PROTECTION PRODUCTSPROTECTION PRODUCTS
LC03-6
Low Capacitance Surface Mount TVS for
High-Speed Data Interfaces
Description
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.
Features
u 2000 watts peak pulse power (tp = 8/20µs)
u Transient protection for high-speed data lines to
Bellcore 1089 (Intra-Building) 100A (2/10µs)
ITU K.20 I
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 24A (1.2/50µs)
=40A (5/310µs)
PP
u Protects two lines in common and differential mode
u Low capacitance for high speed interfaces
u Low clamping and operating voltage
u Integrated structure saves board space and
increases reliability
u Solid-state silicon avalanche technology
Mechanical Characteristics
u JEDEC SO-8 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 T3/E3 and DS3 Interfaces
u STS-1 Interfaces
u ISDN S/T-Interfaces
u ISDN U-Interfaces
u 10/100 Ethernet
Circuit Diagram Schematic & PIN Configuration
1
2
3
45
8
7
6
Revision 9/2000
SO-8 (Top View)
1
www.semtech.com
PROTECTION PRODUCTS
Absolute Maximum Rating
LC03-6
gnitaRlobmySeulaVstinU
)sµ02/8=pt(rewoPesluPkaePP
erutarepmeTgniredloSdaeLT
erutarepmeTgnitarepOT
erutarepmeTegarotST
Electrical Characteristics
6-30CL
retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU
egatloVffO-dnatSesreveRV
egatloVnwodkaerBesreveRV
tnerruCegakaeLesreveRI
egatloVgnipmalCV
egatloVgnipmalCV
kp
)sµ02/8=pt(tnerruCesluPkaePI
MWR
I
RB
R
C
C
V
MWR
I
PP
I
PP
Am1=8.6V
t
C°52=T,V6=52Aµ
PP
L
J
GTS
sµ02/8=pt,A05=51V
sµ02/8=pt,A001=02V
0002sttaW
001A
).ces01(062C°
521+ot55-C°
051+ot55-C°
6V
ecnaticapaCnoitcnuJC
j
dnasnipO/IneewteB
dnG
V
R
zHM1=f,V0=
snipO/IneewteB
V
R
zHM1=f,V0=
6152Fp
821Fp
2ã 2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
µ
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve
LC03-6
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
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 75 100 125 150 175
Ambient Temperature - T
A
(oC)
Clamping Voltage vs. Peak Pulse Current
20
18
16
(V)
14
C
12
10
8
6
Clamping Voltage - V
4
2
0
0 102030405060708090100110
Peak Pulse Current - I
PP
Line-To-Line
Line-To-Ground
Waveform
Param eters :
tr = 8µs
td = 20
(A)
s
Capacitance vs. Reverse Voltage
18
16
14
12
10
8
6
Capacitance (pF)
4
2
0
01234567
Reverse Volt age (V)
Line-to-Groun
Line-to-Line
ã 2000 Semtech Corp.
d
3
www.semtech.com
PROTECTION PRODUCTS
Applications Information
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 inductance. 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 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. For further information, 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)
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 interface 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 configuration, the LC03-6 adds less than 12pF of capacitance
to each line and provides surge protection to 100A
(tp=8/20ms).
4ã 2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
Typical Applications
LC03-6
T1 Line Card Protection (Short-Haul Applications)
ã 2000 Semtech Corp.
T3/E3 & STS-1 Protection
5
www.semtech.com
PROTECTION PRODUCTS
Typical Applications (Continued)
LC03-6
LC03-6
LC03-6
ISDN S-Interface Protection
ISDN U-Interface Secondary Protection
6ã 2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
Typical Applications (Continued)
LC03-6
10/100 Ethernet Protection
High Speed Driver/Receiver Protection
ã 2000 Semtech Corp.
7
www.semtech.com
PROTECTION PRODUCTS
Outline Drawing - SO-8
LC03-6
Land Pattern - SO-8
8ã 2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
Ordering Information
LC03-6
traP
rebmuN
BT.6-30CLV6005hcnI7
ET.6-30CLV60052hcnI31
Note:
(1) No suffix indicates tube pack.
gnikroW
egatloV
repytQ
leeR
eziSleeR
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
9
www.semtech.com
Loading...