Semtech LC03-6TE Low capacitance surface mount tvs for high-speed data interface Datasheet

LC03-6
PROTECTION PRODUCTS
Description
Low Capacitance TVS for High-Speed
Data Interfaces
Features
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).
‹ 2000 watts peak pulse power (tp = 8/20µs)
‹ Transient protection for high-speed data lines to
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.
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Bellcore 1089 (Intra-Building) 100A (2/10µs)
ITU K.20 IPP=40A (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 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
Mechanical Characteristics
‹
‹
‹
‹
‹
‹
The SO-8 surface mount package allows flexibility in
the design of crowded PC boards.
JEDEC SO-8 package
RoHS/WEEE Compliant
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code
Packaging : Tube or Tape and Reel per EIA 481
Applications
‹
‹
‹
‹
‹
‹
Circuit Diagram
T1/E1 Line Cards
T3/E3 and DS3 Interfaces
STS-1 Interfaces
ISDN S/T-Interfaces
ISDN U-Interfaces
10/100 Ethernet
Schematic & PIN Configuration
1
8
2
7
3
6
4
5
Pin 1 and 8
Pin 2, 3, 6,
and 7
Ground
Pin 4 and 5
SO-8 (Top View)
Revision 01/18/2008
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LC03-6
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
Pp k
2000
Watts
Peak Pulse Current (tp = 8/20µs)
IP P
100
A
Lead Soldering Temperature
TL
260 (10 sec.)
°C
Operating Temperature
TJ
-55 to +125
°C
TSTG
-55 to +150
°C
Storage Temperature
Electrical Characteristics
LC03-6
Parameter
Symbol
Conditions
Minimum
Typical
Maximum
Units
6
V
Reverse Stand-Off Voltage
VRWM
Reverse Breakdown Voltage
V BR
It = 1mA
Reverse Leakage Current
IR
VRWM = 6V, T=25°C
25
µA
Clamp ing Voltage
VC
IPP = 50A, tp = 8/20µs
Line-to-Ground
15
V
Clamp ing Voltage
VC
IPP = 100A, tp = 8/20µs
Line-to-Ground
20
V
Junction Cap acitance
Cj
Between I/O p ins and
Ground
VR = 0V, f = 1MHz
16
25
pF
Between I/O p ins
VR = 0V, f = 1MHz
8
12
pF
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LC03-6
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
100
110
Peak Pulse Power - Ppk (kW)
100
% of Rated Power or IPP
90
10
1
80
70
60
50
40
30
20
10
0.1
0.1
1
10
100
0
1000
0
Pulse Duration - tp (µs)
90
125
150
175
18
16
Clamping Voltage - VC (V)
80
Percent of IPP
100
20
W aveform
Parameters:
tr = 8µs
td = 20µs
100
e -t
60
50
td = I PP /2
30
20
L in e-T o-L in e
14
12
L in e -T o -G rou n d
10
8
W a v efo rm
P ara m e ters :
tr = 8 µ s
td = 2 0 µ s
6
4
10
2
0
0
5
10
15
20
25
0
30
0
T im e (µs)
10
20
30
40
50
60
70
80
90
100
11 0
P e a k P u lse C u r re n t - I P P (A )
Normalized Capacitance vs. Reverse Voltage
Forward Voltage vs. Forward Current
1.4
6
1.2
5
Forward Voltage - VF (V)
1
C J(VR ) / C J(VR =0)
75
Clamping Voltage vs. Peak Pulse Current
110
40
50
Ambient Temperature - TA (oC)
Pulse Waveform
70
25
0.8
0.6
0.4
4
3
W a v efo rm
P ara m e ters :
tr = 8 µ s
td = 2 0 µ s
2
1
0.2
f = 1MHz
0
0
0
1
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2
3
4
Reverse Voltage - VR (V)
5
6
0
10
20
30
40
50
60
70
80
90
100
11 0
F o r w a r d C u r r e n t - I F (A )
3
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LC03-6
PROTECTION PRODUCTS
Typical Characteristics
Insertion Loss S21 - I/O to Gnd
Insertion Loss S21 - I/O to I/O
CH1 S21
LOG
6 dB / REF 0 dB
CH1 S21
LOG
6 dB / REF 0 dB
1: -3.03 dB
910 MHz
0 dB
4
2: -2.84 dB
900 MHz
-12 dB
4
2
-12 dB
-24 dB
-30 dB
-30 dB
-36 dB
-36 dB
-42 dB
-42 dB
-48 dB
1
MHz
START . 030 MHz
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10
MHz
100
MHz
-48 dB
3
1
GHz GHz
STOP 3000. 000000 MHz
3
1
MHz
START . 030 MHz
4
3: -23.03 dB
1.8 GHz
4: -6.17 dB
2.5 GHz
-18 dB
3
-24 dB
1
-6 dB
4: -2.97 dB
2.5 GHz
-18 dB
2: -7.11 dB
900 MHz
0 dB
3: -20.79 dB
1.8 GHz
21
-6 dB
1: -3.03 dB
642 MHz
10
MHz
100
MHz
3
1
GHz GHz
STOP 3000. 000000 MHz
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LC03-6
PROTECTION PRODUCTS
Applications Information
Device Connection Options for Protection of Two
High-Speed Data Lines
Connection for Differential (Line-to-Line) and
Common Mode Protection (Line-to-Ground)
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.
Connection for Differential Protection
(Line-to-Line)
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 advantage of the isolation of the transformer to suppress
common mode surges. To complete the protection
circuit, the RClamp3304N (or RClamp0504N for 5V
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.
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 compared 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.
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 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 and 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=8/20µs).
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LC03-6
PROTECTION PRODUCTS
Typical Applications
1
8
2
7
3
6
4
5
LC03-6
RClamp3304N
1
8
2
7
3
6
4
5
LC03-6
T1 Line Card Protection (Short-Haul Applications)
1
8
2
7
3
6
4
5
DS3, T3, E3,
or
STS-1
1
8
2
7
3
6
4
5
T3/E3 and STS-1 Protection
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LC03-6
PROTECTION PRODUCTS
Typical Applications (Continued)
LC03-6
LC03-6
ISDN S-Interface Protection
ISDN U-Interface Secondary Protection
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LC03-6
PROTECTION PRODUCTS
Typical Applications (Continued)
10/100 Ethernet Protection
High Speed Driver/Receiver Protection
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LC03-6
PROTECTION PRODUCTS
Applications Information - SPICE Model
0.7 nH
D2
D2
D1
D2
D2
LC03-6 Spice Model
LC03-6 Spice Parameters
 2008 Semtech Corp.
Parameter
Unit
D1 (T VS)
D2 (LCR D)
IS
Amp
1.0E-20
3.98E-13
BV
Volt
7.9
240
VJ
Volt
0.6
0.64
RS
Ohm
0.102
0.048
IB V
Amp
1E-3
1E-3
CJO
Farad
3.4e-9
8.0E-12
TT
sec
2.541E-9
2.541E-9
M
--
0.007
0.022
N
--
1.1
1.1
EG
eV
1.11
1.11
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LC03-6
PROTECTION PRODUCTS
Outline Drawing - SO-8
A
h
D
e
N
h
H
2X E/2
E1 E
1
0.25
L
(L1)
e/2
DETAIL
B
01
A
D
aaa C
SEATING
PLANE
A2 A
C
SEE DETAIL
A
.053
.069
.004
.010
.049
.065
.012
.020
.010
.007
.189 .193 .197
.150 .154 .157
.236 BSC
.050 BSC
.010
.020
.016 .028 .041
(.041)
8
8°
0°
.004
.010
.008
1.75
1.35
0.10
0.25
1.25
1.65
0.51
0.31
0.17
0.25
4.80 4.90 5.00
3.80 3.90 4.00
6.00 BSC
1.27 BSC
0.25
0.50
0.40 0.72 1.04
(1.04)
8
0°
8°
0.10
0.25
0.20
SIDE VIEW
A1
bxN
bbb
DIMENSIONS
INCHES
MILLIMETERS
MIN NOM MAX MIN NOM MAX
A
A1
A2
b
c
D
E1
E
e
h
L
L1
N
01
aaa
bbb
ccc
c
GAGE
PLANE
2
ccc C
2X N/2 TIPS
DIM
C A-B D
NOTES:
1.
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
4. REFERENCE JEDEC STD MS-012, VARIATION AA.
Land Pattern - SO-8
X
DIM
(C)
G
C
G
P
X
Y
Z
Z
Y
DIMENSIONS
INCHES
MILLIMETERS
(.205)
.118
.050
.024
.087
.291
(5.20)
3.00
1.27
0.60
2.20
7.40
P
NOTES:
1.
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
2. REFERENCE IPC-SM-782A, RLP NO. 300A.
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LC03-6
PROTECTION PRODUCTS
Ordering Information
Par t
Number
Lead Finish
Qty per
Reel
R eel Size
LC03-6.TB
SnPb
500
7 Inch
LC03-6.TBT
Pb free
500
7 Inch
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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