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PROTECTION PRODUCTS
PROTECTION PRODUCTS
LC03-6
Low Capacitance TVS for High-Speed
Data Interfaces
2000 watts peak pulse power (t
p
= 8/20s)
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) 100A (8/20s)
Protects two lines in common and differential mode
Low capacitance for high-speed interfaces
Low clamping and operating voltage
Integrated structure saves board space and
increases reliability
Solid-state silicon avalanche technology
Description
Features
Circuit Diagram
Schematic & PIN Configuration
Revision 10/12/04
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),
cable discharge events (CDE), 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)
JEDEC SO-8 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code
Packaging : Tube or Tape and Reel per EIA 481
T1/E1 Line Cards
T3/E3 and DS3 Interfaces
STS-1 Interfaces
ISDN S/T-Interfaces
ISDN U-Interfaces
10/100 Ethernet
1
2
3
4
5
6
7
8
Pin 1 and 8
Pin 4 and 5
Ground
Pin 2, 3, 6,
and 7
2
2004 Semtech Corp.
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PROTECTION PRODUCTS
LC03-6
Absolute Maximum Rating
Electrical Characteristics
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3
2004 Semtech Corp.
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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
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10
15
20
25
30
T im e (s)
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f
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-t
td = I
PP
/2
W aveform
Parameters:
tr = 8s
td = 20s
Pulse Waveform
Capacitance vs. Reverse Voltage
0
10
20
30
40
50
60
70
80
90
100
110
0
25
50
75
100
125
150
175
Ambient Temperature - T
A
(
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%
of
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4
6
8
10
12
14
16
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2
3
4
5
6
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R
(V)
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(
pF)
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Line-to-Line
f = 1MHz
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1 4
1 6
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W av eform
P aram eters :
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td = 2 0 s
0.1
1
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100
0.1
1
10
100
1000
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p
(s)
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6
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F
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P aram eters :
tr = 8 s
td = 2 0 s
4
2004 Semtech Corp.
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PROTECTION PRODUCTS
LC03-6
CH1 S21 LOG
5 dB/ REF 0 dB
START . 030 MHz
3
STOP 000 . 000 000 MHz
Insertion Loss S21
Typical Characteristics
5
2004 Semtech Corp.
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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 and 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.
T3/E3 and 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 and 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=8/20
s).
Connection for Differential (Line-to-Line) and
Common Mode Protection (Line-to-Ground)
Connection for Differential Protection
(Line-to-Line)
Applications Information
Matte Tin Lead Finish
Matte tin has become the industry standard lead-free
replacement for SnPb lead finishes. A matte tin finish
is composed of 100% tin solder with large grains.
Since the solder volume on the leads is small com-
pared to the solder paste volume that is placed on the
land pattern of the PCB, the reflow profile will be
determined by the requirements of the solder paste.
Therefore, these devices are compatible with both
lead-free and SnPb assembly techniques. In addition,
unlike other lead-free compositions, matte tin does not
have any added alloys that can cause degradation of
the solder joint.
6
2004 Semtech Corp.
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PROTECTION PRODUCTS
LC03-6
T1 Line Card Protection (Short-Haul Applications)
T3/E3 and STS-1 Protection
Typical Applications
7
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PROTECTION PRODUCTS
LC03-6
Typical Applications (Continued)
ISDN U-Interface Secondary Protection
ISDN S-Interface Protection
LC03-6
LC03-6
8
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PROTECTION PRODUCTS
LC03-6
Typical Applications (Continued)
High Speed Driver/Receiver Protection
10/100 Ethernet Protection
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2004 Semtech Corp.
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PROTECTION PRODUCTS
LC03-6
Outline Drawing - SO-8
Land Pattern - SO-8
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OR GATE BURRS.
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CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
DATUMS AND TO BE DETERMINED AT DATUM PLANE
NOTES:
1.
2.
-A-
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REFERENCE JEDEC STD MS-012, VARIATION AA.
4.
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INCHES
DIMENSIONS
Z
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X
DIM
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THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
NOTES:
1.
REFERENCE IPC-SM-782A, RLP NO. 300A.
2.
10
2004 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
LC03-6
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Rd., Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
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Ordering Information
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