LCDA12C-1, LCDA15C-1 Datasheet by Semtech Corporation

View All Related Products | Download PDF Datasheet
a SEMTECH
PROTECTION PRODUCTS PRELIMINARY
1www.semtech.com
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Low Capacitance TVS Diode Array
Description Features
Circuit Diagram Schematic & PIN Configuration
Revision 01/15/03
The LCDAxxC-1 is a low capacitance transient voltage
suppressor (TVS) diode array. It is designed to protect
sensitive CMOS ICs from the damaging effects of ESD
and lightning. Each device will protect one line in
common (line-to-ground) mode or one line pair in
metallic (Line-to-line) mode. They are low capacitance
(< 15pF) making them suitable for use on high-speed
telecom and datacom interfaces without signal degra-
dation.
The configuration of the LCDAxxC-1 has been optimized
for easy layout on high density boards. The small
SOT-143 package minimizes required board space.
These devices will handle up to 20 Amps for an
8/20µs lightning impulse. The low inductance con-
struction minimizes voltage overshoot during high
current surges.
The LCDAxxC-1 may be used to protect ADSL inter-
faces, multi-protocol serial transceivers, portable
electronics, and wireless systems.
Applications
Mechanical Characteristics
ADSL Interfaces
RS-232, RS-422, V.90 Interfaces
Multi-Protocol Serial Transceivers
High-Speed Data Lines
Portable Electronics
WAN/LAN Equipment
Wireless Systems
Transient protection to high-speed data lines
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 0.5kV, 12A (8/20µs)
Configuration optimized for easy board layout
Protects one line pair
Low capacitance (<15pF) for high-speed interfaces
Low clamping voltage
Low leakage current
Operating voltage: 12V and 15V
Solid-state silicon-avalanche technology
JEDEC SOT-143 package
Molding compound flammability rating: UL 94V-0
Marking : Marking code
Packaging : Tape and Reel per EIA 481
RoHS/WEEE Compliant
SOT-143 (Top View)
Pin 1 and 4
Pin 2 and 3
a SEMTECH
22005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Absolute Maximum Rating
Electrical Characteristics
1-C21ADCL
retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU
egatloVffO-dnatSesreveRV
MWR
21V
egatloVnwodkaerBesreveRV
RB
I
t
Am1=3.31V
tnerruCegakaeLesreveRI
R
V
MWR
C°52=T,V21=5Aµ
egatloVgnipmalCV
C
I
PP
t,A5=
p
sµ02/8=91V
egatloVgnipmalCV
C
I
PP
t,A02=
p
sµ02/8=6.62V
tnerruCesluPkaePI
PP
t
p
sµ02/8=02A
ecnaticapaCnoitcnuJC
j
dnasnipO/IneewteB
dnuorG
V
R
zHM1=f,V0=
851Fp
gnitaRlobmySeulaVstinU
t(rewoPesluPkaeP
p
)sµ02/8=P
kp
005sttaW
erutarepmeTgniredloSdaeLT
L
).ces01(062C°
erutarepmeTgnitarepOT
J
521+ot55-C°
erutarepmeTegarotST
GTS
051+ot55-C°
1-C51ADCL
retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU
egatloVffO-dnatSesreveRV
MWR
51V
egatloVnwodkaerBesreveRV
RB
I
t
Am1=7.61V
tnerruCegakaeLesreveRI
R
V
MWR
C°52=T,V51=5Aµ
egatloVgnipmalCV
C
I
PP
t,A1=
p
sµ02/8=42V
egatloVgnipmalCV
C
I
PP
t,A51=
p
sµ02/8=33V
tnerruCesluPkaePI
PP
t
p
sµ02/8=51A
ecnaticapaCnoitcnuJC
j
dnasnipO/IneewteB
dnuorG
V
R
zHM1=f,V0=
851Fp
a SEMTECH (fir/Hz
32005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS PRELIMINARY
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150
Ambient Temperature - TA (oC)
% of Rated Power or I
PP
Clamping Voltage vs. Peak Pulse Current
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
Pulse Waveform
Capacitance vs. Reverse Voltage
0.01
0.1
1
10
0.1 1 10 100 1000
Pulse Duration - tps)
Peak Pulse Power - Ppk (kW)
7
7.5
8
8.5
9
0123456789101112
Reverse Voltage - VR
(V)
Capacitance - Cj (pF)
f=1MH
z
10
12
14
16
18
20
22
24
26
28
0 5 10 15 20 25
Peak Pulse Current - IPP (A)
Clamping Voltage - VC (V)
Waveform
Parameters:
tr = 8µs
td = 20
µ
s
LCDA15C-1
LCDA12C-1
a SEMTECH fifi ¥ F OIEC www.semlech.com
42005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Applications Information
Device Connection for Metallic Protection of High-
Speed Data Lines
The LCDAxxC-1 is designed to protect high-speed data
lines from transient over-voltages which result from
lightning and ESD. The device is designed to protect
one line in common mode (Line-to-Ground) or one line
pair in metallic (Line-to-Line) mode. For metallic mode
protection, the input of line 1 is connected at pin 1 and
the output is connected at pin 4. Likewise, the input
of line 2 is connected at pin 2 and the output is con-
nected at pin 3. For common mode protection, ground
either pins 1 and 4 or pins 2 and 3. The ground
connection should be made directly to the ground
plane for best results.
ADSL Protection
A typical ADSL protection circuit is shown in Figure
3. The LCDA12C-1 (or LCDA15C-1 for 15 volt drivers)
is connected from each line to ground on the IC side of
the line. They provide lightning and ESD protection for
the sensitive line driver IC.
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
Figure 3 - ADSL Protection Circuit
1
23
4
Line
In
Line
In
Line
Out
Line
Out
Figure 1 - Connection for Differential Protection
(Line-to-Line)
1
23
4
Line
In
Line
Out
Figure 2 - Connection for Common Mode
Protection (Line-to-Ground)
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.
a SEMTECH F 71
52005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS PRELIMINARY
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Land Pattern - SOT-143
Outline Drawing - SOT-143
A
e
12
43
e/2
E1
e1 bxN
bbb C A B
B
A2
aaa C A B
b1
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
NOTES:
OR GATE BURRS.
DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
3.
1.
DATUMS AND TO BE DETERMINED AT DATUM PLANE
REFERENCE JEDEC STD TO-253, VARIATION D.4.
-A- -B-
2. -H-
SIDE VIEW SEE DETAIL A
H
0.25
C
SEATING
PLANE
GAUGE
PLANE 0c
L
L1
DETAIL A
D
E
A1
A
C
SEATING PLANE
ccc C
4X
INCHES
.114
L1
b1
E
D
b
e
c
.011
.003
.082
A1
DIM
A
MIN
.000
.031
0.51
0.20
2.64
0.30
0.08
2.10
(.021)
-
-
.075
-
.093
.020
.008
.104
(0.54)
-
1.92 BSC
-
-
2.37
2.90
MILLIMETERS
MAX
0.15
1.22
MIN
DIMENSIONS
0.013
MAXNOM
-
-.006
.048
NOM
0.80
-
-
3.042.80.110 .120
e1 .008 0.20 BSC
L .015 .020 0.500.40.024 0.60
A2 .029 .035 0.900.75.042 1.07
E1 .051 1.30
0.940.76.037.029
1.401.20
N4 4
0--
.055.047
aaa .006 0.15
bbb .008 0.20
ccc .004 0.10
C
Y
Y
REFERENCE IPC-SM-782A2.
E1
G
Z
X2
E2
NOTES:
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
DIM
Y
Z
E2
G
X1
C
E1
MILLIMETERSINCHES
(2.20)
.055
.141
.076
.039
.031
.068
(.087)
1.40
3.60
1.72
1.00
0.80
1.92
DIMENSIONS
X2 .047 1.20
X1 X1
X1
a SEMTECH
62005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
LCDA12C-1 and LCDA15C-1
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
Ordering Information
rebmuNtraPhsiniFdaeL repytQ
leeR eziSleeR
CT.1-C21ADCLbPnS000,3hcnI7
CT.1-C51ADCLbPnS000,3hcnI7
TCT.1-C21ADCLeerFbP000,3hcnI7
TCT.1-C51ADCLeerFbP000,3hcnI7
Marking Codes
rebmuNtraP gnikraM
edoC
1-C21ADCLL21
1-C51ADCLL51

Products related to this Datasheet

TVS DIODE 12V 26.6V SOT143-4
TVS DIODE 15V 33V SOT143-4
TVS DIODE 12V 26.6V SOT143-4
TVS DIODE 12V 26.6V SOT143-4
TVS DIODE 15V 33V SOT143-4
TVS DIODE 15V 33V SOT143-4