compound flammability rating: UL 94V-0
Marking : Marking code + date code
Packaging : Tape and Reel
Applications
USB 2.0 Power and Data Line Protection
10/100/1000 Ethernet
Video Graphics Cards
Monitors and Flat Panel Displays
Digital Video Interface (DVI)
Notebook Computers
IEEE 1394 Firewire Ports
Schematic and PIN Configuration
1
3
4
6
2
SOT-23 6L (Top View)
Revision 3/17/2011
1
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