BST143A053U
Transient Voltage Suppressors
BST143A053U
ROHS
Features
100 Watts Peak Power per Line (tp = 8/20μs)
Protects two I/O lines
Low operating voltage: 5V
Ultra Low capacitance(<1.5pF) for high-speed interfaces
Solid-state technology
IEC COMPATIBILITY (EN61000-4)
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 4A (8/20μs)
Mechanical Characteristics
JEDEC SOT-143 package
Molding compound flammability rating:
UL
94V-0
Marking : Making Code
Packaging : Tape and Reel per EIA 481
RoHS/WEEE Compliant
Applications
10/100 Ethernet
FireWire
& USB
Sensitive Analog Inputs
Portable Electronics
LAN/WAN
equipment
Video Line Protection
Microcontroller Input Protection
Circuit Diagram
Schematic & PIN Configuration
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BST143A053U
Transient Voltage Suppressors
Absolute Maximum Rating
Rating
Peak Pulse Power（t
p
=8/20μs）
Peak Pulse Current（t
p
=8/20μs）
Lead Soldering Temperature
Operating Temperature
Storage Temperature
Symbol
P
PP
I
PP
T
L
T
J
T
STG
Value
100
4
260(10sec)
-55 to + 125
-55 to +150
Units
Watts
A
℃
℃
℃
BST143A053U
ROHS
Electrical Parameters (T=25℃)
Symbol
I
PP
V
C
V
RWM
I
R
V
BR
Parameter
Maximum Reverse Peak Pulse Current
Clamping Voltage @
I
PP
Working Peak Reverse Voltage
Maximum Reverse Leakage Current @
V
RWM
Breakdown Voltage @
I
T
Electrical Characteristics
BST143A053U
Parameter
Reverse Stand-Off Voltage
Punch-Through Voltage
Reverse Leakage Current
Clamping Voltage
Clamping Voltage
Symbol
V
RWM
V
PT
I
R
V
C
V
C
I
PT
=2µA
V
RWM
=5V,T=25
℃
I
PP
=1A,tp=8/20
μs
I
PP
=12A,tp=8/20
μs
Between I/O pins and
Ground V
R
=0V, f=1MH
Z
Between I/O pins V
R
=0V,
f=1MH
Z
0.8
0.4
6.0
1.0
9.8
25
1.0
0.6
Conditions
Minimum
Typical
Maximum
5.0
Units
V
V
μA
V
V
pF
pF
Junction Capacitance
C
j
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BST143A053U
Transient Voltage Suppressors
BST143A053U
ROHS
Typical Characteristics
P
pp
– Peak Pulse Power - Ppp(KW)
10
110
100
90
80
70
60
50
40
30
20
10
0
1
0.1
0.01
Percent of Rated Power for I
pp
t
d
– Pulse Duration - µs
Ambient Temperature - T
A
( )
110
100
90
.
Clamping Voltage -Vc(V)
Waveform
Paramters
tr=8µs
td=20µs
20
18
16
14
12
10
8
6
4
2
0
0
2
4
6
8
10
12
Percent I
pp
80
70
60
50
40
30
20
10
0
td=Ipp/2
e
-1
Test
Waveform
Paramters
tr=8µs
td=20µs
14
16
18
20
Time (µs)
Peak Pulse Current -Ipp(A)
10
9
1.1
1.0
0.9
0.8
F=1MHz
Forward Voltage -V
F
(V)
8
7
6
5
4
3
2
1
0
Waveform
Paramters:
tr=8µs
td=20µs
Cj(V
R
)/Cj(V
R
=0)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Forward Current -I
F
(A)
Reverse Voltage -V
R
(V)
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BST143A053U
Transient Voltage Suppressors
BST143A053U
ROHS
ApplicationInformaton
Device Connection Options for Protection of Two High-Speed Data Lines
The BST143A053U TVS is designed to protect two data lines from transient over-voltages by clamping them to
a fixed reference. When the voltage on the protected line exceeds the reference voltage (plus diode V
F
)
the steering diodes are forward biased, conducting the transient current away from the sensitive circuitry.
Data lines are at pins 2 and 3. The negative reference (REF1) is connected at pin 1. This pin should be
connected directly to a ground plane on the board for the best results. The path length is kept as short as
possible to minimize parasitic inductance. The reference (REF2) is connected at pin 4. The options for
connecting the positive reference are as follows:
Data Line and Power Supply Protection Using V
CC
as reference
1.
To protect data lines and the power line,
connect pin 4 directly to the
positive supply
rail (). In this configuration the data lines are
referenced to the supply voltage. The
internal TVS diode prevents over- voltage to
the supply rail.
I/O I/O
V
CC
1
4
2
3
2.
The ST143A053U can be isolated from the power
supply by adding a series resistor between pin
4 and V
CC
-A value of 10kΩ is
recommended.
To Protected IC
Data Line Protection with Bias and Power Supply Isolation Resistor
The internal TVS and steering diodes remains
biased, providing the advantage of lower
capacitance.
I/O I/O
V
CC
10K
1
4
3.
In applications
where no positive supply
2
3
reference is available, or complete supply
isolation is desired, the internal TVS may be
used as the reference. In this case, pin 4 is not
connected. The steering diodes will begin to
conduct when the voltage on the
protected line
exceeds the working
voltage of the TVS (plus one
diode drop).
1
4
NC
To Protected IC
Data Line Protection Using Internal TVS Diode as Reference
I/O I/O
2
3
To Protected IC
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BST143A053U
Transient Voltage Suppressors
BST143A053U
ROHS
Typical Applications
HDMI Port Application
HDMI Transmitter
TMDS_D2+
TMDS_D2-
TMDS_D1+
TMDS_D1-
1
4
HDMI Display
TMDS_D2+
TMDS_D2-
TMDS_D1+
TMDS_D1-
1
4
4
1
4
1
2
3
2
3
3
2
3
2
1
4
1
4
4
1
4
1
2
3
2
3
3
2
3
2
TMDS_D0+
TMDS_D0-
TMDS_CK+
TMDS_CK-
TMDS_D0+
TMDS_D0-
TMDS_CK+
TMDS_CK-
TMDS Transmitter
TMDS Recevier
HDMI ports have become standard features on today’s consumer electronics devices, such as digital
TVs, DVD recorders, and set top boxes. The small geometry of a HDMI graphic chip will make it more
susceptible to ESD and cable discharge events. The high-speed transmission requires the protection
device to have low capacitance to maintain signal integrity and low clamping voltage to reduce stress on
the IC. The ’BST143A053U offers full protection against ESD and its low capacitance of 0.6pF, ensures signal
integrity.
BST143A053U on USB2.0 Port Application
The BST143A053U can also be used to protect USB2.0 ports on monitors, computers, peripherals or portable
systems. Each device is able to protect single USB2.0 port. When the voltage on the data lines exceed
the bus voltage (plus one diode drop), the internal diodes are forward biased conducting the transient
current away from the protected controller chip. The TVS diode directs the surge to ground. The TVS
diode also acts to suppress ESD strikes directly on the voltage bus. Thus, both power and data lines are
protected.
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