SR3.3 Semtech Corporation, SR3.3 Datasheet

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SR3.3

Manufacturer Part Number
SR3.3
Description
RailClamp Low Capacitance TVS Diode Array
Manufacturer
Semtech Corporation
Datasheet

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RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SR 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
tertiary lightning.
The unique design of the SR series devices incorpo-
rates four surge rated, low capacitance steering diodes
and a TVS diode in a single package. The TVS diode is
constructed using Semtech’s proprietary low voltage
EPD technology for superior electrical characteristics at
3.3 volts.
the transient to either the positive side of the power
supply line or to ground. The internal TVS diode pre-
vents over-voltage on the power line, protecting any
downstream components.
The low capacitance array configuration allows the user
to protect two high-speed data or transmission lines.
The low inductance construction minimizes voltage
overshoot during high current surges.
Revision 03/21/03
PROTECTION PRODUCTS
During transient conditions, the steering diodes direct
Description
Circuit Diagram
Pin 2
Pin 4
Pin 1
Pin 3
1
Features
Mechanical Characteristics
Applications
Low Capacitance TVS Diode Array
Schematic & PIN Configuration
ESD protection to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Array of surge rated diodes with internal
EPD TVS
Protects two I/O lines
Low capacitance (<10pF) for high-speed interfaces
Low leakage current (< 1µA)
Low operating voltage: 3.3V
Solid-state technology
JEDEC SOT-143 package
Molding compound flammability rating: UL 94V-0
Marking : R3.3
Packaging : Tape and Reel per EIA 481
Data and I/O lines
Sensitive Analog Inputs
Video Line Protection
Portable Electronics
Microcontroller Input Protection
WAN/LAN Equipment
diode
1
2
SOT-143 (Top View)
4
3
RailClamp
www.semtech.com
SR3.3

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SR3.3 Summary of contents

Page 1

... Molding compound flammability rating: UL 94V-0 Marking : R3.3 Packaging : Tape and Reel per EIA 481 Applications Data and I/O lines Sensitive Analog Inputs Video Line Protection Portable Electronics Microcontroller Input Protection WAN/LAN Equipment Schematic & PIN Configuration 1 2 SOT-143 (Top View) 1 SR3.3 RailClamp 4 3 www.semtech.com ...

Page 2

... PROTECTION PRODUCTS Absolute Maximum Rating µ µ Electrical Characteristics 2003 Semtech Corp µ µ ° µ µ www.semtech.com SR3 ° C ° C ° µ ...

Page 3

... Forward Current - I 2003 Semtech Corp. 110 100 100 1000 Clamping Voltage vs. Peak Pulse Current 16 Waveform Parameters Waveform Parameters 8µ 20µ ( SR3.3 Power Derating Curve 100 125 o Ambient Temperature - Line-To-Line Line-To-Ground Waveform Parameters 8µ 20µ Peak Pulse Current - I (A) PP www.semtech.com 150 12 ...

Page 4

... High-Speed Data Lines o High-Speed Data Lines o High-Speed Data Lines o High-Speed Data Lines The SR3.3 TVS is designed to protect two data lines from transient over-voltages by clamping them to a fixed reference. When the voltage on the protected line exceeds the reference voltage (plus diode V steering diodes are forward biased, conducting the transient current away from the sensitive circuitry ...

Page 5

... However, by utilizing the EPD technology, the SR3.3 can effectively operate at 3.3V while main- taining excellent electrical characteristics. The EPD TVS employs a complex nppn structure in contrast to the pn structure normally found in tradi- tional silicon-avalanche TVS diodes ...

Page 6

... PROTECTION PRODUCTS Outline Drawing - SOT-143 Notes: (1) Controlling dimension: Inch (unless otherwise specified). (2) Dimension A and B do not include mold protrusions. Mold protrusions are .006” max. Land Pattern - SOT-143 2003 Semtech Corp. 6 SR3.3 www.semtech.com ...

Page 7

... PROTECTION PRODUCTS Marking Codes Ordering Information Contact Information Phone: (805)498-2111 FAX (805)498-3804 2003 Semtech Corp Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 7 SR3.3 www.semtech.com ...

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