PROTECTION PRODUCTS
PROTECTION PRODUCTS
LC05-6
Dual Low Capacitance TVS Array for
Telecom Line-Card Applications
Description
The LC05-6 has been specifically designed to protect
sensitive components which are connected to highspeed telecommunications lines from over voltages
caused by lightning, ESD (electrostatic discharge), and
EFT (electrical fast transients).
The device is in a JEDEC SO-16 NB package. It is
designed to provide metallic surge protection for two
tip & ring line pairs. The low capacitance topology
means signal integrity is preserved on high-speed lines.
The high surge capability (2000W, tp=8/20µs) makes
the LC05-6 suitable for telecommunications systems
operating in harsh transient environments.
The LC05-6 is designed to meet the lightning surge
requirements of Bellcore GR-1089 (intra-building), ITU
K.20, and IEC 61000-4-5. The features of the LC05-6
are ideal for protecting T1/E1 transceivers in WAN
applications.
Features
u Transient protection for high-speed data lines to
Bellcore GR 1089 I
ITU K.20 IPP=40A (5/310µs)
IEC 61000-4-5 (Lightning) IPP=100A (8/20µs)
IEC 61000-4-2 (ESD) >25kV
=100A (2/10µs)
PP
u Protects two tip and ring line pairs
u Low capacitance for high-speed interfaces
u High surge capability
u Low clamping voltage
u Solid-state silicon avalanche technology
Mechanical Characteristics
u JEDEC SO-16 package
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 Equipment
u CSU/DSU
u Multiplexers
u Routers
u ISP Equipment
u Customer Premise Equipment
Circuit Diagram Schematic & PIN Configuration
TIP
RING
SO-16 (Top View)
Revision 9/2000
1
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PROTECTION PRODUCTS
Absolute Maximum Rating
LC05-06
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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
LC05-06
100
(kW)
PP
10
1
Peak Pulse Power - P
0.1
0.1 1 10 100 1000
Pulse Duration - tp (µs)
Pulse Waveform
110
100
90
80
70
PP
60
50
40
Percent of I
30
20
10
0
0 5 10 15 20 25 30
-t
e
Time (µs)
td = IPP/2
Capacitance vs. Reverse Voltage
6
Waveform
Parameters:
tr = 8µs
td = 20µs
110
100
90
PP
80
70
60
50
40
30
% of Rated Power or I
20
10
0
0 25 50 75 100 125
Ambient Temp erature - T
(oC)
A
Clamping Voltage vs. Peak Pulse Current
16
14
12
(V)
c
10
8
6
4
Clamping Voltage - V
2
0
0 20406080100
Peak Pulse Current - I
(A)
pp
Waveform
Parameters:
tr = 8µs
td = 20µs
5
4
3
2
Capacitance (pF)
1
0
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Reverse Voltage (V)
ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
Applications Information
Device Connection Options for Protection of Two
High-Speed Line Pairs
The LC05-6 is designed to protect four high-speed data
lines (two differential pairs) from transient over-voltages which result from lightning and ESD. Protection
of two line pairs is achieved by connecting the device
as follows: Pins 1-4 are connected to line 1 of the first
pair (i.e. Tip 1) and pins 13-16 are connected to line 2
of the first pair (i.e. Ring 1). Pins 5-8 are connected to
line 1 of the second pair (i.e. Tip 2) and pins 9-12 are
connected to line two of the second pair (i.e. Ring 2).
All pins should be connected for best results. Minimize
parasitic inductance in the protection circuit path by
keeping the trace length between the protected line
and the LC05-6 as short as possible.
LC05-06
Figure 1 - Connection for Differential (Line-to-Line)
Protection of two Tip/Ring Line Pairs
TIP 1
TIP 2
RING 1
RING 2
T1/E1 Linecard Protection
A typical T1/E1 linecard protection circuit is shown in
Figure 2. The LC05-6 is connected between Tip & Ring
on the transmit and receive line pairs. It provides
protection to metallic (line-to-line) lightning and ESD
surges. It is designed to meet the intra-building requirements of Bellcore GR-1089. This design takes
advantage 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.
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PROTECTION PRODUCTS
Typical Applications
LC05-06
Figure 2 - T1 Line Card Protection
ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
Outline Drawing - SO-16
LC05-06
Land Pattern - SO-16
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PROTECTION PRODUCTS
Ordering Information
LC05-06
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Note:
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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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