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SRDA3.3-4 Datasheet Preview

SRDA3.3-4 Datasheet

Low Capacitance TVS Diode Array

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PROTECTION PRODUCTS - RailClamp®
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SRDA series
has been specifically designed to protect sensitive
components which are connected to data and trans-
mission lines from overvoltage caused by electrostatic
discharge (ESD), electrical fast transients (EFT), and
lightning.
The unique design incorporates surge rated, low
capacitance steering diodes and a TVS diode in a
single package. During transient conditions, the
steering diodes direct the transient current to ground
via the internal low voltage TVS. The TVS diode clamps
the transient voltage to a safe level. The low capaci-
tance array configuration allows the user to protect up
to four high-speed data lines.
The SRDA3.3-4 is constructed using Semtech’s
proprietary EPD process technology. The EPD process
provides low stand-off voltages with significant reduc-
tions in leakage current and capacitance over silicon-
avalanche diode processes. They feature a true
operating voltage of 3.3 volts for superior protection.
These devices are in a 8-pin SOIC package. It mea-
sures 3.9 x 4.9mm. They are available with a SnPb or
RoHS/WEEE compliant matte tin lead finish. The high
surge capability (Ipp=25A, tp=8/20μs) means it can be
used in high threat environments in applications such
as CO/CPE equipment, telecommunication lines, and
video lines.
SRDA3.3-4
RailClamp®
Low Capacitance TVS 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)
‹ Array of surge rated diodes with internal TVS diode
‹ Protects four I/O lines
‹ Low capacitance (<15pF) for high-speed interfaces
‹ Low operating voltage: 3.3V
‹ Low clamping voltage
‹ Solid-state technology
Mechanical Characteristics
‹ JEDEC SOIC-8 package
‹ Lead Finish: SnPb or Matte Sn
‹ Molding compound flammability rating: UL 94V-0
‹ Marking : Part number, date code, logo
‹ Packaging : Tape and Reel per EIA 481
Applications
‹ T1/E1 secondary IC Side Protection
‹ T3/E3 secondary IC Side Protection
‹ Analog Video Protection
‹ Microcontroller Input Protection
‹ Base stations
‹ I2C Bus Protection
Circuit Diagram
Schematic and PIN Configuration
2, 3
I/O 1
I/O 2
I/O 3
I/O 4
5, 8
I/O 1 1
NC 2
NC 3
I/O 2 4
Revision 01/15/08
1
8 GND
7 I/O 4
S0-8 (Top View)
6 I/O 3
5 GND
www.semtech.com




Semtech

SRDA3.3-4 Datasheet Preview

SRDA3.3-4 Datasheet

Low Capacitance TVS Diode Array

No Preview Available !

SRDA3.3-4
PROTECTION PRODUCTS
Absolute Maximum Rating
Rating
Peak Pulse Power (tp = 8/20μs)
Peak Pulse Current (tp = 8/20μs)
Lead Soldering Temperature
Operating Temperature
Storage Temperature
Symbol
Ppk
IPP
TL
TJ
TSTG
Value
500
25
260 (10 sec.)
-40 to +85
-55 to +150
Units
Watts
A
°C
°C
°C
Electrical Characteristics (T=25oC)
SRDA3.3-4
Parameter
Reverse Stand-Off Voltage
Punch-Through Voltage
Snap-Back Voltage
Reverse Leakage Current
Clamping Voltage
Clamping Voltage
Clamping Voltage
Junction Capacitance
Symbol
VRWM
VPT
VSB
IR
VC
VC
VC
Cj
Conditions
IPT = 2μA
ISB = 50mA
VRWM = 3.3V, T=25°C
IPP = 1A, tp = 8/20μs
IPP = 10A, tp = 8/20μs
IPP = 25A, tp = 8/20μs
Between I/O pins and
Ground
VR = 0V, f = 1MHz
Between I/O pins
VR = 0V, f = 1MHz
Minimum
3.5
2.8
Typical
8
4
Maximum
3.3
1
5.3
10
15
15
Units
V
V
V
μA
V
V
V
pF
pF
© 2008 Semtech Corp.
2
www.semtech.com


Part Number SRDA3.3-4
Description Low Capacitance TVS Diode Array
Maker Semtech
Total Page 8 Pages
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