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Semtech

SR12 Datasheet Preview

SR12 Datasheet

Low Capacitance TVS Diode Array

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PROTECTION PRODUCTS
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SR12 has been
specifically designed to protect sensitive components
which are connected to data and transmission lines from
overvoltages caused by ESD (electrostatic discharge), EFT
(electrical fast transients), and lightning.
The unique design of the SR12 incorporates four 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 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.
SR12
RailClamp
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) 0.5kV, 12A (8/20µs)
‹ Array of surge rated diodes with internal TVS Diode
‹ Protects two I/O lines
‹ Operating Voltage: 12 volts
‹ Low capacitance (5pF typical) for high-speed
interfaces
‹ Low clamping voltage
‹ Solid-state silicon-avalanche technology
Mechanical Characteristics
‹ JEDEC SOT-143 package
‹ UL 497B listed
‹ Molding compound flammability rating: UL 94V-0
‹ Marking : R12
‹ Packaging : Tape and Reel per EIA 481
‹ RoHS/WEEE Compliant
Applications
‹ ADSL
‹ Industrial Electronics
‹ RS-422 Interfaces
‹ Portable Electronics
‹ Microcontroller Input Protection
‹ WAN/LAN Equipment
Circuit Diagram
Pin 4
Pin 2
Pin 3
Schematic & PIN Configuration
4
1
Revision 04/11/05
Pin 1
23
SOT-143 (Top View)
1 www.semtech.com




Semtech

SR12 Datasheet Preview

SR12 Datasheet

Low Capacitance TVS Diode Array

No Preview Available !

SR12
PROTECTION PRODUCTS
Absolute Maximum Rating
Rating
Peak Pulse Power (tp = 8/20µs)
Peak Pulse Current (tp = 8/20µs)
Peak Forward Voltage (IF = 1A, tp=8/20µs)
Lead Soldering Temperature
Operating Temperature
Storage Temperature
Symbol
Ppk
IPP
VFP
TL
TJ
TSTG
Value
500
16
1.5
260 (10 sec.)
-55 to +125
-55 to +150
Units
Watts
A
V
°C
°C
°C
Electrical Characteristics
SR12
Parameter
Reverse Stand-Off Voltage
Reverse Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
Clamping Voltage
Junction Capacitance
Symbol
VRWM
VBR
IR
VC
VC
Cj
Conditions
It = 1mA
VRWM =12V, T=25°C
IPP = 5A, tp = 8/20µs
IPP = 16A, tp = 8/20µs
Between I/O pins and
Ground
VR = 0V, f = 1MHz
Between I/O pins
VR = 0V, f = 1MHz
Minimum
13.3
Typical
5
3
Maximum
12
1
24
31
10
Units
V
V
µA
V
V
pF
pF
2005 Semtech Corp.
2
www.semtech.com


Part Number SR12
Description Low Capacitance TVS Diode Array
Maker Semtech
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SR12 Datasheet PDF






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