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05142
SL VU2.8-4
Only One Name Means ProT ek'TionTM
UL TRA LOW CAPACIT ANCE TVS ARRA Y
APPLICA TIONS Ethernet - 10/100/1000 Base T Cellular Phones Audio/Video Inputs Personal Digital Assistant (PDA) IEC COMPA TIBILITY (EN61000-4) 61000-4-2 (ESD): Air - 15kV, Contact - 8kV 61000-4-4 (EFT): 40A - 5/50ns 61000-4-5 (Surge): 24A, 8/20s - Level 2(Line-Ground) & Level 3(Line-Line) FEA TURES 600 Watts Peak Pulse Power per Line (tp = 8/20s) Provides Protection For Two Line Pairs ESD Protection > 40 kilovolts LOW LEAKAGE CURRENT < 1.0A ULTRA LOW CAPACITANCE: 3pF Typical RoHS Complaint in Lead-Free Versions MECHANICAL CHARACTERISTICS Molded JEDEC SO-8 Weight 70 milligrams (Approximate)
SO-8
Available in Tin-Lead or Lead-Free Pure-Tin Plating(Annealed)
Solder Reflow Temperature: Tin-Lead - Sn/Pb, 85/15: 240-245C Pure-Tin - Sn, 100: 260-270C Flammability Rating UL 94V-0 12mm Tape and Reel Per EIA Standard 481 Device Marking: Marking Code, Logo, Date Code & Pin One Defined By DOT on Package PIN CONFIGURA TION
8
7
6
5
1
2
3
4
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SL VU2.8-4
DEVICE CHARACTERISTICS MAXIMUM RATINGS @ 25C Unless Otherwise Specified
PARAMETER Peak Pulse Power (tp = 8/20s) - See Figure 1 Peak Pulse Current (tp = 8/20s) Lead Soldering Temperature Operating Temperature Storage Temperature SYMBOL PPP IPP IFRM TJ TSTG VALUE 600 30 260C (10s) -55C to 150C -55C to 150C UNITS Watts Amps C C C
ELECTRICAL CHARACTERISTICS PER LINE @ 25C Unless Otherwise Specified
PART NUMBER DEVICE RATED MARKING STAND-OFF CODE VOLTAGE (See Note 1) MINIMUM BREAKDOWN VOLTAGE (See Note 1) MINIMUM SNAPBACK VOLTAGE (See Note 1) MAXIMUM CLAMPING VOLTAGE (See Note 1) (See Fig. 2) MAXIMUM CLAMPING VOLTAGE (See Note 1) (See Fig. 2) MAXIMUM CLAMPING VOLTAGE (See Note 1) (See Fig. 2) MAXIMUM CLAMPING VOLTAGE (See Note 1) (See Fig. 2) MAXIMUM LEAKAGE CURRENT (See Note 1) TYPICAL CAPACITANCE (See Note 1)
VWM VOLTS SLVU2.8-4 SL4 2.8
@ 1mA V(BR) VOLTS 3.0
@ISB = 50mA VSB VOLTS 2.8
@IP = 2A VC VOLTS 5.5
@IP = 5A VC VOLTS 8.5
@IP = 24A VC VOLTS 15
@IP = 30A VC VOLTS 21
@VWM ID A 1.0
@0V, 1MHz C pF 3
Note 1: Device measured between pin 1 to 2, pin 3 to 4, pin 5 to 6 and pin 7 to 8.
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SL VU2.8-4
GRAPHS
FIGURE 1 PEAK PULSE POWER VS PULSE TIME
10,000
PPP - Peak Pulse Current - Watts
600W, 8/20s Waveform 1,000
100
10 0.01
1
10 100 td - Pulse Duration - s
1,000
10,000
120
IPP - Peak Pulse Current - % of IPP
FIGURE 2 PULSE WAVE FORM
tf Peak Value IPP TEST WAVEFORM PARAMETERS tf = 8s td = 20s
100 80 60 40 20 0 0 5
e-t
td = t I /2 PP
10
15 t - Time - s
20
25
30
100 80
% Of Rated Power
FIGURE 3 POWER DERATING CURVE
Peak Pulse Power 8/20s
FIGURE 4 Typical Clamping Voltage vs Peak Pulse Current 20
VC - Clamping Voltage - V
PIN 2 TO 1
16 12 8 4 0
60
40 20 Average Power 0 0 25 50 75 100 125 TL - Lead Temperature - C 150
PIN 3 TO 1
0
5
10 15 20 25 IPP - Peak Pulse Current A
30
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SL VU2.8-4
APPLICA TION 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. 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 (Figure 2) The SLVU2.8-4 provides up to two lines of protection in a common-mode configuration as depicted in figure 1. 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 BIDIRECTIONAL DIFFERENTIAL-MODE CONFIGURATION (Figure 3) The SLVU2.8-4 provides up to two-line pairs of protection in a differenital-mode configuration as depicted in figure 1.
Figure 2. Bidirectional Common-Mode Protection Figure 1. Unidirectional Common-Mode Protection
External diode to ground is a low capacitance diode of less than 10pF
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.
4 www.protekdevices.com Figure 3. Bidirectional Differential-Mode Protection

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SL VU2.8-4
PACKAGE OUTLINE & DIMENSIONS
PACKAGE OUTLINE
-A-
SO-8
8
5 -B - P
+ 0.010 (0.25 MM) M B M 4 PL
DIM A B C D F G J K P R
NOTES 1. 2. 3. 4. 5. 6.
PACKAGE DIMENSIONS MILLIMETERS MIN MAX 4.80 3.80 1.35 0.35 0.40 1.27 BSC 0.18 0.10 5.80 0.25 INCHES MIN MAX
1
4
G
D C R x 45 0 - 10
K 0.010 (0.25 MM) M T B S A S 8 PL
-T-
+
J
F
5.00 0.189 0.196 4.00 0.150 0.157 0.054 0.068 1.75 0.49 0.014 0.019 0.049 1.250 0.016 1.27 BSC 0.05 BSC 0.05 BSC 0.25 0.007 0.009 0.004 0.008 0.25 6.20 0.229 0.244 0.019 0.50 0.010
MOUNTING PAD
0.050 0.005 0.030 0.005
- T - = Seating Plane and Datum Surface. Dimensions "A" and "B" are Datum. Dimensions "A" and "B" do not include mold protrusion. Maximum mold protrusion is 0.015" (0.380 mm) per side. Dimensioning and tolerances per ANSI Y14.5M, 1982. Dimensions are exclusive of mold flash and metal burrs.
TAPE & REEL/BULK ORDERING NOMENCLATURE 1. Surface mount product is taped and reeled in accordance with EIA-481. 2. Suffix-T7 = 7 Inch Reel - 1,000 pieces per 12mm tape, i.e., SLVU2.8-4-T7. 3. Suffix-T13 = 13 Inch Reel - 2,500 pieces per 12mm tape, i.e., SLVU2.8-4-T13. 4. Suffix - LF = Lead-Free, Pure Tin Plating, i.e., SLVU2.8-4-LF-T7. 5. No Suffix = Product Shipped in Tubes of 98 pcs per Tube.
0.160 0.005
0.245 MIN
0.045 0.005
Outline & Dimensions: Rev 1 - 11/01, 06009
COPYRIGHT (c) ProTek Devices 2005 SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except JEDEC). DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer's and that in furnishing engineering and technical assistance, ProTek assumes no responsibility with respect to the selection or specifications of such products.
ProTek Devices 2929 South Fair Lane, Tempe, AZ 85282 Tel: 602-431-8101 Fax: 602-431-2288 E-Mail: sales@protekdevices.com Web Site: www.protekdevices.com
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