SLVU2.8
Low voltage unit for Gigabit Ethernet protection
Features
■
■
Peak pulse current : I
PP
= 30 A 8/20 µs
Low capacitance : C
typ
= 1.5 pF
■
Stand-off voltage : V
R
= 2.8 V
■
■
■
Low leakage current : I
Rmax
= 0.2 µA
ECOPACK
®
2 compliant component
IEC 61000-4-5 (1kV 42
Ω
24 A) compliant at
T
j
= 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
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)
SLVU2.8-4A1
SLVU2.8-8A1
■
■
■
■
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.
May 2011
Doc ID 16191 Rev 2
1/8
www.st.com
8
Characteristics
SLVU2.8
1
Characteristics
Table 1.
Symbol
P
PP
I
PP
T
stg
T
j
T
L
Absolute ratings (T
amb
= 25 °C)
Parameter
Peak pulse power (8/20 µs)
Peak pulse current (8/20 µs)
Storage temperature range
Maximum junction temperaturee
Maximum lead temperature for soldering during 10 s.
Value
600
30
-65 to + 150
-55 to + 150
260
Unit
W
A
°C
°C
°C
Table 2.
Electrical characteristics values (T
amb
= 25 °C)
I
RM
@V
RM
V
CL @
I
PP
8/20 µs
V
CL @
I
PP
8/20 µs
C
I/O to I/O
typ.
max.
pF
2.5
5
Order code
typ.
nA
max.
µA
0.2
0.2
max.
85 °C
µA
1
1
V
2.8
2.8
max.
V
15
15
A
24
24
max.
V
12
12
A
12
12
pF
1.5
3
SLVU2.8-4A1
SLVU2.8-8A1
2
2
Figure 1.
Pulse waveform
%I
PP
100
Repetitive peak pulse current
t
r
= rise time (µs)
t
p
= pulse duration time (µs)
50
0
t
r
t
p
2/8
Doc ID 16191 Rev 2
SLVU2.8
Characteristics
Figure 2.
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
Relative peak pulse power versus
initial junction temperature
Figure 3.
C(pF)
Junction capacitance versus
frequency (SLVU2.8-4A1)
P
PP
[T
j
initial] / P
PP
[T
j
initial = 25 °C]
5
4
Vosc = 30 mVRMS
Tj = 25 °C
SLVU2.8-4A1
3
Pin 1- 2
Pin 3- 4
Pin 5- 6
Pin 7- 8
2
1
F(MHz)
0
25
50
75
100
125
150
10
100
1000
Figure 4.
Junction capacitance versus
frequency (SLVU2.8-8A1)
Figure 5.
Junction capacitance versus
reverse applied voltage
(typical values)
F = 1 MHz
Vosc = 30 mV
RMS
Tj = 25 °C
5
C(pF)
Vosc = 30 mVRMS
Tj = 25 °C
5.0
4.5
4.0
3.5
C(F)
4
3
SLVU2.8-8A1
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1
2
SLVU2.8-4A1
SLVU2.8-8A1
2
1
Pin 1- 2
Pin 3- 4
Pin 5- 6
Pin 7- 8
0
10
100
F(MHz)
1000
V
R
(V)
3
Figure 6.
I
r
(nA)
Leakage current versus junction
temperature (typical values)
Figure 7.
0
dB
S21 attenuation (typical value)
100
-
-2
Vr = Vrm
10
-
-4
-
-6
1
25
50
75
100
125
T
j
(°C)
150
-
-8
300k
1M
3M
10M
30M
100M 300M
F(Hz)
1G
3G
Doc ID 16191 Rev 2
3/8
Characteristics
SLVU2.8
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 #1
Pair #3
Pair #2
Pair #2
Pair #4
Figure 10. Schematic for 10/100 Mbps Ethernet
Secondary
Protection
Primary
Protection
Tranceiver
V
RJ45
4/8
Doc ID 16191 Rev 2
SLVU2.8
Figure 11. Schematic for 1 Gbps Ethernet
Ordering information scheme
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
V
rm
= 2.8 V
Number of lines
Version
Packaging
1 = SO- 8
Doc ID 16191 Rev 2
5/8
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