PROTECTION PRODUCTS
1www.semtech.com
PROTECTION PRODUCTS
LC04-6
Dual Low Capacitance T VS Array for
Telecom Linecard Applications
Transient protection for high-speed data lines to
Bellcore GR-1089 IPP=70A (10/1000µs)
Bellcore GR 1089 IPP=100A (2/10µs)
ITU K.20 IPP=100A (5/310µs)
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 100A (8/20µs)
Protects two tip and ring line pairs
Low capacitance for high-speed interfaces
High surge capability
Low clamping voltage
Solid-state silicon avalanche technology
Description Features
Circuit Diagram Schematic & PIN Configuration
Revision 01/15/03
Applications
Mechanical Characteristics
The LC04-6 has been specifically designed to protect
sensitive components which are connected to high-
speed telecommunications lines from over voltages
caused by lightning, electrostatic discharge (ESD),
cable discharge events (CDE), and electrical fast
transients (EFT).
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 (1000W, tp=10/1000µs)
makes the LC04-6 suitable for telecommunications
systems operating in harsh transient environments.
The LC04-6 is designed to meet the lightning surge
requirements of Bellcore GR-1089 (Intra-building) , FCC
Part 68, ITU K.20, and IEC 61000-4-5. The features of
the LC04-6 are ideal for protecting T1/E1 transceivers
in WAN applications.
SO-16 (Top View)
JEDEC SO-16 package
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code, logo
Packaging : Tube or Tape and Reel per EIA 481
T1/E1 Line Cards
Base Stations
WAN Equipment
CSU/DSU
Multiplexers
Routers
ISP Equipment
Customer Premise Equipment
TIP
R
ING
Pi n 1 - 4
Pin 13 - 16
22003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Absolute Maximum Rating
Electrical Characteristics
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3
2003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve
Clamping Voltage vs. Peak Pulse CurrentPulse Waveform
Capacitance vs. Reverse Voltage
0
2
4
6
8
10
12
14
0 1020304050607080
Peak Pulse Current - IPP (A)
Clamping Voltage - VC (V)
Waveform
Parameters:
tr = 10µs
td = 1000µs
0
10
20
30
40
50
60
70
80
90
100
110
0 5 10 15 20 25 30
Time (µs)
Percent of IPP
e-t
td = IPP/2
Waveform
Parameters
tr = 8µs
td = 20µs
1
10
100
0.1 1 10 100 1000
Pulse Duratio n - tp (µs)
Peak Pulse P o wer - P pk (kW)
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150
Ambient Temp era t u r e - T A (oC)
% of Rated Power or IPP
0
2
4
6
8
10
12
14
01234567
Reverse Volt age - V R (V )
Capacitance - Cj (pF)
f=1MHz
Clamping Voltage vs. Peak Pulse Current
0
5
10
15
20
25
0 20 40 60 80 100 120 140 160 180 200
Peak Pulse Curren t - I PP (A)
Clamping Voltage - VC (V)
Waveform
Paramet ers:
tr = 8µs
td = 20µs
42003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Figure 1 - Connection for Differential (Line-to-Line)
Protection of two Tip/Ring Line Pairs
Device Connection Options for Protection of Two
High-Speed Line Pairs
The LC04-6 is designed to protect four high-speed data
lines (two differential pairs) from transient over-volt-
ages 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 LC04-6 as short as possible.
T1/E1 Linecard Protection
A typical T1/E1 linecard protection circuit is shown in
Figure 2. The LC04-6 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 re-
quirements of Bellcore GR-1089. This design takes
advantage of the isolation of the transformer to
suppress common mode surges. The LC04-6 may also
be configured to meet metallic surges of FCC Part68
when used in conjunction with a 5Ω (minimum) PTC or
line feed resistor (LFR). The PTC (or LFR + fuse) are
required to meet the AC power cross requirements, but
will also reduce the effective surge current to levels
within the capability of the LC04-6 (Table 1). To com-
plete 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.
The versatility of the LC04-6 makes it ideal for use with
combination long haul/short haul T1/E1 transceivers.
T
IP 1
T
IP 2
RING 1
RING 2
Applications Information
5
2003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Typical Applications
Figure 2 - T1/E1 Line Card protection
Table 1
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62003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Outline Drawing - SO-16
Land Pattern - SO-16
7
2003 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
LC04-6
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Rd., Camarillo, CA 930 12
Phone: (805)498-2111 FAX (805)498-3804
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Note:
(1) No suffix indicates tube pack.
Ordering Information