SMDA24C [SEMTECH]
Bidirectional TVS Array for Protection of Four Lines; 双向TVS阵列的保护四行
| 型号： | SMDA24C |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | Bidirectional TVS Array for Protection of Four Lines |
| 文件： | 总7页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SMDA05C THRU SMDA24C
Bidirectional TVS Array
for Protection of Four Lines
PROTECTION PRODUCTS
Features
Description
u 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)
u Bidirectional protection
The SMDAxxC series of TVS arrays are designed to
provide bidirectional protection for sensitive electronics
from damage or latch-up due to ESD, lightning and
other voltage-induced transient events. Each device
will protect four data or I/O lines. They are available
with operating voltages of 5V, 12V, 15V and 24V.
u Small SO-8 package
u Protects four I/O lines
u Working voltages: 5V, 12V, 15V and 24V
u Low leakage current
u Low operating and clamping voltages
u Solid-state silicon avalanche technology
TVS diodes are solid-state devices designed specifically
for transient suppression. They offer desirable charac-
teristics for board level protection including fast re-
sponse time, low operating and clamping voltage and
no device degradation. The low profile SO-8 package
allows the user to protect up to four independent lines
with one package. The SMDAxxC series is suitable
protection for sensitive semiconductors components
such as microprocessors, ASICs, transceivers, trans-
ducers, and CMOS memory.
Mechanical Characteristics
u JEDEC SO-8 package
u Molding compound flammability rating: UL 94V-0
u Marking : Part number, date code, logo
u Packaging : Tube or Tape and Reel per EIA 481
Applications
The SMDAxxC series devices may be used to meet the
ESD immunity requirements of IEC 61000-4-2, level 4
for air and contact discharge.
u Data and I/O Lines
u Microprocessor based equipment
u Notebooks, Desktops, and Servers
u Instrumentation
u LAN/WAN equipment
u Peripherals
u Serial and Parallel Ports
Schematic & PIN Configuration
1
8
2
3
7
6
4
5
SO-8 (Top View)
www.semtech.com
Revision 9/2000
1
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Absolute Maximum Rating
Rating
Peak Pulse Power (tp = 8/20µs)
ESD Voltage (HBM per (IEC 61000-4-2)
Lead Soldering Temperature
Operating Temperature
Symbol
Value
300
Units
Watts
kV
Ppk
>25
TL
TJ
260 (10 sec.)
-55 to +125
-55 to +150
°C
°C
Storage Temperature
TSTG
°C
Electrical Characteristics
SMDA05C
Parameter
Reverse Stand-Off Voltage
Reverse Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
Symbol
Conditions
Minimum
Typical
Maximum
Units
VRWM
VBR
IR
5
V
V
It = 1mA
6
VRWM = 5V, T=25°C
IPP = 1A, tp = 8/20µs
IPP = 5A, tp = 8/20µs
tp = 8/20µs
20
9.8
11
µA
V
VC
Clamping Voltage
VC
V
Maximum Peak Pulse Current
Junction Capacitance
IPP
17
A
Cj
VR = 0V, f = 1MHz
350
pF
SMDA12C
Parameter
Symbol
VRWM
VBR
IR
Conditions
Minimum
Typical
Maximum
Units
Reverse Stand-Off Voltage
Reverse Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
12
V
V
It = 1mA
13.3
VRWM = 12V, T=25°C
IPP = 1A, tp = 8/20µs
IPP = 5A, tp = 8/20µs
tp = 8/20µs
1
19
24
µA
V
VC
Clamping Voltage
VC
V
Maximum Peak Pulse Current
Junction Capacitance
IPP
12
120
A
Cj
VR = 0V, f = 1MHz
pF
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ã 2000 Semtech Corp.
2
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Electrical Characteristics (Continued)
SMDA15C
Parameter
Reverse Stand-Off Voltage
Reverse Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
Symbol
VRWM
VBR
IR
Conditions
Minimum
Typical
Maximum
Units
15
V
V
It = 1mA
16.7
VRWM = 15V, T=25°C
IPP = 1A, tp = 8/20µs
IPP = 5A, tp = 8/20µs
tp = 8/20µs
1
µA
V
VC
24
30
10
75
Clamping Voltage
VC
V
Maximum Peak Pulse Current
Junction Capacitance
IPP
A
Cj
VR = 0V, f = 1MHz
pF
SMDA24C
Parameter
Symbol
VRWM
VBR
IR
Conditions
Minimum
Typical
Maximum
Units
Reverse Stand-Off Voltage
Reverse Breakdown Voltage
Reverse Leakage Current
Clamping Voltage
24
V
V
It = 1mA
26.7
VRWM = 24V, T=25°C
IPP = 1A, tp = 8/20µs
IPP = 5A, tp = 8/20µs
tp = 8/20µs
1
43
55
5
µA
V
VC
Clamping Voltage
VC
V
Maximum Peak Pulse Current
Junction Capacitance
IPP
A
Cj
VR = 0V, f = 1MHz
50
pF
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ã 2000 Semtech Corp.
3
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
10
110
100
90
80
70
60
50
40
30
20
10
0
1
0.1
0.01
0
25
50
75
100
125
150
0.1
1
10
100
1000
Ambient Temperature - TA (oC)
Pulse Duration - tp (µs)
Pulse Waveform
110
100
90
80
70
60
50
40
30
20
10
0
Waveform
Parameters:
tr = 8µs
td = 20µs
e-t
td = IPP/2
0
5
10
15
20
25
30
Time (µs)
ESD Pulse Waveform (IEC 61000-4-2)
IEC 61000-4-2 Discharge Parameters
Level
First
Peak
Peak
Test
Test
Peak
Current
Current
Voltage
(Contact
Voltage
(Air
Current at 30 ns at 60 ns
Discharge) Discharge)
(A)
7.5
(A)
4
(A)
8
(kV)
(kV)
1
2
3
4
2
2
15
22.5
30
8
4
6
8
4
6
8
4
8
12
16
15
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ã 2000 Semtech Corp.
4
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Four Data Lines
Circuit Diagram
The SMDAxxC series devices are designed to protect
up to four data lines. The devices are connected as
follows:
1
8
l
The SMDAxxC are bidirectional devices and are
designed for use on lines where the normal operat-
ing voltage is above and below ground. Pins 1, 2,
3, and 4 are connected to the protected lines.
Pins 5, 6, 7, and 8 are connected to ground. Since
the device is electrically symmetrical, these connec-
tions may be reversed. 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 induc-
tance in the board traces.
2
3
7
6
4
5
I/O Line Protection
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:
l
l
l
l
Place the TVS near the input terminals or connec-
tors 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.
l
l
Never run critical signals near board edges.
Use ground planes whenever possible.
Typical Connection
To Protected
Device
1
2
8
7
Ground
3
4
6
5
From Connector
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ã 2000 Semtech Corp.
5
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Outline Drawing - SO-8
Land Pattern - SO-8
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ã 2000 Semtech Corp.
6
SMDA05C THRU SMDA24C
PROTECTION PRODUCTS
Ordering Information
Working
Voltage
Qty per
Part Number
Reel Size
Reel
500
500
500
500
SMDA05C.TB
SMDA12C.TB
SMDA15C.TB
SMDA24C.TB
5V
7 Inch
7 Inch
7 Inch
7 Inch
12V
15V
24V
Note:
(1) No suffix indicates tube pack.
(2) Consult factory for availability of 13 Inch reels.
Contact Information
Semtech Corporation
Protection Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
www.semtech.com
ã 2000 Semtech Corp.
7
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