PROTECTION PRODUCTS
LC01-6
Low Capacitance TVS for High-Speed
Telecommunication Systems
Description
The LC01-6 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 LC01-6
is designed for metallic mode, secondary line side
protection in digital line card applications. It features
solid-state silicon-avalanche technology for unmatched
transient protection without device degradation. The
LC01-6 combines TVS diodes with low capacitance
compensation diodes to provide an integrated, low
capacitance protection solution. Additional features
include sub-nanosecond response time, a low operating voltage of 6 volts, and low clamping voltage.
The LC01-6 is suitable for use on T1/E1 and xDSL
interfaces in equipment such as base stations, routers,
and channel service units. The LC01-6 meets the longhaul (outer-building) transient immunity requirements
of Bellcore 1089, FCC Part 68 (Type A and B surges),
and IEC 61000-4-5.
Features
u 1500 watts peak pulse power (tp = 10/1000µs)
u Transient protection for high speed data lines to
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-5 (Lightning) 95A (8/20µs)
Bellcore 1089 (Outer-Building),
100A (10/1000µs), 500A (2/10µs)
FCC Part 68 200A (10/160µs)
ITU K.20 200A (5/310µs)
u Differential protection for one Tip & Ring line pair
u Low capacitance for high speed interfaces
u Low operating & clamping voltage
u Integrated structure saves board space and
increases reliability
u Solid-state silicon-avalanche technology
Mechanical Characteristics
u JEDEC SO-16W package
u UL 497B listed
u Molding compound flammability rating: UL 94V-0
u Marking : Part number, date code, logo
u Packaging : Tube or Tape and Reel per EIA 481
Applications
u T1/E1 Line Cards
u Base Stations
u WAN Interfaces
u xDSL Interfaces
u CSU/DSU Equipment
Circuit Diagram Schematic & PIN Configuration
SO-16W (Top View)
Revision 9/2000
1
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PROTECTION PRODUCTS
Absolute Maximum Rating
LC01-6
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Electrical Characteristics
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2ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve
LC01-6
100
(kW)
PP
10
Peak Pulse Power - P
1
0.1 1 10 100 1000
Pulse Duration - tp (µs)
110
100
90
80
70
PP
60
50
40
Percent of I
30
20
10
0
0 10 1000 3000
-t
e
td = IPP/2
Time (µs)
Waveform
Parameters:
td = 1000µs
tr = 10µs
110
100
90
PP
80
70
60
50
40
30
% of Rated Power or I
20
10
0
0 25 50 75 100 125 150 175
Ambient Temperature - T
A
(oC)
Clamping Voltage vs. Peak Pulse CurrentPulse Waveform
14
12
(V)
C
10
8
6
4
Clamping Voltage - V
2
0
0 102030405060708090100110
Peak Pulse Current - I
(A)
PP
Waveform
Parameters:
tr = 10µs
td = 1000µs
Capacitance vs. Reverse Voltage
41.5
41
40.5
40
39.5
Typical Capacitance (pF)
39
38.5
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ã 2000 Semtech Corp.
Reverse Voltage (V)
Pins 1-8 tied together
Pins 9 - 16 tied together
f = 1MHz
3
AC Power Dissipation
6
5
4
3
Power (Watts)
2
1
0
1 10 100 1000
Time (Seconds)
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PROTECTION PRODUCTS
Applications Information
Device Connection Options for Protection of HighSpeed Data Lines
The LC01-6 is designed to protect high-speed data
lines from transient over-voltages which result from
lightning and ESD. The device is designed to protect
one line pair in differential (Line-to-Line) mode. Pins 18 are connected to line 1 and pins 9-16 are connected
to line 2 as shown. All pins should be connected for
best results.
T1/E1 Linecard Protection
LC01-6
A typical long-haul T1/E1 linecard protection circuit is
shown below. The LC01-6 is connected between Tip &
Ring on the transmit and receive line pairs. It provides
protection to metallic (line-to-line) lightning surges per
Bellcore 1089 and FCC Part 68. Depending on the
application, a high voltage crowbar device (not shown)
such as a gas discharge tube (GDT) or TVS Thyristor
may be used to suppress common mode (line-toground) surges. To complete the protection circuit, the
SRDA05-4 (or SRDA3.3-4 for 3.3V supplies) is employed as the secondary 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. Positive temperature
coefficient (PTC) resistors or fuses are also required for
AC power cross protection. For further information,
reference Semtech application note AN97-10.
Figure 1 - Schematic and Pin Configuration
Figure 2 - Connection for Differential Protection
(Line-to-Line)
4ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
Typical Applications
LC01-6
T1 Line Card Protection (Long-Haul Applications)
ã 2000 Semtech Corp.
SDSL Protection
5
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PROTECTION PRODUCTS
Outline Drawing - SO-16W
LC01-6
Land Pattern - SO-16W
6ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
Ordering Information
LC01-6
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Note:
(1) No suffix indicates tube pack.
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Contact Information
ã 2000 Semtech Corp.
Semtech Corporation
Protection Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
7
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