PROTECTION PRODUCTS
1www.semtech.com
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
Bidirectional TVS Array
for Protection of Five Lines
300 watts peak pulse power (tp = 8/20µs)
Transient protection for data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 12A (8/20µs)
Protects up to 5 bidirectional lines
Low operating voltage
Low clamping voltage
Solid-state silicon avalanche technology
Description Features
Circuit Diagram Schematic and PIN Configuration
Revision 08/15/06
Applications
Mechanical Characteristics
The SMDAxxCN-5 series of transient voltage suppres-
sors are designed to protect components which are
connected to data and transmission lines from voltage
surges caused by electrostatic discharge (ESD), electri-
cal fast transients (EFT), and lightning.
TVS diodes are characterized by their high surge
capability, low operating and clamping voltages, and
fast response time. This makes them ideal for use as
board level protection of sensitive semiconductor
components. The SMDAxxCN-5 is designed to provide
transient suppression on multiple data lines and I/O
ports. The low profile SO-8 design allows the user to
protect up to five data and I/O lines with one package.
The SMDAxxCN-5 TVS diode array will meet the surge
requirements of IEC 61000-4-2 (Formerly IEC 801-2),
Level 4, “Human Body Model” for air and contact
discharge.
SO-8 (Top View)
JEDEC SO-8 package
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code, logo
Packaging : Tube or Tape and Reel per EIA 481
RS-232 Data Lines
RS-423 Data Lines
LAN/WAN Equipment
Servers
Notebook and Desktop PC
Set Top Box
Peripherals
2 2005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
Absolute Maximum Rating
Electrical Characteristics (T=25oC)
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3 2005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
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 5 10 15 20 25 30
Time (µs)
Percent of IPP
e-t
td = IPP/2
Waveform
Parameters:
tr = 8µs
td = 20µs
Pulse Waveform Clamping Voltage vs. Peak Pulse Current
0.01
0.1
1
10
0.1 1 10 100 1000
Pulse Duration - tp (µs)
Peak Pulse Power - PPk (kW)
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150 175
Ambient Temperature - TA (oC)
% of Rated Power or I
PP
0
5
10
15
20
25
30
35
0 2 4 6 8 1012141618202224
Peak Pulse Current - IPP (A)
Clamping Voltage - VC (V)
SMDA15CN-5
SMDA05CN-5
Waveform
Parameters:
tr = 8µs
td = 20µs
4 2005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
Protection for Four Bidirectional Lines
Protection for Five Bidirectional Lines
Device Connection Options for Protection of Four or
Five Data Lines
The SMDAxxCN-5 can be configured to protect either
four or five bidirectional data lines. The options for
connecting the devices are as follows:
1. Bidirectional protection of four I/O lines is achieved
by connecting pins 1, 2, 3, and 4 to the data lines.
Pins 5, 6, 7, and 8 are connected to ground. The
ground connection should be made directly to the
ground plane for best results. The path length is
kept as short as possible to reduce the effects of
parasitic inductance in the board traces. In this
configuration, the device can withstand the maxi-
mum specified transient impulse on four lines
simultaneously.
2. Bidirectional protection of five I/O lines is achieved
by connecting pins 1, 2, 3, 4, and 5 to the data
lines. Pins 6, 7, and 8 are connected to ground.
The ground connection should be made directly to
the circuit board ground plane for best results. In
this configuration, the device can withstand the
maximum rated transient impulse on any two lines
simultaneously.
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
zPlace the TVS near the input terminals or connec-
tors to restrict transient coupling.
zMinimize the path length between the TVS and the
protected line.
zMinimize all conductive loops including power and
ground loops.
zThe ESD transient return path to ground should be
kept as short as possible.
zNever run critical signals near board edges.
zUse ground planes whenever possible.
From Connecto
r
To Protected IC
From Connecto
r
To Protected IC
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.
5 2005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
Land Pattern - SO-8
Outline Drawing - SO-8
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3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
-B-
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
DATUMS AND TO BE DETERMINED AT DATUM PLANE
NOTES:
1.
2. -A- -H-
REFERENCE JEDEC STD MS-012, VARIATION AA.
4.
.050 BSC
.236 BSC
8
.010
.150
.189
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.193
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8
0.25
1.27 BSC
6.00 BSC
3.90
4.90
-
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3.80
4.80
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4.00
5.00
0.51
(.041)
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1.35
(1.04)
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DIM MIN
MILLIMETERS
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DIMENSIONS
INCHES
MIN MAX MAXNOM
E
(.205) (5.20)
Z
G
Y
P
(C) 3.00
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X
INCHES
DIMENSIONS
Z
P
Y
X
DIM
C
G
MILLIMETERS
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.
6 2005 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SMDA05CN-5 THRU SMDA15CN-5
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
Ordering Information
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Note: Lead-free devices are RoHS/WEEE Compliant
