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PDF RCLAMP1502B Data sheet ( Hoja de datos )

Número de pieza RCLAMP1502B
Descripción Ultra-Low Capacitance TVS
Fabricantes Semtech Corporation 
Logotipo Semtech Corporation Logotipo



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No Preview Available ! RCLAMP1502B Hoja de datos, Descripción, Manual

RClamp1502B
Ultra-Low Capacitance TVS
for ESD and CDE Protection
PROwwTwE.DCaTtaISOheNet4UP.cRomODUCTS - 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 RClampTM1502B has a typical capacitance of only
0.60pF (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
Automatic Test Equipment and Infiniband circuits.
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: 15.0V
‹ 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: P6
‹ Packaging: Tape and Reel
Applications
‹ Automatic Test Equipment
‹ Firewire Ports
‹ GaAs Photodetector Protection
‹ HBT Power Amp Protection
‹ Infiniband Transceiver Protection
Dimensions
1.60
3
0.50 BSC
0.80 1.60
12
1.00
BSC
0.75
Nominal Dimensions (mm)
Revision 4/27/2007
Schematic & PIN Configuration
SC-75 3L (Top View)
1 www.semtech.com

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RCLAMP1502B pdf
PROTECTION PRODUCTS
Appwlwiwc.aDattiaoSnheset4IUn.cfoomrmation
Device Connection Options
This device is optimized for protection of 1 line
operating in excess of 3GHz. It may also be used to
protect two lines, but it is recommended it not be used
much beyond 1GHz due to cross talk limitations. The
device is connected as follows:
One data line can be connected to either pin 1 or pin 2
with the other connected to ground. The connection to
ground should be made directly to a ground plane. The
path length should also be kept as short as possible to
minimize parasitic inductance. Pin 3 is not connected.
Protection of two lines is achieved by connecting data
lines at pins 1 & 2. Pin 3 is connected to ground. The
connection to ground should be made directly to a
ground plane. The path length should also be kept as
short as possible to minimize parasitic inductance.
Matte Tin Lead Finish
Matte tin has become the industry standard lead-free
replacement for SnPb lead finishes. A matte tin finish
is composed of 100% tin solder with large grains.
Since the solder volume on the leads is small com-
pared to the solder paste volume that is placed on the
land pattern of the PCB, the reflow profile will be
determined by the requirements of the solder paste.
Therefore, these devices are compatible with both
lead-free and SnPb assembly techniques. In addition,
unlike other lead-free compositions, matte tin does not
have any added alloys that can cause degradation of
the solder joint.
RClamp1502B
Figure 1. Pin Configuration
© 2007 Semtech Corp.
5
www.semtech.com

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