Transient Voltage Suppressors Array for ESD Protection Low Capacitance SLVU2.8-4 Description SO-08 The SLVU2.8-4 is in an SO-08 package and may be used to protect two high-speed line pairs. The “flow-thru” design minimizes trace inductance and reduces voltage overshoot associated with ESD events. The low clamping voltage of the SLVU2.8-4 minimizes the stress on the protected IC. Feature Functional Diagram u 400 Watts Peak Pulse Power per Line (tp=8/20μs) u Protects two line pairs (four lines) u Low capacitance u RoHS Compliant u IEC61000-4-2 (ESD) ±15kV (air), ±8kV (contact) u IEC61000-4-4 (EFT) 40A (5/50ηs) u IEC61000-4-5 (Lightning) 24A (8/20μs) Applications u 10/100/1000 Ethernet u WAN/LAN Equipment u Test & Measurement Equipment u Switching Systems u Instrumentation u Audio/Video Inputs Mechanical Characteristics u JEDEC SO-08 Package u Molding Compound Flammability Rating : UL 94V-0 u Weight 70 Milligrams (Approximate) u Quantity Per Reel : 500pcs u Reel Size : 7 inch u Lead Finish : Lead Free Mechanical Characteristics Symbol Parameter Value Units 400 W PPP Peak Pulse Power (tp=8/20μs waveform) TL Lead Soldering Temperature 260 (10sec) ºC TSTG Storage Temperature Range -55 to +150 ºC Operating Temperature Range -55 to +150 ºC TJ Air Discharge ±15 Contact Discharge ±8 IEC61000-4-2 (ESD) IEC61000-4-4 (EFT) 40 A IEC61000-4-5 ( Lightning ) 24 A SOCAY Electronics Co., Ltd. Revision January 06, 2014 KV www.socay.com 1/4 @ SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Transient Voltage Suppressors Array for ESD Protection Low Capacitance SLVU2.8-4 Electrical Characteristics (@ 25℃ Unless Otherwise Specified ) Part Number Device Marking VRWM (V) (Max.) VB (V) (Min.) IT (mA) VC @5A (Max.) (Max.) SLVU 2.8-4 2.8 3.0 1 8.5 20 SLVU2.8-4 (@A) IR (μA) (Max.) C (pF) (Typ.) 24 5 2 VC Characteristic Curves Fig1. 8/20μs Pulse Waveform Fig2. ESD Pulse Waveform (according to IEC 61000-4-2) tr 100 Peak Value IPP 80 100% TEST WAVEFORM PARAMETERS tr=8μs td=20μs Percent of Peak Pulse Current % IPP - Peak Pulse Current - % of IPP 120 60 40 td=t IPP/2 20 0 0 5 10 15 20 25 90% 10% tr = 0.7~1ns 30ns 30 60ns t - Time (μs) Fig3. Time (ns) Fig4. Insertion Loss S21 Non - Repetitive Peak Pulse Power vs. Pulse Time Peak Pulse Power - PPK (kW) 10 1 0.1 0.01 0.1 1 10 100 1000 Pulse Duration - tp (μs) SOCAY Electronics Co., Ltd. Revision January 06, 2014 www.socay.com 2/4 @ SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Transient Voltage Suppressors Array for ESD Protection Low Capacitance SLVU2.8-4 SO-08 Package Outline & Dimensions Millimeters Inches DIM Min Max Min Max A 4.80 5.00 0.189 0.197 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.053 0.069 D 0.35 0.51 0.013 0.020 G 1.27BSC 0.050BSC H 0.10 0.25 0.004 0.010 J 0.19 0.25 0.007 0.010 K 0.40 1.27 0.016 0.050 M 0° 8° 0° 8° N 0.25 0.50 0.010 0.020 S 5.80 6.20 0.228 0.244 Soldering Footprint SOCAY Electronics Co., Ltd. Revision January 06, 2014 www.socay.com 3/4 @ SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Transient Voltage Suppressors Array for ESD Protection Low Capacitance SLVU2.8-4 Applications Note Electronic equipment is susceptible to damage caused by Electrostatic Discharge (ESD), Electrical Fast Transients (EFT), and tertiary lightning effects. Knowing that equipment can be damaged, the SLVU2.8-4 was designed to provide the level of protection required to safe guard sensitive equipment. This product can be used in different configurations to provide a level of protection to meet unidirectional line requirements as well as bidirectional requirements either in a common-mode or differential-mode configuration. Figure 1. Unidirectional Common-Mode Protection Unidirectional Common-Mode Configuration (Figure 1) The SLVU2.8-4 provides up to four lines of protection in a common-mode configuration as depicted in figure 1. Circuit connectivity is as follows: - Line 1 is connected to Pin 1 - Line 2 is connected to Pin 7 - Line 3 is connected to Pin 3 - Line 4 is connected to Pin 5 - Pins 2, 4, 7 and 8 are connected to ground Bidirectional Common-Mode Configuration (Figure2) The SLVU2.8-4 provides up to two lines of protection in a common-mode configuration as depicted in figure 2. Circuit connectivity is as follows: - Line 1 is connected to Pins 1 & 8 - Line 2 is connected to Pins 4 & 5 - Pins 2, 3, 6, and 7 are connected to ground External diode to ground is a low capacitance diode of less than 10pF Figure 2. Bidirectional Common-Mode Protection Bidirectional Differential-Mode Configuration (Figure3) The SLVU2.8-4 provides up to two-line pairs of protection in a differential - mode configuration as depicted in figure 3. Circuit connectivity is as follows: - Line Pair 1 is connected to Pins 1 & 2 - Line Pair 1 is connected to Pins 7 & 8 - Line Pair 2 is connected to Pins 3 & 4 - Line Pair 2 is connected to Pins 5 & 6 Circuit Board Layout Recommendations Circuit board layout is critical for Electromagnetic Compatibility (EMC) protection. The following guidelines are recommended: - The protection device should be placed near the input terminals or connectors, the device will divert the transient current immediately before it can be coupled into the nearby traces. - The path length between the TVS device and the protected line should be minimized. - All conductive loops including power and ground loops should be minimized. - The transient current return path to ground should be kept as short as possible to reduce parasitic inductance. - Ground planes should be used whenever possible. For multilayer PCBs, use ground vias. Figure 3. Bidirectional Differential-Mode Protection SOCAY Electronics Co., Ltd. Revision January 06, 2014 www.socay.com 4/4 @ SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information.