SEMTECH LC05-6

LC05-6
Dual Low Capacitance TVS Array for
Telecom Line-Card Applications
PROTECTION PRODUCTS
Description
Features
u Transient protection for high-speed data lines to
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.
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Bellcore GR 1089 IPP=100A (2/10µs)
ITU K.20 IPP=40A (5/310µs)
IEC 61000-4-5 (Lightning) IPP=100A (8/20µs)
IEC 61000-4-2 (ESD) >25kV
Protects two tip and ring line pairs
Low capacitance for high-speed interfaces
High surge capability
Low clamping voltage
Solid-state silicon avalanche technology
Mechanical Characteristics
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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
Applications
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Circuit Diagram
T1/E1 Line Cards
Base Stations
WAN Equipment
CSU/DSU
Multiplexers
Routers
ISP Equipment
Customer Premise Equipment
Schematic & PIN Configuration
TIP
RING
SO-16 (Top View)
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LC05-06
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbo l
Value
Units
Peak Pulse Pow er (tp = 8/20µ s)
Pp k
2000
Watts
Peak Pulse Current (tp = 8/20µ s)
I PP
100
A
Lead Sold ering Temp erature
TL
260 (10 sec.)
°C
Op erating Temp erature
TJ
-55 to +125
°C
TSTG
-55 to +150
°C
Storage Temp erature
Electrical Characteristics
LC05-6
Par ame te r
Symbo l
Co nd itio ns
Minimum
Typ ical
Maximum
Units
6
V
Reverse Stand -Off Voltage
V RWM
Reverse Breakd ow n Voltage
V BR
It = 1mA
IR
V RWM = 6V, T=25°C
15
µA
V RWM = 3V, T=25°C
2
µA
Reverse Leakage Current
6.8
V
Clamp ing Voltage
VC
IPP = 10A ,
tp = 10/1000µ s
12.5
V
Clamp ing Voltage
VC
IPP = 50A ,
tp = 8/20µ s
15
V
Clamp ing Voltage
VC
IPP = 100A ,
tp = 8/20µ s
20
V
Junction Cap acitance
Cj
Each Line
V R = 0V, f = 1MHz
15
pF
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PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
110
100
90
% of Rated Power or IPP
Peak Pulse Power - PPP (kW)
100
10
1
80
70
60
50
40
30
20
10
0
0.1
0.1
1
10
100
1000
0
25
Pulse Duration - tp (µs)
75
100
125
Clamping Voltage vs. Peak Pulse Current
Pulse Waveform
16
110
Waveform
Parameters:
tr = 8µs
td = 20µs
90
80
70
e
60
14
Clamping Voltage - Vc (V)
100
Percent of IPP
50
Ambient Temperature - T A ( o C)
-t
50
40
td = IPP/2
30
20
10
12
10
8
6
Waveform
Parameters:
tr = 8µs
td = 20µs
4
2
0
0
5
10
15
20
25
0
30
0
Time (µs)
20
40
60
80
100
Peak Pulse Current - Ipp (A)
Capacitance vs. Reverse Voltage
6
Capacitance (pF)
5
4
3
2
1
0
0
1
2
3
4
5
6
7
Reverse Voltage (V)
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LC05-06
PROTECTION PRODUCTS
Applications Information
Device Connection Options for Protection of Two
High-Speed Line Pairs
Figure 1 - Connection for Differential (Line-to-Line)
Protection of two Tip/Ring 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.
TIP 1
RING 1
TIP 2
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
Figure 2 - T1 Line Card Protection
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LC05-06
PROTECTION PRODUCTS
Outline Drawing - SO-16
Land Pattern - SO-16
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LC05-06
PROTECTION PRODUCTS
Ordering Information
P ar t
Numbe r
Wo r king
Vo ltage
Qty p e r
Reel
R e e l Size
LC05-6.TB
6V
500
7 Inch
LC05-6.TE
6V
2500
13 Inch
Note:
(1) No suffix indicates tube pack.
Contact Information
Semtech Corporation
Protection Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
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