RClamp®3354S Low Voltage RClamp® Surge Protection

RClamp®3354S
Low Voltage RClamp®
Surge Protection for GbE Interfaces
PROTECTION PRODUCTS - RailClamp®
Description
Features
®
u Transient protection for high-speed data lines to
RailClamp TVS diodes are specifically designed to
protect sensitive 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 RClamp®3354S incorporates surge rated, low
capacitance steering diodes and a TVS diode in a single
package. Each device will protect up to four high-speed
lines. The RClamp3354S can withstand a high level of
surge current (25A, 8/20us) while maintaining a low
loading capacitance of less than 5pF. The high surge
capability means it can be used in high threat environments in applications such as Gigabit Ethernet, telecommunication lines, and LVDS interfaces.
The RClamp3354S is constructed using Semtech’s proprietary EPD process technology. The EPD process provides low stand-off voltages with significant reductions in
leakage current and capacitance over silicon-avalanche
diode processes. It features a low operating voltage of
3.3 volts for superior protection.
The RClamp3354S is in a 5-lead SOT-23 package. The
leads are finished with lead-free matte tin.
IEC 61000-4-2 (ESD) 30kV (air), 30kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 25A (8/20µs)
u
u
u
u
u
u
Array of surge rated diodes with internal TVS Diode
Protects up to four I/O lines
Low capacitance (<5pF) for high-speed interfaces
Low Dynamic Resistance: 0.25 Ohms
Low operating voltage: 3.3V
Solid-state silicon-avalanche technology
Mechanical Characteristics
u
u
u
u
u
JEDEC SOT-23 5L package
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Molding compound flammability rating: UL 94V-0
Marking : Marking code + date code
Packaging : Tape and Reel
Applications
u
u
u
u
u
Circuit Diagram
10/100/1000 Ethernet
Central Office Equipment
LVDS Interfaces
MagJacks / Integrated Magnetics
Notebooks / Desktops / Servers
Pin Configuration
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RClamp3354S
PROTECTION PRODUCTS
Absolute Maximum Ratings
Rating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
PPK
400
W
Peak Pulse Current (tp = 8/20µs)
IPP
25
A
30
ESD per IEC 61000-4-2 (Air)
kV
VESD
ESD per IEC 61000-4-2 (Contact)
TJ
-55 to +85
O
TSTG
-55 to +150
O
Operating Temperature
Storage Temperature
30
C
C
Electrical Characteristics (T=25OC unless otherwise specified)
Parameter
Reverse Stand-Off Voltage
Symbol
Conditions
Min.
Typ.
VRWM
Max.
Units
3.3
V
5.3
V
Punch-Through Voltage
VPT
IPT = 2µA
3.5
Snap-Back Voltage
VSB
ISB = 50mA
2.8
IR
VRWM = 3.3V, T=25°C
0.5
IPP = 1A, tp = 8/20µs
Any I/O to Ground
5.5
IPP = 10A, tp = 8/20µs
Any I/O to Ground
10
IPP = 25A, tp = 8/20µs
Any I/O to Ground
16
Reverse Leakage Current
Clamping Voltage
Junction Capacitance
 2013 Semtech Corporation.
VC
CJ
V
Between I/O pins and Ground
VR = 0V, f = 1MHz
3.8
Between I/O pins
VR = 0V, f = 1MHz
2.0
2
µA
V
5
pF
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RClamp3354S
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs.Pulse Time
Power Derating Curve
120
10
TA = 25OC
% of Rated Power or IPP
Peak Pulse Power - PPP (kW)
100
1
0.1
80
60
40
20
DR040512:25:125:150
DR040412-400
0.01
0.1
1
10
100
0
1000
0
25
Pulse Duration - tp (µs)
125
ESD Clamping (+8kV Contact per IEC 61000-4-2)
ESD Clamping (-8kV Contact per IEC 61000-4-2)
50
TA = 25OC
+8kV ESD Pulse per IEC61000-4-2
Corrected for 40dB attenuation.
Measured with 50Ω, 40dB attenuator;
50Ω Scope Input Impedance
0
Voltage (V)
100
50
0
-50
TA = 25OC
-8kV ESD Pulse per IEC61000-4-2
Corrected for 40dB attenuation.
Measured with 50Ω, 40dB attenuator;
50Ω Scope Input Impedance
-100
-150
AR_RC3354S_ESD -8kV
AR_RC3354S_ESD +8kV
-50
-200
-20
0
20
40
60
80
100
-20
0
20
Time (ns)
Positive TLP Characteristic
40
Time (ns)
60
80
100
Negative TLP Characteristic
0
30
TA = 25OC
TLP Parameters
tp = 100ns; tr = 200ps
Pins 1, 3, 4 or 5 to Gnd
TA = 25OC
TLP Parameters
tp = 100ns; tr = 200ps
Pins 1, 3, 4 or 5 to Gnd
-5
TLP Current - IDUT (A)
25
TLP Current - IDUT (A)
150
200
150
Voltage (V)
50
75
100
Ambient Temperature - TA (OC)
20
15
RDYN = 0.19Ω
Best Fit 4A to 16A
10
-10
-15
RDYN = 0.34Ω
Best Fit 4A to 16A
-20
-25
5
AR_RC3354S_TLP-
AR_RC3354S_TLP+
-30
0
0
2
4
6
Clamping Voltage - VC (V)
 2013. Semtech Corporation.
8
-12
10
3
-10
-8
-6
Clamping Voltage - VC (V)
-4
-2
0
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RClamp3354S
PROTECTION PRODUCTS
Typical Characteristics (Continued)
Typical Insertion Loss S21
Analog Crosstalk
5
0
TA = 25OC
Pin1 to Pin5
0
Crosstalk - CT (dB)
Insertion Loss - IL (dB)
-20
-5
-10
-15
-60
TA = 25OC
Pin1 to Gnd
-20
-40
AR_RC3354S_CT
AR_RC3354S_IL
-25
-80
1
10
100
1000
Frequency - f (MHz)
10000
1
Capacitance v Reverse Voltage (Line to GND)
10
100
1000
Frequency - f (MHz)
10000
Capacitance v Reverse Voltage (Line to Line)
1.5
5
TA = 25OC
f = 1 MHz
TA = 25OC
f = 1 MHz
Capacitance - CJ (pF)
Capacitance - CJ (pf)
4
3
2
1.0
0.5
1
AR_RC3354S_CAP (LG)
AR_RC3354S_CAP (LL)
0.0
0
0
0.5
1
1.5
2
2.5
3
0
3.5
Reverse Voltage - VR(V)
 2013 Semtech Corporation.
4
1
2
Reverse Voltage - VR(V)
3
4
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RClamp3354S
PROTECTION PRODUCTS
Applications Information
Gigabit Ethernet Protection Solutions
Ethernet systems with connections external to the building are subject to high-level transient threats. This type
of equipment may even be required to meet the surge
immunity requirements of Telcordia GR-1089. Reliable protection of the Ethernet transceiver requires a
device that can absorb the expected transient energy,
clamp the incoming surge to a safe level, and yet remain
transparent to the system under normal operation. The
RClamp3354S has been designed to meet these demanding requirements.
Transient Protection
When designing Ethernet protection, the entire system
must be considered. An Ethernet port includes interface
magnetics in the form of transformers and common
mode chokes. Transformers and chokes can be discrete
components, but integrated solutions that include the
RJ-45 connector, resistors, capacitors, and protection
are also available. In either case, the transformer will
provide a high level of common mode isolation to external voltages, but no protection for metallic (line-to-line)
surges. During a metallic transient event, current will
flow into one line, through the transformer and back to
the source. As the current flows, it charges the windings
of the transformer on the line side. Once the surge is
removed, the windings on the line side will stop charging
and will transfer its stored energy to the IC side where
the PHY IC is located. The magnitude and duration of
the surge is attenuated by the inductance of the magnetics. The amount of attenuation will vary by vendor
and configuration of the magnetics. It is this transferred
energy that must be clamped by the protection circuitry.
 2013. Semtech Corporation.
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RClamp3354S
PROTECTION PRODUCTS
Outline Drawing - SOT-23 5L
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RClamp3354S
PROTECTION PRODUCTS
Ordering Information
BC
Marking
Part Number
Lead
Finish
Qty per
Reel
Reel
Size
RClamp3354S.TCT
Matte Tin
3,000
7 inch
RailClamp and RClamp are Trademarks of Semtech Corporation
#/$*%)2-2
YW = Alphanumeric character Date Code
Tape and Reel Specification
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All dimensions in mm
A0
B0
K0
B
(Max)
D
D1
E
F
K
(Max)
P
P0
P2
T
(MAX)
W
3.23
±0.05
3.17
±0.05
1.37
±0.05
4.2
1.5
+0.1
-0.0
1.0
±0.05
1.75
±0.10
3.5
±0.05
2.4
4.0
±0.1
4.0
±0.1
2.0
±0.05
0.4
8.0
+0.3
-0.1
Contact Information for Semtech International AG
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Fax: 44-1794-527-601
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Fax: 86-21-6391-0831
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Tel: 49-(0)8161-140-123
Fax: 49-(0)8161-140-124
Semtech International AG is a wholly-owned subsidiary of Semtech Corporation, which has its headquarters in the
U.S.A.
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