PROTECTION PRODUCTS
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The RClamp series
has been specifically designed to protect sensitive
components which are connected to data and transmis-
sion lines from overvoltage caused by
ESD
(electrostatic
discharge),
EFT
(electrical fast transients), and
lightning.
The unique design of the RClamp series devices incorpo-
rates four 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
TM
0504M has a low typical capacitance of
3pF and operates with virtually no insertion loss to
1GHz. This makes the device ideal for protection of high-
speed data lines such as USB 2.0, Firewire, and DVI
interfaces.
The RClamp0504M is designed to have ease of layout by
allowing the traces to run straight through the device.
This ease of layout coupled with the low capacitance and
clamping voltage of the RClamp0504M makes it the
superior choice for protecting four high speed lines.
The low capacitance array configuration allows the user
to protect four high-speed data or transmission lines.
The low inductance construction minimizes voltage
overshoot during high current surges. They may be used
to meet the ESD immunity requirements of IEC 61000-4-
2, Level 4 (15kV air, 8kV contact discharge).
RailClamp
Low Capacitance TVS Diode Array
PRELIMINARY
Features
ESD protection for high-speed data lines to
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-5 (Lightning) 12A (8/20µs)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Array of surge rated diodes with internal TVS Diode
Small package saves board space
Protects four I/O lines and one Vcc line
Low capacitance:
3pF
typical
Low clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
RClamp0504M
Mechanical Characteristics
JEDEC MSOP 10L package
Molding compound flammability rating: UL 94V-0
Marking : Marking code and date code
Packaging : Tape and Reel per EIA 481
Lead Finish: Matte Tin
Applications
Digital Video Interface (DVI)
10/100/1000 Ethernet
Monitors and Flat Panel Displays
Notebook Computers
High Definition Multi-Media Interface (HDMI)
USB 2.0 Power & Data Line Protection
IEEE 1394 Firewire Ports
Projection TV
Circuit Diagram
Schematic & PIN Configuration
Pin 3
Line 1
1
NC
Pin 1
Pin 4
Pin 6
Pin 9
NC
Line 2
GND
NC
Line 4
Vcc
Line 3
NC
Pin 8
MSOP-10L (Top View)
Revision 08/17/2004
1
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