SLVU2.8-4A1 - STMICROELECTRONICS

May 2011 Doc ID 16191 Rev 2 1/8

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

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

■IEEE 802.3ab and 802.3at compatible on both

receiver (4 Vmax ) and driver side ( 3.6 Vmax)

■MIL STD 883G - Method 3015-7

– 25 kV (human body model)

Description

The SLVU2.8 series has been designed to protect

Ethernet line. Its low capacitance makes it

compatible with Gigabit Ethernet.

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.

SLVU2.8-4A1 SLVU2.8-8A1

SO-8 package

www.st.com

Characteristics SLVU2.8

2/8 Doc ID 16191 Rev 2

1 Characteristics

Figure 1. Pulse waveform

Table 1. Absolute ratings (Tamb = 25 °C)

Symbol Parameter Value 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

TjMaximum junction temperaturee -55 to + 150 °C

TLMaximum lead temperature for soldering during 10 s. 260 °C

Table 2. Electrical characteristics values (Tamb = 25 °C)

Order code

IRM @VRM

VCL @IPP

8/20 µs

VCL @IPP

8/20 µs

I/O to I/O

typ. max. max.

85 °C max. max. typ. max.

nA µA µA V V A V A pF pF

SLVU2.8-4A1 2 0.2 1 2.8 15 24 12 12 1.5 2.5

SLVU2.8-8A1 2 0.2 1 2.8 15 24 12 12 3 5

100

Repetitive peak pulse current

t = rise time (µs)

t = pulse duration time (µs)

trtp

%IPP

SLVU2.8 Characteristics

Doc ID 16191 Rev 2 3/8

Figure 2. Relative peak pulse power versus

initial junction temperature

Figure 3. Junction capacitance versus

frequency (SLVU2.8-4A1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

0 25 50 75 100 125 150

P [T initial] / P [T initial = 25 °C]

PP j PP j

10 100 1000

F(MHz)

Pin 1- 2

Pin 3- 4

Pin 5- 6

Pin 7- 8

SLVU2.8-4A1

Vosc = 30 mVRMS

Tj= 25 °C

C(pF)

Figure 4. Junction capacitance versus

frequency (SLVU2.8-8A1)

Figure 5. Junction capacitance versus

reverse applied voltage

(typical values)

10 100 1000

Vosc = 30 mVRMS

Tj= 25 °C

C(pF)

Pin 1- 2

Pin 3- 4

Pin 5- 6

Pin 7- 8

SLVU2.8-8A1

F(MHz)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0123

F = 1 MHz

Vosc = 30 mV

Tj= 25 °C

RMS

SLVU2.8-4A1

SLVU2.8-8A1

V (V)

C(F)

Figure 6. Leakage current versus junction

temperature (typical values)

Figure 7. S21 attenuation (typical value)

Vr = Vrm

100

25 50 75 100 125 150

I (nA)

T (°C)

300k 1M 3M 10M 30M 100M 300M 1G 3G

-8

-6

-4

-2

F(Hz)

Characteristics SLVU2.8

4/8 Doc ID 16191 Rev 2

Figure 10. Schematic for 10/100 Mbps Ethernet

Figure 8. Connection for 10/100 Mbps

Ethernet with SLVU2.8-4A1

Figure 9. Connection for 1G Ethernet with

SLVU2.8-8A1

Pair #1

Pair #2

Pair #1

Pair #2

Pair #3

Pair #4

Secondary

Protection

Tranceiver

RJ45

Primary

Protection

SLVU2.8 Ordering information scheme

Doc ID 16191 Rev 2 5/8

Figure 11. Schematic for 1 Gbps Ethernet

1. For further information, refer to application note : AN3007

2 Ordering information scheme

Figure 12. Ordering information scheme

Secondary

Protection

Tranceiver

Primary

Protection

(optional)

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

Package information SLVU2.8

6/8 Doc ID 16191 Rev 2

3 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

Ref.

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A1.750.069

A1 0.1 0.25 0.004 0.010

A2 1.25 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

e 1.27 0.050

h 0.25 0.50 0.010 0.020

L 0.40 1.27 0.016 0.050

L1 1.04 0.041

k0° 8°0° 8°

ppp 0.10 0.004

Figure 13. Foot print recommendations Figure 14. Marking

bA1

ppp C

h x 45°

Seating

Plane

6.8

(0.268)

4.2

(0.165)

1.27

(0.050)

0.6

(0.024)

XXXXX : Marking

ZZ : Manufacturing location

Y : Year

WW : week

zz zz yy ww ww

xx xx xx xx xx xx

Pin 1

SLVU2.8 Ordering information

Doc ID 16191 Rev 2 7/8

4 Ordering information

5 Revision history

Table 4. 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

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.

SLVU2.8

8/8 Doc ID 16191 Rev 2

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