Page 1
PROTECTION PRODUCTS
PROTECTION PRODUCTS
SL05 THRU SL24
Low Capacitance TVS Diode
For High Speed Data Interfaces
Description
The SL series of TVS arrays are designed to protect
sensitive electronics from damage or latch-up due to
ESD, lightning, and other voltage-induced transient
events. They are available with operating voltages of
5V, 12V, 15V and 24V.
TVS diodes are solid-state devices designed specifically
for transient suppression. They offer desirable characteristics for board level protection including fast response time, low operating and clamping voltage and
no device degradation. The SL series devices feature
a low capacitance, fast switching compensation diode
in series with a standard TVS diode. This effectively
reduces the overall capacitance of the device to less
than 5pF making it an integrated, low capacitance
solution for use on high-speed interfaces.
The SL series devices may be used to meet the immunity requirements of IEC 61000-4-2, level 4.
Features
u Transient protection for high-speed 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 Small package for use in portable electronics
u Two devices will protect one line
u Low capacitance for high-speed data lines
u Working voltages: 5V, 12V, 15V and 24V
u Solid-state silicon avalanche technology
Mechanical Characteristics
u JEDEC SOT23 package
u Molding compound flammability rating: UL 94V-0
u Marking : Marking Code
u Packaging : Tape and Reel per EIA 481
Applications
u High-Speed data lines
u Cellular handsets & accessories
u Universal Serial Bus (USB) port protection
u Portable instrumentation
u LAN/WAN equipment
u Peripherals
Circuit Diagram Schematic & PIN Configuration
1
3
(N.C.)
2
SOT23 Top View
Revision 9/2000
1
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PROTECTION PRODUCTS
PROTECTION PRODUCTS
Absolute Maximum Rating
SL05 THRU SL24
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Electrical Characteristics
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2ã 2000 Semtech Corp.
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PROTECTION PRODUCTS
PROTECTION PRODUCTS
Electrical Characteristics (Continued)
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ã 2000 Semtech Corp.
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Page 4
PROTECTION PRODUCTS
PROTECTION PRODUCTS
Typical Characteristics
SL05 THRU SL24
Non-Repetitive Peak Pulse Power vs. Pulse Time
10
(kW)
PP
1
0.1
Peak Pulse Power - P
0.01
0.1 1 10 100 1000
Pulse Duration - tp (µs)
Pulse Waveform
110
100
90
80
70
PP
60
50
40
Percent of I
30
20
10
0
0 5 10 15 20 25 30
-t
e
Time (µs)
td = IPP/2
Waveform
Parameters:
tr = 8µs
td = 20µs
Power Derating Curve
110
100
90
PP
80
70
60
50
40
30
% of Rated Power or I
20
10
0
0 25 50 75 100 125 150
Ambient Temperature - T
A
(oC)
IEC 61000-4-2 Discharge ParametersESD Pulse Waveform (Per IEC 61000-4-2)
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Page 5
PROTECTION PRODUCTS
PROTECTION PRODUCTS
Applications Information
SL05 THRU SL24
Device Connection for Protection of One High-Speed
Data Line
The SL series devices are designed to protect highspeed data lines. The SLxx utilizes a low capacitance
compensation diode in series with, but in opposite
polarity to a TVS diode in each line to achieve an
effective capacitance of less than 5pF per device.
During a transient event, the internal rectifier must be
forward biased (TVS is reversed biased). Therefore,
each device will only suppress transient events in one
polarity. To achieve protection in both positive and
negative polarity, a second device is connected in antiparallel to the first. On unidirectional lines, a fast
switching steering diode may be used as an alternative
to using two SL devices.
The options for connecting the devices are as follows:
l Low capacitance protection of one high-speed
line: Protection of one unidirectional or bidirectional high-speed line is achieved by connecting two
devices in anti-parallel. Pin 1 of the first device is
connected to the line and pin 2 is connected to
ground (or to a second line for differential protection). Pin 2 of the second device is connected to
line 1 and pin 1 is connected to ground (or line 2)
as shown. Pin 3 is not connected. During positive
duration transients, the first device will conduct
from pin 1 to 2. The steering diode conducts in the
forward direction while the TVS will avalanche and
conduct in the reverse direction. During negative
transients, the second device will conduct in the
same manner. For optimum protection, 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. The path length
between the TVS and the protected line should
also be minimized.
SL Connection Options
Two Devices : Bidirectional or
Unidirectional Line
One Devices with Steering Diode :
Unidirectional Line Only
I/O Line Protection
l Connection Option for Unidirectional Lines Only:
An optional method for protecting unidirectional
(normal signal polarities above ground) lines is to
add a fast switching steering diode in parallel to the
SL TVS. Input/outputs are connected to pin 1 of
the SL device and the cathode of the rectifier. The
anode of the diode and pin 2 of the SL TVS are
connected to ground.
ã 2000 Semtech Corp.
5
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Page 6
PROTECTION PRODUCTS
PROTECTION PRODUCTS
Outline Drawing - SOT23
SL05 THRU SL24
Land Pattern - SOT23
Note 1 : Grid placement courtyard is 8 x 8 elements (4mm x 4mm) in accordance with the international grid detailed in IEC
Publication 97.
6ã 2000 Semtech Corp.
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Page 7
PROTECTION PRODUCTS
PROTECTION PRODUCTS
Marking Codes
SL05 THRU SL24
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50LS50L
21LS21L
51LS51L
42LS42L
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Ordering Information
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CT.50LSV5000,3hcnI7
GT.50LSV5000,01hcnI31
CT.21LSV21000,3hcnI7
GT.21LSV21000,01hcnI31
CT.51LSV51000,3hcnI7
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GT.51LSV51000,01hcnI31
CT.42LSV42000,3hcnI7
GT.42LSV42000,01hcnI31
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.
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