SEMTECH SMDA05-6TB

SMDA05-6
Unidirectional TVS Array
for Protection of Six Lines
PROTECTION PRODUCTS
Description
Features
u 300 watts peak pulse power (tp = 8/20µs)
u Transient protection for data lines to
The SMDA series of transient voltage suppressors are
designed to protect components which are connected
to data and transmission lines from voltage surges
caused by ESD (electrostatic discharge), EFT (electrical
fast transients), and lightning.
u
u
u
u
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 SMDA05-6 is designed to provide
transient suppression on multiple data lines and I/O
ports. It is designed to operate on 5V digital lines. The
low profile SO-8 design allows the user to protect up to
six data and I/O lines with one package.
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 6 unidirectional lines
Low operating voltage
Low clamping voltage
Solid-state silicon avalanche technology
Mechanical Characteristics
u
u
u
u
u
The SMDA05-6 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.
JEDEC SO-8 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code, logo
Packaging : Tube or Tape and Reel per EIA 481
Applications
u
u
u
u
u
u
u
u
Circuit Diagram
5V data & I/O lines
Communication lines
Microprocessor based equipment
LAN/WAN equipment
Servers
Notebook & Desktop PC
Instrumentation
Peripherals
Schematic & PIN Configuration
SO-8 (Top View)
Revision 9/2000
1
www.semtech.com
SMDA05-6
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbo l
Value
Units
Peak Pulse Pow er (tp = 8/20µ s)
Pp k
300
Watts
Peak Pulse Current (tp = 8/20µ s)
I PP
17
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
SMDA05-6
Par ame te r
Symbo l
Co nd itio ns
Minimum
Typ ical
Maximum
Units
5
V
Reverse Stand -Off Voltage
VRWM
Reverse Breakd ow n Voltage
V BR
It = 1mA
Reverse Leakage Current
IR
V RWM = 5V, T=25°C
20
µA
Clamp ing Voltage
VC
IPP = 1A , tp = 8/20µ s
9.8
V
Clamp ing Voltage
VC
IPP = 5A , tp = 8/20µ s
11
V
Maximum Peak Pulse Current
I PP
tp = 8/20µ s
17
A
Junction Cap acitance
Cj
Betw een I/O p ins and
Gnd
V R = 0V, f = 1MHz
400
pF
ã 2000 Semtech Corp.
2
6
V
www.semtech.com
SMDA05-6
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
10
110
90
% of Rated Power or IPP
Peak Pulse Power - P PP (kW)
100
1
0.1
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
0
1000
25
50
100
125
150
Clamping Voltage vs. Peak Pulse Current
Pulse Waveform
11
110
Waveform
Parameters:
tr = 8µs
td = 20µs
90
80
70
e
60
10
Clamping Voltage - VC (V)
100
Percent of IPP
75
Ambient Temperature - TA (oC)
Pulse Duration - tp (µs)
-t
50
40
td = IPP/2
30
20
9
8
7
6
5
4
Waveform
Parameters:
tr = 8µs
td = 20µs
3
2
1
10
0
0
0
5
10
15
20
25
0
30
2
6
8
10
12
14
16
18
IEC 61000-4-2 Discharge Parameters
ESD Pulse Waveform (IEC 61000-4-2)
Level
ã 2000 Semtech Corp.
4
Peak Pulse Current - IPP (A)
Time (µs)
3
First
Peak
Current
Peak
Current
at 30 ns
Peak
Current
at 60 ns
Test
Test
Voltage
Voltage
(Contact
( A ir
Disch arge) Disch arge)
(kV )
(kV )
(A)
(A)
(A)
1
7.5
4
8
2
2
2
15
8
4
4
4
3
22.5
12
6
6
8
4
30
16
8
8
15
www.semtech.com
SMDA05-6
PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Six Data Lines
Circuit Diagram
The SMDA05-6 is designed to protect up to 6 data or
I/O lines operating at 5 volts. They are unidirectional
devices and may be used on lines where the signal
polarities are above ground (i.e. 0 to 5V).
The device is connected as follows:
l
Pins 1, 2, 3, 4, 5 and 8 are connected to the lines
that are to be protected. Pins 6 and 7 are connected to ground. The ground connections 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.
Connection Diagram
Circuit Board Layout Recommendations for Suppression of ESD.
DATA IN
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
l
l
l
l
l
l
Place the TVS near the input terminals or connectors to restrict transient coupling.
Minimize the path length between the TVS and the
protected line.
Minimize all conductive loops including power and
ground loops.
The ESD transient return path to ground should be
kept as short as possible.
Never run critical signals near board edges.
Use ground planes whenever possible.
DATA IN
ã 2000 Semtech Corp.
4
DATA OUT
8
7
6
5
1
2
3
4
DATA OUT
www.semtech.com
SMDA05-6
PROTECTION PRODUCTS
Outline Drawing - SO-8
Land Pattern - SO-8
ã 2000 Semtech Corp.
5
www.semtech.com
SMDA05-6
PROTECTION PRODUCTS
Ordering Information
Par t Numbe r
Wo r king
Vo ltage
Qty p e r
Reel
R e e l Size
SMDA05-6.TB
5V
500
7 Inch
SMDA05-6.TE
5V
2,500
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
ã 2000 Semtech Corp.
6
www.semtech.com