AOZ8818 Ultra-Low Capacitance TVS Diode General Description Features The AOZ8818 is a transient voltage suppressor array designed to protect high speed data lines from damaging ESD events. ESD protection for high-speed data lines: This device incorporates 16 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 AOZ8818 provides a typical capacitance of 0.3 pF and low insertion loss up to 6GHz providing greater signal integrity, making it ideally suited for high speed data line applications such as Digital TVs, DVD players, Computing, set-top boxes and MDDI applications in mobile computing devices. The AOZ8818 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 -40 °C to +85 °C junction temperature range. – IEC61000-4-2, level 4 (ESD) immunity test – Air discharge: ±15 kV; contact discharge: ±15 kV – IEC61000-4-4 (EFT) 40A (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: 0.3 pF Low clamping voltage Low operating voltage: 3.3V, 5.0 V Applications HDMI 1.4/2.0, USB 3.0, MDDI, SATA ports Monitors and flat panel displays Set-top box Video graphics cards Digital Video Interface (DVI) Notebook computers Typical Application I/O1 I/O2 I/O3 I/O4 Rev. 2.0 January 2015 www.aosmd.com Page 1 of 9 AOZ8818 Ordering Information Part Number Ambient Temperature Range Package Environmental -40 °C to +85 °C 2.5 mm x 1.0 mm x 0.55 mm DFN-10 RoHS Compliant Green Product AOZ8818DI-03 AOZ8818DI-05 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 CH1 1 10 NC CH2 2 9 NC VN 3 8 VN CH3 4 7 NC CH4 5 6 NC DFN-10 (Top View) Absolute Maximum Ratings Exceeding the Absolute Maximum ratings may damage the device. Parameter AOZ8818DI-03 Storage Temperature (TS) -65°C to +150°C ESD Rating per IEC61000-4-2, contact(1) ESD Rating per IEC61000-4-2, air AOZ8818DI-05 ±15 kV (1) ESD Rating per Human Body Model ±15 kV (2) ±24 kV Notes: 1. IEC 61000-4-2 discharge with CDischarge = 150 pF, RDischarge = 330 Ω. 2. Human Body Discharge per MIL-STD-883, Method 3015 CDischarge = 100 pF, RDischarge = 1.5 kΩ. Maximum Operating Ratings Parameter Rating Junction Temperature (TJ) Rev. 2.0 January 2015 -40 °C to +125 °C www.aosmd.com Page 2 of 9 AOZ8818 Electrical Characteristics TA = 25°C unless otherwise specified. Specifications in BOLD indicate a temperature range of -40 °C to +85 °C. Symbol IPP VCL(3) VRWM(4) IR Parameter Symbol Maximum Reverse Peak Leakage Current VBR (5) Parameter Breakdown Voltage Clamping Voltage @ IPP IT Test Current Working Peak Reverse Voltage CJ Max. Capacitance @ VR = 0 and f = 1 MHz Maximum Reverse Leakage Current VRWM (V) Max. VBR (V) Min. IT = 10 µA Device Device Marking AOZ8818DI-03 G 3.3 3.5 AOZ8818DI-05 E 5.0 6.0 Notes: 3. Measurements performed using a 100 ns Transmission Line Pulse (TLP) system. VCL Max. IR (µA) Max. CJ (pF) IPP = 1 A IPP = 12 A 1.0 5 17.5 0.30 0.45 1.0 6 18 0.30 0.45 Typ. Max 5. VBR is measured at the pulse test current IT. 4. The working peak reverse voltage, VRWM, should be equal to or greater than the DC or continuous peak operating voltage level. Rev. 2.0 January 2015 www.aosmd.com Page 3 of 9 AOZ8818 Typical Performance Characteristics Forward Voltage vs. Forward Peak Pulse Current 0.00E+00 AOZ8818DI-3 7 -5.00E+00 AOZ8818DI-5 6 -1.00E+01 5 S21 (dB) Forward Voltage (V) I/O – Gnd Insertion Loss (S21) vs. Frequency (tperiod = 100ns, tr = 1ns) 8 4 3 -1.50E+01 -2.00E+01 2 AOZ8818DI-3 -2.50E+01 AOZ8818DI-5 1 -3.00E+01 0 0 2 4 6 8 10 Forward Current, IPP (A) 12 1 14 10000 0 AOZ8818DI-3 AOZ8818DI-3 -20 AOZ8818DI-5 16 Insertion Loss (dB) Clamping Voltage, VCL (V) 1000 Analog Crosstalk (I/O–I/O) vs. Frequency (tperiod = 100ns, tr = 1ns) 18 100 Frequency (MHz) Clamping Voltage vs. Peak Pulse Current 20 10 14 12 10 8 AOZ8818DI-5 -40 -60 -80 -100 6 4 -120 0 2 4 6 8 10 Peak Puse Current, IPP (A) 12 14 1 10 100 1000 10000 Frequency (MHz) Capacitance vs. Frequency (IO to GND) 5E-13 Capacitance (F) 4E-13 3E-13 2E-13 1E-13 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Rev. 2.0 January 2015 www.aosmd.com Page 4 of 9 AOZ8818 Typical Performance Characteristics (Continued) HDMI 1.4 Eye Diagram with AOZ8818 875m Voltage (V) Differential Signal (V) USB3.0 Eye Diagram with AOZ8818 (5Gbps) 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 -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 Unit Intervals -875m 0 Time (s) 898p HDMI 2.0 Eye Diagram with AOZ8818 Voltage (V) 600m -600m 0 Rev. 2.0 January 2015 Time (s) www.aosmd.com 300p Page 5 of 9 AOZ8818 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 AOZ8808DI devices should be located as close as possible to the noise source. The AOZ8808DI 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 AOZ8808DI 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 AOZ8808DI 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 AOZ8808DI 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 AOZ8808DI is designed for ease of PCB layout by allowing the traces to run underneath the device. The pinout of the AOZ8808DI is designed to simply drop onto the IO lines of a High Definition Multimedia Interface (HDMI 1.4/2.0) or USB 3.0 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. Clock Clock SSRX+ SSRX+ Data0 Data0 SSRX– SSRX– Ground Ground Ground Data1 Data1 SSTX+ SSTX+ Data2 Data2 SSTX– SSTX– Ground Figure 3. Flow Through Layout for HDMI 1.4/2.0 Rev. 2.0 January 2015 www.aosmd.com Figure 4. Flow Through Layout for USB 3.0 Page 6 of 9 AOZ8818 Package Dimensions, DFN 2.5mm x 1.0mm x 0.55mm, 10L D b1 b e E L TOP VIEW Pin #1 Dot by Marking 5 1 e Pin #3 Identification R 0.130 BOTTOM VIEW c A SIDE VIEW A1 Dimensions in millimeters RECOMMENDED LAND PATTERN 0.10 0.50 0.30 0.15 0.36 0.48 0.72 1.20 0.24 Symbols A A1 b b1 c D E e L Min. 0.50 0.00 0.15 Nom. 0.55 — 0.20 0.40 0.152 Ref. 2.45 2.50 0.95 1.00 0.50 BSC 0.33 0.38 Max. 0.60 0.05 0.25 2.55 1.05 0.43 Dimensions in inches Symbols A A1 b b1 c D E e L Min. 0.020 0.000 0.006 Nom. Max. 0.022 0.024 — 0.002 0.008 0.010 0.016 0.006 Ref. 0.096 0.098 0.100 0.037 0.039 0.041 0.020 BSC 0.013 0.015 0.017 0.20 0.40 Note: 1. Controlling dimension is millimeter. Converted inch dimensions are not necessarily exact. Rev. 2.0 January 2015 www.aosmd.com Page 7 of 9 AOZ8818 Tape and Reel Dimensions, DFN 2.5mm x 1.0mm x 0.55mm, 10L Carrier Tape P2 P1 D0 D1 E1 K0 E2 E B0 Ref 5 P0 T A0 A–A Feeding Direction UNIT: mm Package DFN 2.5x1.0 B0 2.62 0.05 A0 1.12 0.05 K0 0.70 0.05 D0 D1 E ø1.55 ø0.55 8.00 0.05 0.05 +0.3/-0.1 Reel E1 1.75 0.1 E2 3.50 0.05 P0 4.00 0.10 P1 P2 2.0 0.05 4.0 0.10 T 0.25 0.05 W1 S M K N G R H W UNIT: mm Tape Size Reel Size 8mm ø178 M ø178.0 1.0 N ø60.0 0.5 W 11.80 0.5 W1 9.0 0.5 H ø13.0 +0.5 / –0.2 S 2.40 0.10 K 10.25 0.2 E ø9.8 R — Leader / Trailer & Orientation Trailer Tape 300mm Min. Rev. 2.0 January 2015 Components Tape Orientation in Pocket www.aosmd.com Leader Tape 500mm Min. Page 8 of 9 AOZ8818 Part Marking AOZ8818DI-03 (2.5 x 1.0 DFN) GC12 Assembly Lot Code Week and Year Code Part Number Code AOZ8818DI-05 (2.5 x 1.0 DFN) EC12 Assembly Lot Code Week and Year Code Part Number Code LEGAL DISCLAIMER Alpha and Omega Semiconductor makes no representations or warranties with respect to the accuracy or completeness of the information provided herein and takes no liabilities for the consequences of use of such information or any product described herein. Alpha and Omega Semiconductor reserves the right to make changes to such information at any time without further notice. This document does not constitute the grant of any intellectual property rights or representation of non-infringement of any third party’s intellectual property rights. LIFE SUPPORT POLICY ALPHA AND OMEGA SEMICONDUCTOR PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS. 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. Rev. 2.0 January 2015 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. www.aosmd.com Page 9 of 9