PROTECTION PRODUCTS - RailClamp
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 trans-
mission lines from overvoltage caused by
ESD
(electro-
static discharge),
CDE
(cable discharge events),
EFT
(electrical fast transients), and
lightning.
The unique design of these devices incorporates 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
0508M has a low typical capacitance of
3pF and may be used on lines operating up to 1GHz.
This makes the device ideal for protection of high-
speed data lines such as USB 2.0, Firewire, DVI, and
gigabit Ethernet interfaces.
The low capacitance array configuration allows the user
to protect eight 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
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) 12A (8/20µs)
Array of surge rated diodes with internal TVS
Small package saves board space
Protects eight I/O lines operating up to 1GHz
Low capacitance:
3pF
typical
Low clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
RClamp0508M
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
USB 2.0 Power & Data Line Protection
Video Graphics Cards
Monitors and Flat Panel Displays
Digital Video Interface (DVI)
High Definition Multi-Media Interface (HDMI)
10/100/1000 Ethernet
ATM Interfaces
IEEE 1394 Firewire Ports
Circuit Diagram
PIN Configuration
3
Line 1
1
Line 2
1
2
4
5
7
8
9
10
Line 8
Line 7
Line 6
Line 5
GND
Vcc
Line 3
Line 4
6
MSOP-10L (Top View)
Revision 01/18/2008
1
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
