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PROTECTION PRODUCTS
PROTECTION PRODUCTS
LC03-6
Low Capacitance Surface Mount TVS for
High-Speed Data Interfaces
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2000 watts peak pulse power (tp = 8/20s)
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Transient protection for high-speed data lines to
Bellcore 1089 (Intra-Building) 100A (2/10s)
ITU K.20 I
PP
=40A (5/310s)
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 24A (1.2/50s)
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Protects two lines in common and differential mode
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Low capacitance for high speed interfaces
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Low clamping and operating voltage
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Integrated structure saves board space and
increases reliability
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Solid-state silicon avalanche technology
Description
Features
Circuit Diagram
Schematic & PIN Configuration
Revision 9/2000
Applications
Mechanical Characteristics
The LC03-6 transient voltage suppressor is designed to
protect components which are connected to high
speed telecommunication lines from voltage surges
caused by lightning, electrostatic discharge (ESD), and
electrical fast transients (EFT).
TVS diodes are ideal for use as board level protection
of sensitive semiconductor components. The LC03-6
combines a TVS diode with a rectifier bridge to provide
transient protection in both common and differential
mode with a single device. The capacitance of the
device is minimized (< 25pF) to ensure correct signal
transmission on high speed lines . The LC03-6 meets
the short-haul (intra-building) transient immunity
requirements of Bellcore 1089 for telecommunications
applications.
The SO-8 surface mount package allows flexibility in
the design of crowded PC boards.
SO-8 (Top View)
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JEDEC SO-8 package
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UL 497B listed
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Molding compound flammability rating: UL 94V-0
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Marking : Part number, date code, logo
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Packaging : Tube or Tape and Reel per EIA 481
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T1/E1 Line Cards
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T3/E3 and DS3 Interfaces
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STS-1 Interfaces
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ISDN S/T-Interfaces
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ISDN U-Interfaces
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10/100 Ethernet
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Absolute Maximum Rating
Electrical Characteristics
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
Clamping Voltage vs. Peak Pulse Current
0
10
20
30
40
50
60
70
80
90
100
110
0
5
10
15
20
25
30
Time (
s)
Percent of I
PP
e
-t
td = I
PP
/2
Waveform
Parameters:
tr = 8
s
td = 20
s
Pulse Waveform
Capacitance vs. Reverse Voltage
0
10
20
30
40
50
60
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80
90
100
110
0
25
50
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100
125
150
175
Ambient Temperature - T
A
(
o
C)
% of Rated Power or I
PP
0
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4
6
8
10
12
14
16
18
0
1
2
3
4
5
6
7
Reverse Voltage (V)
Capacitance (pF)
Line-to-Ground
Line-to-Line
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8
10
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16
18
20
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Line-T o -Line
Line-T o -Gro und
W aveform
Param eters:
tr = 8
s
td = 20
s
0.1
1
10
100
0.1
1
10
100
1000
Pulse Duration - tp (
s)
Peak Pul
se Power
-
P
PP
(k
W)
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Device Connection Options for Protection of Two
High-Speed Data Lines
The LC03-6 is designed to protect two high-speed data
lines (one differential pair) from transient over-voltages
which result from lightning and ESD. The device can be
configured to protect in differential (Line-to-Line) and
common (Line-to-Ground) mode. Data line inputs/
outputs are connected at pins 1 to 8, and 4 to 5 as
shown. Pins 2, 3, 6, and 7 are connected to ground.
These pins should be connected directly to a ground
plane on the board for best results. The path length is
kept as short as possible to minimize parasitic induc-
tance. In applications where high common mode
voltages are present, differential protection is achieved
by leaving pins 2, 3, 6, and 7 not connected.
T1/E1 Linecard Protection (Intra-Building)
A typical T1/E1 linecard protection circuit is shown
below. The LC03-6 is connected between Tip & Ring
on the transmit and receive line pairs. It provides
protection to metallic and common mode lightning
surges per Bellcore 1089. This design takes advan-
tage of the isolation of the transformer to suppress
common mode surges. To complete the protection
circuit, the SRDA05-4 (or SRDA3.3-4 for 3.3V supplies)
is employed as the IC side protection element. This
device helps prevent the transceiver from latching up
by providing fine clamping of transients that are
coupled through the transformer. For further informa-
tion, reference Semtech application note AN97-10
Connection for Differential (Line-to-Line) and
Common Mode Protection (Line-to-Ground)
Connection for Differential Protection
(Line-to-Line)
Applications Information
T3/E3 & STS-1 Protection
The LC03-6 can also be used to protect T3/E3 and
STS-1 interfaces. The data lines from the BNC inter-
face are run through the LC03-6 (i.e. enters at pin 1
and exits at pin 8) with the ground connection made at
the other side of the device (pins 4 & 5). The center
pins (2, 3, 6, and 7) are not connected. In this configu-
ration, the LC03-6 adds less than 12pF of capacitance
to each line and provides surge protection to 100A
(tp=8/20ms).
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
T1 Line Card Protection (Short-Haul Applications)
T3/E3 & STS-1 Protection
Typical Applications
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Typical Applications (Continued)
ISDN U-Interface Secondary Protection
ISDN S-Interface Protection
LC03-6
LC03-6
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Typical Applications (Continued)
High Speed Driver/Receiver Protection
10/100 Ethernet Protection
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Outline Drawing - SO-8
Land Pattern - SO-8
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2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Contact Information
Semtech Corporation
Protection Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
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Note:
(1) No suffix indicates tube pack.
Ordering Information
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