Document: W0301004, Rev: C US2.8-4LVU Transient Voltage Suppressor Features z 400 Watts peak pulse power (tp=8/20μs) z Protects Two Line Pairs (Four lines) z Low capacitance z Low leakage current z Low operating and clamping voltage z Solid-state Punch through Avalanche TVS process technology SO-8 IEC COMPATIBILITY (EN61000-4) z IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) z IEC 61000-4-4 (EFT) 40A (5/50ns) z IEC 61000-4-5 (Lightning) 24A (8/20μs) Mechanical Characteristics Applications z JEDEC SO-8 package z Molding compound flammability rating: UL 94V-0 z Marking: Marking Code z Packaging: Tape and Reel z RoHS/WEEE Compliant z Switching Systems z WAN/LAN Equipment z Desktops, Serves, Notebooks& Handhelds z 10/100 Ethernet z Base Stations z Audio/Video Inputs Schematic & PIN Configuration SO-8 (Top View) ©2008 WAYON Corporation www .way-on.com 1/8 US2.8-4LVU SilicontrolTM Overvoltage Protection Products Absolute Maximum Rating Rating Sy mbol Value Units Peak Pulse Power（tp=8/20μs） see Figure1& Figure2 PPP 400 Watts Peak Pulse Current（tp=8/20μs） IPP 24 A Lead Soldering Temperature TL 260(10sec) °C Operating Temperature TJ -55 to + 125 °C TSTG -55 to +150 °C Storage Temperature Electrical Parameters (T=25℃) Symbol Parameter IPP Maximum Reverse Peak Pulse Current VC Clamping Voltage @ IPP VRWM IR Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM VPT Punch-through Breakdown Voltage @ IT V Snap-Back Voltage @ I I SB Snap-Back Current IPT Test Current VPTF Forward Punch-through Breakdown Voltage @ IF IPTF Forward Test Current SB SB Electrical Characteristics(T=25℃) WS2.8-4LVU Parameter Sy mbol Conditions Minimum Reverse Stand-Off Voltage VRWM See Note1 Punch-through Vo ltage VPT IPT=2μA,See Note1 Reverse Leakage Current IR Typical Maximum Units 2.8 V 3.0 VRWM=2.8V V 1 μA See Note1 Snap-Back Voltage ©2008 WAYON Corporation VSB I SB =50mA www ,See Note1 2.8 .way-on.com V US2.8-4LVU SilicontrolTM Overvoltage Protection Products Electrical Characteristics (Cont.) Parameter Sy mbol Clamping Voltage ( Note1) VC Conditions Minimum Typical IPP=2A, tp=8/20μs Maximum Units 6 V 9.5 V 17 V See Note1 Clamping Voltage VC IPP=5A, tp=8/20μs See Note1 Clamping Voltage VC Junction Capacitance Cj IPP=24A, tp=8/20μs See Note1 VR = 0V, f = 1MHz 3. See Note1 pF Steer Diodes Reverse Breakdown Voltage IT =10µA VBR Reverse Leakage Current IR Forward Voltage (Note 3) VF See Note4 50 V RWM = 2.8V See Note4 IF=1A See Note5 V 1 μA 2 V NOTES： 1. Device measured between pin 1 to 2, pin 3 to 4, pin 5 to 6 and pin 7 to 8. 2. The 8/20μs test pulse wave is shown in figure3, and the clamping voltage vs. IPP is shown in figure4 . 3. The Junction Capacitance vs. Reverse Voltage is shown in figure5. 4. Each Steer Diode integrated in the US2.8-4LVU 5. The Forward Voltage vs. Forward Current for Steer diode is shown in figure6. ©2008 WAYON Corporation www reversely connected with a TVS Diode in series .way-on.com 3/8 US2.8-4LVU SilicontrolTM Overvoltage Protection Products Typical Characteristics Figure 2: Power Derating Curve 10 110 400w 8/20µs Waveform 1 100 Percent of Rated Power for Ipp Ppp – Peak Pulse Power - Ppp(KW) Figure 1: Peak Pulse Power vs. Pulse Time 0.1 0.01 90 80 70 60 50 40 30 20 10 0 td – Pulse Duration - µs Ambient Temperature - TA (℃) Figure 4: Clamping Voltage vs. Peak Pulse Current Figure3: Pulse Waveform 110 Ipp Percent Clamping Voltage–VC (V) 90 80 18 Waveform Paramters tr=8µs td=20µs 100 e-1 70 60 50 40 td=Ipp/2 30 20 10 16 14 12 10 8 4 2 0 0 Time (µs) 30 0 5 10 15 20 25 30 Peak Pulse Current–IPP (A) Figure 5: Capacitance vs. Reverse Voltage Figure 6: Forward Voltage vs. Forward Current 16 f=1 MHz 14 Forward Voltage–VF(V) 25 Capacitance–Cj (pF) Test Waveform Paramters tr =8µs td=20µs 6 20 15 10 5 12 Test Waveform Paramters tr=8µs td=20µs 10 8 6 4 2 0 0 0 0.5 1 1.5 2 Reverse Voltage–VR (V) ©2008 WAYON Corporation 2.5 3 0 5 10 15 20 25 30 Forward Current–IF(A) www .way-on.com 4/8 SilicontrolTM Overvoltage Protection Products US2.8-4LVU Application Information The US2.8- 4LVU is designed to pro viding p rotection for electronic equi pment that is susceptible to damage cau sed by Electrostatic Discharg e (ESD) , Elec trical Fast Transients (E FT) and tertiary light ning effects. This product is offered in a unidirectional configurati on and provides both common-mode and differential-mode protection. Unidirectional Common-mode Protection The US2.8-4LVU protects four lines in a common-mo de configuration. z Pin 1 is connected to Line1. z Pin 3 is connected to Line2 z Pin 5 is connected to Line3. z Pin 7 is connected to Line4 z Other Pins are connected to ground. Bidirectional Common-mode Protection The US2.8-4LVU device provide two lines of bidirectional protection in a common-mode configuration. z Pin1 &Pin8 are connected to Line1 z Pin4&Pin5 are connected to Line2 z Other Pins are connected to ground. Bidirectional Differential-mode Protection The US2.8-4LVU device provide four lines of bidirectional protection in a differential-mode configuration. z Pin1 & Pin8 is connected to Line1 z Pin2 & Pin7 is connected to Line2 z Pin3 & Pin6 is connected to Line3 z Pin4 & Pin5 is connected to Line4 z Line1&Line2 compose Line Pair1 ,Line3&Line4 compose Line Pair2 ©2008 WAYON Corporation www .way-on.com 5/8 SilicontrolTM Overvoltage Protection Products U S 2.8-4LVU Main Application 10/100 Ethernet Protection Circuit ©2008 WAYON Corporation www .way-on.com 6/8 SilicontrolTM Overvoltage Protection Products U S 2.8-4LVU Main Application (Cont) “quad” Transformer Gigabit Ethernet Protection Circuit ©2008 WAYON Corporation www .way-on.com 7/8 U S 2.8-4LVU SilicontrolTM Overvoltage Protection Products Outline Drawing – SO-8 PACKAGE OUTLINE DIMENSIONS SYMBOL INCHES MI MIN LIMETER MAX MIN MAX A 0. 054 0.068 1.35 1.75 a1 0. 004 0.008 0.10 0.25 a2 0. 050 0.060 1.25 1.50 D 0. 189 0.196 4.80 5.00 F 0. 150 0.157 3.80 4.00 E 0. 229 0.244 5.80 6.20 e 0. 05BSC 0.05BSC 1.27BSC 1.27BSC L 0. 016 0.049 0.40 1.250 θ 0 10 。 。 0 10 。 Notes 1. This land pattern is for reference purposes only consult your DIMENSIONS DIM INCHES MILLIMETERS C 0.205 5.20 G 0.160 4.06 P 0.050 1.26 X 0.015 0.38 Y 0.045 1.14 Z 0.291 7.40 manufacturing group to ensure your company's manufacturing guidelines are met. 2. Reference ipc-sm-782a.. Marking Codes Part Number U S 2.8-4LVU Marking Code WS 2.8-4LVU ©2008 WAYON Corporation www 。 .way-on.com 8/8