High Power TVS for
Ethernet Interfaces
PROTECTION PRODUCTS - RailClamp
®
Description
RailClamp
®
TVS diodes are specifically designed to
protect sensitive components which are connected to
high-speed data and transmission lines from overvolt-
age caused by ESD (electrostatic discharge), CDE
(cable discharge events), and EFT (electrical fast
transients).
The unique design incorporates surge rated, low
capacitance steering diodes and a TVS diode in a
single package. The RClamp
®
3374N is designed to
replace up to two components for board level GbE
protection. Each device is designed to protect two line
pairs. This is accomplished by routing traces through
the device. When connected in this fashion, the device
can withstand a high level of surge current (40A, 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 RClamp3374N 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. It features a true operat-
ing voltage of 3.3 volts for superior protection.
The RClamp3374N is in a 10-pin SLP3020N10 pack-
age. It measures 3.0 x 2.0 x 0.60mm. The leads are
finished with lead-free NiPdAu.
RClamp3374N
PRELIMINARY
Features
Transient protection for high-speed data lines to
IEC 61000-4-2 (ESD) ±30kV (air), ±30kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 40A (8/20μs)
Array of surge rated diodes with internal TVS Diode
Qualified to
AEC-Q100 Grade 1
(-45 to +125
o
C)
Protects up to eight lines
Low capacitance for high-speed interfaces
Low variation in capacitance vs. bias voltage
Low clamping voltage
Low operating voltage: 3.3V
Solid-state silicon-avalanche technology
Mechanical Characteristics
SLP3020N10 10L package
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Nominal Dimensions: 3.0 x 2.0 x 0.60 mm
Lead Finish: NiPdAu
Molding compound flammability rating: UL 94V-0
Marking : Marking code + Date code
Packaging : Tape and Reel
Applications
10/100/1000 Ethernet
Automotive
Central Office Equipment
LVDS Interfaces
MagJacks / Integrated Magnetics
Notebooks / Desktops / Servers
Circuit Diagram
Pin 1
LINE 1 In
Pin 4
LINE 3 In
Pin Configuration
Line 1 In
Line 2 In
Pin 10
LINE 1 Out
Pin 2
LINE 2 In
Pin 7
LINE 3 Out
Pin 5
LINE 4 In
1
10
Line 1 Out
Line 2 Out
GND
GND
Line 3 In
GND
GND
Line 3 Out
GND
Line 4 In
Pin 9
LINE 2 Out
Pin 6
LINE 4 Out
5
6
Line 4 Out
Center Tabs
and Pins 3, 8
Top View
1
www.semtech.com
Revision 7/24/2012
RClamp3374N
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Peak Pulse Power (tp = 8/20
μ
s)
1
Peak Pulse Current (tp = 8/20
μ
s)
1
ESD p er IEC 61000-4-2 (Air)
ESD p er IEC 61000-4-2 (Contact)
Op erating Temp erature
Storage Temp erature
Symbol
P
p k
I
P P
V
ESD
T
J
T
STG
Value
1000
40
+/-30
+/-30
-40 to +125
-55 to +150
PRELIMINARY
Units
Watts
A
kV
°C
°C
Electrical Characteristics (T=25
o
C unless otherwise specified)
Parameter
Reverse Stand-Off Voltage
Punch-Through Voltage
Snap -Back Voltage
Reverse Leakage Current
Reverse Leakage Current
Clamp ing Voltage
2
Clamp ing Voltage
2
Clamp ing Voltage
2
Clamp ing Voltage
1,2
Symbol
V
RWM
V
PT
V
SB
I
R
I
R
V
C
V
C
V
C
V
C
I
PT
= 2
μ
A
I
SB
= 50mA
V
RWM
= 3.3V, T=25°C
V
RWM
= 3.3V, T=125°C
I
PP
= 1A, t
p
= 8/20
μ
s
Any I/O to Ground
I
PP
= 10A, t
p
= 8/20
μ
s
Any 1 I/O to Ground
I
PP
= 25A, t
p
= 8/20
μ
s
Any I/O to Ground
I
PP
= 40A, t
p
= 8/20
μ
s
Line-to-Line, two I/O p ins
connected together on each
line (N ote 1)
V
R
= 0V, f = 1MHz
Any I/O to Ground
V
R
= 0V, f = 1MHz
Between I/O p ins
3.6
1.7
3.5
2.8
0.5
1
5.5
10.5
18
25
Conditions
Minimum
Typical
Maximum
3.3
Units
V
V
V
μ
A
μ
A
V
V
V
V
Junction Cap acitance
2
C
j
5
pF
pF
Notes:
1) Ratings with 2 pins connected together per the recommended configuration (ie pin 1 connected to pin 10, pin 2 connected to pin 9, pin 4
connected to pin 7, and pin 5 connected to pin 6).
2) Guaranteed by design (not production tested)
©
2012 Semtech Corporation
2
www.semtech.com
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