SRDA3.3-4.T Semtech, SRDA3.3-4.T Datasheet

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SRDA3.3-4.T

Manufacturer Part Number
SRDA3.3-4.T
Description
TRANSIENT SUPPRESSOR DIODE ARRAY,UNIDIRECTIONAL,3.3V V(RWM),SO
Manufacturer
Semtech
Datasheet

Specifications of SRDA3.3-4.T

Rohs Compliant
YES
Lead Free Status / Rohs Status
Compliant

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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
lightning.
The unique design of the SRDA series devices incorpo-
rates 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 compo-
nents.
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.
Revision 8/15/06
PROTECTION PRODUCTS
PROTECTION PRODUCTS - RailClamp
REF1
Description
Circuit Diagram
I/O 1
I/O 2
REF2
I/O 3
I/O 4
1
SRDA3.3-4 through SRDA12-4
Low Capacitance TVS Diode Array
Features
Mechanical Characteristics
Applications
Schematic and PIN Configuration
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)
IEC 61000-4-5 (Lightning) 24A (8/20µs)
Array of surge rated diodes with internal TVS diode
Protects four I/O lines and power supply line
Low capacitance (<15pF) for high-speed interfaces
Low operating and clamping voltages
Solid-state technology
JEDEC SO-8 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code, logo
Packaging : Tube or Tape and Reel per EIA 481
USB Power and Data Line Protection
T1/E1 secondary IC Side Protection
T3/E3 secondary IC Side Protection
HDSL, SDSL secondary IC Side Protection
Video Line Protection
Microcontroller Input Protection
Base stations
I
2
REF 1
REF 1
C Bus Protection
I/O 1
I/O 2
1
2
3
4
S0-8 (Top View)
RailClamp
www.semtech.com
8
7
6
5
I/O 3
REF 2
REF 2
I/O 4

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SRDA3.3-4.T Summary of contents

Page 1

... Circuit Diagram REF1 I/O 1 I/O 2 REF2 Revision 8/15/06 SRDA3.3-4 through SRDA12-4 Low Capacitance TVS Diode Array 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) IEC 61000-4-5 (Lightning) 24A (8/20µs) ...

Page 2

... PROTECTION PRODUCTS PROTECTION PRODUCTS Absolute Maximum Rating µ Electrical Characteristics Note: (1) The SRDA3.3-4 is constructed using Semtech’s propri- etary EPD process technology. See applications section for more information. 2006 Semtech Corp. SRDA3.3-4 through SRDA12 µ µ ° µ µ µ µ ...

Page 3

... PROTECTION PRODUCTS PROTECTION PRODUCTS Electrical Characteristics (continued 2006 Semtech Corp. SRDA3.3-4 through SRDA12 ° µ µ µ µ ° µ µ µ µ www.semtech.com µ µ ...

Page 4

... Pulse Duration - t Pulse Waveform 110 100 (µs) Variation of Capacitance vs. Reverse Voltage -10 -12 - Reverse Voltage - V 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 110 100 100 1000 (µs) p Clamping Voltage vs. Peak Pulse Current 22 W aveform Parameters 8µ 20µ Forward Voltage vs. Forward Current ...

Page 5

... V F For negative events, the bottom diode will be biased when the voltage exceeds the V F 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 Data Line and Power Supply Protection Using Vcc as reference ) the F Data Line Protection with Bias and Power Supply Isolation Resistor ) ...

Page 6

... ESD suppression. The RailClamp’s integrated TVS diode helps to mitigate the effects of parasitic inductance in the power supply connection. During an ESD event, 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 Figure 1 - “Rail-To-Rail” Protection Topology (First Approximation 30V ...

Page 7

... Semtech application note SI99-01 for further information on board layout) SRDA3.3-4 EPD TVS Characteristics The internal TVS of the SRDA3.3-4 is constructed using Semtech’s proprietary EPD technology. The structure of the EPD TVS is vastly different from the traditional pn-junction devices that are internal to the SRDA05-4 and SRDA12-4 devices ...

Page 8

... 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. 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 8 www.semtech.com ...

Page 9

... PROTECTION PRODUCTS PROTECTION PRODUCTS Typical Applications 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 Universal Serial Bus ESD Protection T1/E1 Interface Protection 9 www.semtech.com ...

Page 10

... PROTECTION PRODUCTS PROTECTION PRODUCTS Applications Information - Spice Model Pin 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 Pin 2 & 3 0.6 nH Pin 5 & 8 SRDA3.3-4 Spice Model www.semtech.com ...

Page 11

... PROTECTION PRODUCTS PROTECTION PRODUCTS Applications Information - Spice Model 2006 Semtech Corp. SRDA3.3-4 through SRDA12-4 Pin 3 Pin 1 0.6 nH Pin 8 SRDA05-4 & SRDA12-4 Spice Model & www.semtech.com ...

Page 12

... REFERENCE JEDEC STD MS-012, VARIATION AA. Land Pattern - SO-8 (C) NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. 2006 Semtech Corp. SRDA3.3-4 through SRDA12 GAGE PLANE 0. (L1) A DETAIL ...

Page 13

... PROTECTION PRODUCTS PROTECTION PRODUCTS Ordering Information Note: Lead-free devices are RoHS/WEEE Compliant Contact Information for Semtech International 2006 Semtech Corp. SRDA3.3-4 through SRDA12 www.semtech.com ...

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