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1
VEMI65AA-HCI
Vishay Semiconductors
Application Note:
With the VEMI65AA-HCI 6 different signal or data lines can be filtered and clamped to ground. Due to the
different clamping levels in forward and reverse direction the clamping behaviour is Bi
As
ymmetric (BiAs).
L1
L2
L3
L4
L6
OUT
OUT
OUT
OUT
OUT
OUT
20379
L1IN
L2IN
L3IN
L4IN
L5IN L5
L6IN
1
2
3
4
5
6
12
11
10
13
9
8
7
directional and
The 6 independent EMI-Filter are placed between
pin 1 and pin 12,
pin 2 and pin 11,
pin 3 and pin 10,
pin 4 and pin 9,
pin 5 and pin 8 and
pin 6 and pin 7.
They all are connected to a common ground pin 13 on the backside of the package.
The circuit diagram of one EMI-filter-channel shows two identical Z-diodes at the input to ground and the output
to ground. These Z-diodes are characterized by the breakthrough voltage level (V
capacitance (C
Together with these capacitors and the line resistance R
pass filter. Low frequency signals (f < f
to ground through the diode capacitances C
). Below the breakthrough voltage level the Z-diodes can be considered as capacitors.
D
(Pin 1, 2, 3, 4, 5, 6)
) pass the filter while high frequency signals (f > f
3dB
In
C
D
.
D
between input and output the device works as a low
S
R
S
Out
(Pin 7, 8, 9, 10, 11, 12)
C
D
) and the diode
BR
) will be shorted
3dB
20380
GND
(Pin 13)
Each filter is symmetrical so that both ports can be used as input or output.
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For technical support, please contact: EMI-filter@vishay.com
Document Number 81384
Rev. 1.4, 03-Jun-08
Electrical Characteristics
Ratings at 25 °C, ambient temperature unless otherwise specified
VEMI65AA-HCI
All inputs (pin 1, 2, 3, 4, 5 and 6) to ground (pin 13)
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3
VEMI65AA-HCI
V
Vishay Semiconductors
100
10
1
(mA)
F
I
0.1
0.01
0.001
0.50.60.70.80.91
20705
VF (V)
Figure 3. Typical Forward Current IF vs. Forward Voltage V
8
7
6
5
4
(V)
R
V
3
2
1
0
0.01 0.1110100 1000 10000
20707
IR (µA)
70
f = 1 MHz
60
50
40
(pF)
IN
30
C
20
10
0
0123456
20706
F
Figure 6. Typical Input Capacitance CIN vs. Input Voltage V
0
- 5
- 10
- 15
- 20
- 25
- 30
Transmission (S21) (dB)
- 35
Measured in a 50 Ω system
- 40
1100100010000
20708
VIN (V)
V
= 5 V
INPUT
V
= 2 V
INPUT
V
= 1 V
INPUT
V
= 0 V
INPUT
10
Frequency (MHz)
IN
Figure 4. Typical Reverse Voltage VR vs.
(V)
C
V
20709
Figure 5. Typical Peak Clamping Voltage VC vs.
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4
Reverse Current I
14
12
Input clamping voltage
10
8
Output clamping voltage
6
4
Measured
2
acc. IEC 61000-4-5
(8/20 µs - wave form)
0
01234567
R
IPP (A)
Peak Pulse Current I
PP
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Figure 7. Typical Small Signal Transmission (S21)
at Z
= 50 Ω
O
Document Number 81384
Rev. 1.4, 03-Jun-08
Package Dimensions in millimeters (inches): LLP2513-13L
VEMI65AA-HCI
Vishay Semiconductors
20381
Document Number 81384
Rev. 1.4, 03-Jun-08
For technical support, please contact: EMI-filter@vishay.com
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5
VEMI65AA-HCI
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating
systems with respect to their impact on the health and safety of our employees and the public, as well as
their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use
of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively.
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA.
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use Vishay Semiconductors products for any unintended or
unauthorized application, the buyer shall indemnify Vishay Semiconductors against all claims, costs, damages,
and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated
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Document Number 81384
Rev. 1.4, 03-Jun-08
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.