SLVU2.8 Low voltage unit for Gigabit Ethernet protection Features ■ Peak pulse current : IPP = 30 A 8/20 µs ■ Low capacitance : Ctyp = 1.5 pF ■ Stand-off voltage : VR = 2.8 V ■ Low leakage current : IRmax = 0.2 µA ■ ECOPACK®2 compliant component ■ IEC 61000-4-5 (1kV 42 Ω 24 A) compliant at Tj = 150 °C SO-8 package Complies with the following standards ■ IEC 61000-4-2 level 4 – 15 kV (air discharge) – 8 kV (contact discharge) ■ IEC 61000-4-4 level 4 – ± 2 kV - 40 A (5/50 ns) ■ IEC 61000-4-5 level 2 – ± 1 kV - 42 Ω Description ■ IEEE 802.3ab and 802.3at compatible on both receiver (4 Vmax ) and driver side ( 3.6 Vmax) The SLVU2.8 series has been designed to protect Ethernet line. Its low capacitance makes it compatible with Gigabit Ethernet. ■ MIL STD 883G - Method 3015-7 – 25 kV (human body model) SLVU2.8-4A1 SLVU2.8-8A1 SLVU2.8-4A1 is designed to be compatible with Gigabiit Ethernet and Gigabit PoE by using two SO-8 packages and can be used on 10/100 Mbps Ethernet by using a single device. SLVU2.8-8A1 is designed to be compatible with Gigabiit Ethernet and Gigabit PoE by using a single SO-8 package. Surge capability is compatible with IEC 61000-4-5 class 2 (1 kV, 42 Ω, 24 A). Packaged in SO-8, the SLVU2.8 is a flow-through design in order to minimize trace inductances. Footprint is in accordance with IPC 7531 standard. May 2011 Doc ID 16191 Rev 2 1/8 www.st.com 8 Characteristics 1 SLVU2.8 Characteristics Table 1. Absolute ratings (Tamb = 25 °C) Symbol Parameter Unit PPP Peak pulse power (8/20 µs) 600 W IPP Peak pulse current (8/20 µs) 30 A Tstg Storage temperature range -65 to + 150 °C Tj Maximum junction temperaturee -55 to + 150 °C TL Maximum lead temperature for soldering during 10 s. 260 °C Table 2. Electrical characteristics values (Tamb = 25 °C) VCL @IPP IRM @VRM VCL @IPP C 8/20 µs I/O to I/O 8/20 µs Order code typ. max. max. 85 °C nA µA µA V V A V SLVU2.8-4A1 2 0.2 1 2.8 15 24 SLVU2.8-8A1 2 0.2 1 2.8 15 24 Figure 1. max. max. typ. max. A pF pF 12 12 1.5 2.5 12 12 3 5 Pulse waveform %IPP Repetitive peak pulse current tr = rise time (µs) tp = pulse duration time (µs) 100 50 0 2/8 Value tr tp Doc ID 16191 Rev 2 SLVU2.8 Figure 2. Characteristics Relative peak pulse power versus initial junction temperature PPP[Tj initial] / PPP[T j initial = 25 °C] 1.1 5 1.0 0.9 Junction capacitance versus frequency (SLVU2.8-4A1) C(pF) Vosc = 30 mVRMS Tj = 25 °C 4 0.8 0.7 SLVU2.8-4A1 Pin 1- 2 Pin 3- 4 Pin 5- 6 Pin 7- 8 3 0.6 0.5 2 0.4 0.3 1 0.2 0.1 F(MHz) 0 0.0 0 Figure 4. 25 50 75 100 125 10 150 Junction capacitance versus frequency (SLVU2.8-8A1) 5.0 1000 Junction capacitance versus reverse applied voltage (typical values) C(F) F = 1 MHz Vosc = 30 mVRMS Tj = 25 °C 4.5 Vosc = 30 mVRMS Tj = 25 °C 4 100 Figure 5. C(pF) 5 Figure 3. 4.0 3.5 3.0 3 2.5 SLVU2.8-8A1 Pin 1- 2 Pin 3- 4 Pin 5- 6 Pin 7- 8 2 1 1.5 10 Figure 6. 100 100 SLVU2.8-4A1 1.0 0.5 F(MHz) 0 SLVU2.8-8A1 2.0 1000 Leakage current versus junction temperature (typical values) 0.0 VR(V) 0 1 Figure 7. 2 3 S21 attenuation (typical value) 0 dB Ir(nA) --2 Vr = Vrm --4 10 --6 Tj (°C) 1 25 50 75 100 125 150 F(Hz) --8 300k Doc ID 16191 Rev 2 1M 3M 10M 30M 100M 300M 1G 3G 3/8 Characteristics Figure 8. SLVU2.8 Connection for 10/100 Mbps Ethernet with SLVU2.8-4A1 Figure 9. Connection for 1G Ethernet with SLVU2.8-8A1 Pair #1 Pair #1 Pair #3 Pair #2 Pair #2 Pair #4 Figure 10. Schematic for 10/100 Mbps Ethernet Tranceiver Primary Protection Secondary Protection V RJ45 4/8 Doc ID 16191 Rev 2 SLVU2.8 Ordering information scheme Figure 11. Schematic for 1 Gbps Ethernet Secondary Protection (optional) V Tranceiver Primary Protection V 1. For further information, refer to application note : AN3007 2 Ordering information scheme Figure 12. Ordering information scheme SLVU 2.8 - 4 A 1 ST low voltage unit Stand off voltage Vrm = 2.8 V Number of lines Version Packaging 1 = SO- 8 Doc ID 16191 Rev 2 5/8 Package information 3 SLVU2.8 Package information ● Case: JEDEC SO-8 molded plastic over planar junction ● Terminals: Solder plated, solderable per MIL-STD-750, Method 2026 ● Flammability: Epoxy is rated UL94V-0 ● RoHS package In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Table 3. SO-8 dimensions Dimensions Ref. Seating Plane C A2 Min. h x 45° C A1 e b A Millimeters L k ppp C L1 Typ. A Inches Max. Min. Typ. 1.75 A1 0.1 A2 1.25 0.25 Max. 0.069 0.004 0.010 0.049 b 0.28 0.48 0.011 0.019 C 0.17 0.23 0.007 0.009 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 D 8 5 E1 1 E e 4 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 8° 0° L1 1.04 k 0.041 0° ppp 0.10 8° 0.004 Figure 13. Foot print recommendations Figure 14. Marking 6.8 (0.268) 0.6 (0.024) 4.2 (0.165) â 1.27 (0.050) 6/8 xxxxxx Doc ID 16191 Rev 2 z z y ww Pin 1 XXXXX : Marking ZZ : Manufacturing location Y : Year WW : week SLVU2.8 4 Ordering information Ordering information Table 4. 5 Ordering information Order code Marking Package Weight Base qty Delivery mode SLVU2.8-4A1 SLVU284 SO-8 78 mg 2500 Tape and reel SLVU2.8-8A1 SLVU288 SO-8 78 mg 2500 Tape and reel Revision history Table 5. Document revision history Date Revision Changes 01-Sep-2009 1 Initial release. 31-May-2011 2 Updated Ethernet standard compatibility on the cover page. 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