Rev. 2.0 March 2017 www.aosmd.com Page 1 of 10
AOZ8809ADI
Ultra-Low Capacitance TVS Diode
General Description
The AOZ8809ADI is a transient voltage suppressor array
designed to protect high speed data lines such as HDMI
1.4/2.0, USB 3.0/3.1, MDDI, SATA, and Gigabit Ethernet
from damaging ESD events.
This device incorporates eight surge rated, low
capacitance steering diodes and a TVS in a single
package. During transient conditions, the steering diodes
direct the transient to either the positive side of the power
supply line or to ground.
The AOZ8809ADI provides a typical line-to-line
capacitance of 0.25 pF and low insertion loss up to 6GHz
providing greater signal integrity making it ideally suited
for HDMI 1.4/2.0 or USB 3.0/3.1 applications, such as
Digital TVs, DVD players, computing, set-top boxes and
MDDI applications in mobile computing devices.
The AOZ8809ADI comes in a RoHS compliant and
Halogen Free 2.5 mm x 1.0 mm x 0.55 mm DFN-10
package and is rated for -40°C to +85°C junction
temperature range.
Features
ESD protection for high-speed data lines:
IEC 61000-4-2, level 4 (ESD) immunity test
Air discharge: ±15 kV; contact discharge: ±15 kV
IEC61000-4-4 (EFT) 40 A (5/50 ns)
IEC61000-4-5 (Lightning) 4 A (8/20 μs)
Human Body Model (HBM) ±24 kV
Array of surge rated diodes with internal TVS diode
Small package saves board space
Protects four I/O lines
Low capacitance between I/O lines: 0.25 pF
Low clamping voltage
Low operating voltage: 3.3V, 5.0 V
Applications
HDMI 1.4/2.0, USB 3.0/3.1, MDDI, SATA ports
Monitors and flat panel displays
Set-top box
Video graphics cards
Digital Video Interface (DVI)
Notebook computers
Typical Applications
Figure 1. USB 3.0/3.1 Ports Figure 2. HDMI 1.4/2.0 Ports
AOZ8809ADI
AOZ8809ADI
TX2+
TX2-
TX1+
TX1-
TX0+
TX0-
CLK+
CLK-
HDMI 1.4/2.0
Transmitter
RX2+
RX2-
RX1+
RX1-
RX0+
RX0-
CLK+
CLK-
HDMI 1.4/2.0
Receiver
Connector Connector
AOZ8809ADI
AOZ8809ADI
AOZ8802A
AOZ8809
D+
D-
SSRX+
SSRX-
SSTX+
SSTX-
USB 3.0/3.1
Transceiver
D+
D-
SSRX+
SSRX-
SSTX+
SSTX-
USB 3.0/3.1
Connector
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 2 of 10
Ordering Information
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information.
Pin Configuration
Absolute Maximum Ratings
Exceeding the Absolute Maximum ratings may damage the device.
Notes:
1. IEC 61000-4-2 discharge with CDischarge = 150pF, RDischarge = 330 Ω.
2. Human Body Discharge per MIL-STD-883, Method 3015 CDischarge = 100 pF, RDischarge = 1.5 kΩ.
Maximum Operating Ratings
Part Number Ambient Temperature Range Package Environmental
AOZ8809ADI-03 -40 °C to +85 °C 2.5 mm x 1.0 mm x 0.55 mm DFN-10 Green Product
AOZ8809ADI-05
1
2
3
4
5
10
9
8
7
6
CH1
CH2
VN
CH3
CH4
NC
NC
VN
NC
NC
DFN-10
(Top View)
Parameter AOZ8809ADI-03 AOZ8809ADI-05
Storage Temperature (TS) -65 °C to +150 °C
ESD Rating per IEC61000-4-2, contact(1)(3) ±15 kV
ESD Rating per IEC61000-4-2, air(1)(3) ±15 kV
ESD Rating per Human Body Model(2)(3) ±24 kV
Parameter Rating
Junction Temperature (TJ) -40 °C to +125 °C
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 3 of 10
Electrical Characteristics
TA = 25°C unless otherwise specified.
AOZ8809ADI-03
Symbol Parameter Conditions Min. Typ. Max. Units
VRWM Reverse Working Voltage I/O Pin to ground 3.3 V
VBR Reverse Breakdown Voltage IT=100μA, I/O Pin to ground 3.5 V
IRReverse Leakage Current VRWM=3.3V, I/O Pin to ground 1 μA
VFForward Voltage IF=15mA 0.85 V
VHOLD Hold Voltage of Snapback(3) 0.8 V
IHOLD Hold Current of Snapback(3) 3mA
VCL Clamping Voltage(3)(4)
(100ns Transmission Line Pulse,
I/O Pin to ground)
ITLP=1A 3.5
ITLP=12A 8.0
RDNY Dynamic Resistance(3) ITLP=1A to 12A 0.35 Ω
CJJunction Capacitance VPIN 3,8=0V, VI/O=0V, f=1MHz, I/O
Pin to ground
0.45 0.6 pF
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 4 of 10
Notes:
3. These specifications are guaranteed by design and characterization.
4. Measurements performed using a 100ns Transmission Line Pulse (TLP) system.
AOZ8809ADI-05
Symbol Parameter Conditions Min. Typ. Max. Units
VRWM Reverse Working Voltage I/O Pin to ground 5.0 V
VBR Reverse Breakdown Voltage IT=100μA, I/O Pin to ground 6.0 V
IRReverse Leakage Current VRWM=3.3V, I/O Pin to ground 1 μA
VFForward Voltage IF=15mA 0.85 V
VHOLD Hold Voltage of Snapback(3) 0.8 V
IHOLD Hold Current of Snapback(3) 3.5 mA
VCL Clamping Voltage(3)(4)
(100ns Transmission Line Pulse,
I/O Pin to ground)
ITLP=1A 4.0 V
ITLP=12A 9.0 V
RDNY Dynamic Resistance(3) ITLP=1A to 12A 0.35 Ω
CJJunction Capacitance VPIN 3,8=0V, VI/O=0V, f=1MHz, I/O
Pin to ground
0.45 0.6 pF
Rev. 2.0 March 2017 www.aosmd.com Page 5 of 10
AOZ8809ADI
Typical Performance Characteristics
(tperiod = 100ns, tr = 1ns)
Positive TLP Clamping
TLP Voltage (V)
0
5
10
15
20
25
30
0 2 4 6 8 10 12
TLP Current (A)
(tperiod = 100ns, tr = 1ns)
Negative TLP Clamping
Frequency (MHz)
1E-12
8E-13
6E-13
4E-13
2E-13
0
500 1000
Capacitance (F)
Typical Variation of CIN vs. VIN
Input Voltage (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
00 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Capacitance (pF)
Capacitance vs. Frequency
(IO to GND)
1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
AOZ8809ADI-3
AOZ8809ADI-5
-30
-25
-20
-15
-10
-5
0
TLP Current (A)
TLPVoltage (V)
-25 -20 -15 -10 -5 0
+8kV ESD Clamping Per IEC 61000-4-2
(Contact, Between IO to GND)
Time (ns)
55
45
35
25
15
5
-5
0 25 50 75 100 125 150
Clamping Voltage (V)
-8kV ESD Clamping Per IEC 61000-4-2
(Contact, Between IO to GND)
Time (ns)
5
-5
-15
-25
-35
-45
-55
0 25 50 75 100 125
150
Clamping Voltage (V)
Rev. 2.0 March 2017 www.aosmd.com Page 6 of 10
AOZ8809ADI
Typical Performance Characteristics (Continued)
Insertion Loss vs. Frequency
(IO to GND)
Insertion Loss vs. Frequency
(IO to IO)
Frequency (kHz)
-10
-8
-6
-4
-2
0
10,000 100,000 1,000,000
Insertion Loss S21 (dB)
Frequency (kHz)
-10
-8
-6
-4
-2
0
10,000 100,000 1,000,000
Insertion Loss S21 (dB)
USB 3.0 Eye Diagram with AOZ8809 (5Gbps)
Unit Intervals
Differential Signal (V)
-0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
Time (s)0
-875m
875m
898p
Voltage (V)
HDMI 1.4 Eye Diagram with AOZ8809
Time (s)0
-600m
600m
300p
Voltage (V)
HDMI 2.0 Eye Diagram with AOZ8809
Time (s)-100
-400m
400m
100p
Voltage (V)
USB 3.1 Eye Diagram with AOZ8809 (10Gbps)
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 7 of 10
High Speed PCB Layout Guidelines
Printed circuit board layout is the key to achieving the
highest level of surge immunity on power and data lines.
The location of the protection devices on the PCB is the
simplest and most important design rule to follow. The
AOZ8809ADI devices should be located as close as
possible to the noise source. The AOZ8809ADI device
should be placed on all data and power lines that enter or
exit the PCB at the I/O connector. In most systems, surge
pulses occur on data and power lines that enter the PCB
through the I/O connector. Placing the AOZ8809ADI
devices as close as possible to the noise source ensures
that a surge voltage will be clamped before the pulse can
be coupled into adjacent PCB traces. In addition, the
PCB should use the shortest possible traces. A short
trace length equates to low impedance, which ensures
that the surge energy will be dissipated by the
AOZ8809ADI device. Long signal traces will act as
antennas to receive energy from fields that are produced
by the ESD pulse. By keeping line lengths as short as
possible, the efficiency of the line to act as an antenna for
ESD related fields is reduced. Minimize interconnecting
line lengths by placing devices with the most interconnect
as close together as possible. The protection circuits
should shunt the surge voltage to either the reference or
chassis ground. Shunting the surge voltage directly to the
IC’s signal ground can cause ground bounce. The
clamping performance of TVS diodes on a single ground
PCB can be improved by minimizing the impedance with
relatively short and wide ground traces. The PCB layout
and IC package parasitic inductances can cause
significant overshoot to the TVS’s clamping voltage. The
inductance of the PCB can be reduced by using short
trace lengths and multiple layers with separate ground
and power planes. One effective method to minimize
loop problems is to incorporate a ground plane in the
PCB design.
The AOZ8809ADI ultra-low capacitance TVS is designed
to protect four high speed data transmission lines from
transient over-voltages by clamping them to a fixed
reference. The low inductance and construction
minimizes voltage overshoot during high current surges.
When the voltage on the protected line exceeds the
reference voltage the internal steering diodes are forward
biased, conducting the transient current away from the
sensitive circuitry. The AOZ8809ADI is designed for ease
of PCB layout by allowing the traces to run underneath
the device. The pinout of the AOZ8809ADI is designed to
simply drop onto the IO lines of a High Definition
Multimedia Interface (HDMI 1.4/2.0) or USB 3.0/3.1
design without having to divert the signal lines that may
add more parasitic inductance. Pins 1, 2, 4 and 5 are
connected to the internal TVS devices and pins 6, 7, 9
and 10 are no connects. The no connects was done so
the package can be securely soldered onto the PCB
surface.
Figure 3. Flow Through Layout for HDMI 1.4/2.0 Figure 4. Flow Through Layout for USB 3.0/3.1
.
Clock
Data0
Ground
Data1
Data2
Clock
Data0
Ground
Data1
Data2
SSRX+
SSRX–
Ground
SSTX+
SSTX–
SSRX+
SSRX–
Ground
SSTX+
SSTX–
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 8 of 10
Package Dimensions, DFN 2.5mm x 1.0mm x 0.5mm, 10L
Note:
4. Controlling dimension is millimeter. Converted inch dimensions are not necessarily exact.
E
Pin #1 Dot
by Marking
A
A1
c
0.30 0.50 0.10
0.15
0.36
0.72
0.40
0.20
1.20 0.24
0.48
D
RECOMMENDED LAND PATTERN
SIDE VIEW
TOP VIEW
BOTTOM VIEW
1
2
e
Nd
b
R
L
10
b2
b1
L1
L2
Nd
0.13
0.08 0.18
R
2.45 2.50 2.55
0.95
Symbol
Dimensions in Millimeters
b
0.15
0.10 0.20
D
A
E
0.50BSC
e
1.05
1.00
0.02 0.05
A1 __
0.25
0.15 0.20
c
0.600.50
2.00BSC
b1 0.45
0.35 0.40
0.33 0.43
L
b2 0.30
0.20 0.25
0.075REF
L1
0.05REF
L2
0.55
Min. Nom. Max. Min. Nom. Max.
Dimensions in Inches
0.02360.0196 0.0216
0.0019
0.0007
0.00980.0059 0.0078
0.01770.0137 0.0157
0.0078
0.0039
0.0964
0.0098
0.0059
0.0984
0.0118
0.0078
0.1003
__
0.0374 0.0393 0.0413
0.0129 0.0169
0.0031 0.0051 0.0071
0.0196BSC
0.0787BSC
0.0295REF
0.0197REF
0.38 0.0150
Rev. 2.0 March 2017 www.aosmd.com Page 9 of 10
AOZ8809ADI
Tape and Reel Dimensions, DFN 2.5mm x 1.0mm x 0.5mm, 10L
Carrier Tape
Reel
A–A
Leader
/
Trailer & Orientation
Tape Size
8mm
Reel Size
ø178
M
ø178.0
1.0
Package
DFN 2.5x1.0
T
0.25
0.05
B0
2.62
0.05
A0
1.12
0.05
K0
0.70
0.05
D0
ø1.55
0.05
D1
ø0.55
0.05
E1
1.75
0.1
E
8.00
+0.3/-0.1
E2
3.50
0.05
P0
4.00
0.10
P1
4.0
0.10
P2
2.0
0.05
N
ø60.0
0.5
Trailer Tape
300mm Min.
Components Tape
Orientation in Pocket
Leader Tape
500mm Min.
E1
E2 E
T
R
G
UNIT: mm
UNIT: mm
Feeding Direction
W
11.80
0.5
H
ø13.0
+0.5 / –0.2
W1
9.0
0.5
S
2.40
0.10
K
10.25
0.2
E
ø9.8
R
W1
M
W
N
H
SK
Ref 5
B0
K0
P1
P2
D0 D1
P0 A0
AOZ8809ADI
Rev. 2.0 March 2017 www.aosmd.com Page 10 of 10
Part Marking
XC12
Part Number Code Assembly Lot Code
Week and Year Code
AOZ8809ADI-03
(2.5 x 1.0 DFN)
VC12
Part Number Code Assembly Lot Code
Week and Year Code
AOZ8809ADI-05
(2.5 x 1.0 DFN)
As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant into
the body or (b) support or sustain life, and (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of
the user.
2. A critical component in any component of a life
support, device, or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
LIFE SUPPORT POLICY
ALPHA AND OMEGA SEMICONDUCTOR PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS.
LEGAL DISCLAIMER
Applications or uses as critical components in life support devices or systems are not authorized. AOS does not
assume any liability arising out of such applications or uses of its products. AOS reserves the right to make
changes to product specifications without notice. It is the responsibility of the customer to evaluate suitability of the
product for their intended application. Customer shall comply with applicable legal requirements, including all
applicable export control rules, regulations and limitations.
AOS' products are provided subject to AOS' terms and conditions of sale which are set forth at:
http://www.aosmd.com/terms_and_conditions_of_sale