Ultra-Low Capacitance TVS
for ESD and CDE Protection
PROTECTION PRODUCTS - RailClamp
Description
RailClamps are ultra low capacitance TVS arrays
designed to protect high speed data interfaces. This
series has been specifically designed to protect sensi-
tive components which are connected to high-speed
data and transmission lines from overvoltage caused
by
ESD
(electrostatic discharge),
CDE
(Cable Discharge
Events), and
EFT
(electrical fast transients).
The RClamp
TM
0502B has a typical capacitance of only
0.50pF (pin 1 to 2). This means it can be used on
circuits operating in excess of 3GHz without signal
attenuation. They may be used to meet the ESD
immunity requirements of IEC 61000-4-2, Level 4
(±15kV air, ±8kV contact discharge). Each device can
be configured to protect 1 bidirectional line or two
unidirectional lines.
These devices are in a small SC-75 (SOT-523) package
and feature a lead-free, matte tin finish. They are com-
patible with both lead free and SnPb assembly tech-
niques. They are designed for use in applications where
board space is at a premium. The combination of small
size, low capacitance, and high level of ESD protection
makes them a flexible solution for applications such as
HDMI, MDDI, antenna circuits, Automatic Test Equipment,
USB 2.0, and Infiniband circuits.
RClamp0502B
Features
Transient protection for high-speed data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Designed to replace polymer TVS
Protects up to two I/O lines
Ultra-Low capacitance
(<1pF)
No insertion loss to >3.0GHz
Low profile (<1mm)
Low leakage current and clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
Mechanical Characteristics
SC-75 (SOT-523) package
Lead Finish: Matte Tin
RoHS/WEEE Compliant
Molding compound flammability rating: UL 94V-0
Marking: P5
Packaging: Tape and Reel per EIA 481
Applications
High-Definition Multimedia Interface (HDMI)
Mobile Display Digital Interface (MDDI)
RF/Antenna Circuits
USB 2.0 & Firewire Ports
GaAs Photodetector Protection
HBT Power Amp Protection
Infiniband Transceiver Protection
Dimensions
1.60
0.50 BSC
Schematic & PIN Configuration
3
1.60
0.80
1
1.00
BSC
2
0.75
Nominal Dimensions (mm)
Revision 04/05/2005
1
SC-75 3L (Top View)
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