VEMI65AA-HCI Vishay, VEMI65AA-HCI Datasheet - Page 2

• Manufacturer Part Number: VEMI65AA-HCI
• Description: 6-channel Emi-filter With Esd-protection
• Manufacturer: Vishay

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 Bidirectional and
Asymmetric (BiAs).
The 6 independent EMI-Filter are placed between
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
Each filter is symmetrical so that both ports can be used as input or output.
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2
L4
L5
L1
L2
L3
L6
IN
IN
IN
IN
IN
IN
D
). Below the breakthrough voltage level the Z-diodes can be considered as capacitors.
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.
(Pin 1, 2, 3, 4, 5, 6)
20380
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In
1
2
3
4
5
6
C
D
3dB
13
) pass the filter while high frequency signals (f > f
12
11
10
9
8
7
D
.
(Pin 13)
GND
R
S
S
between input and output the device works as a low
L1
L2
L3
L4
L6
L5
OUT
OUT
OUT
OUT
OUT
OUT
(Pin 7, 8, 9, 10, 11, 12)
20379
C
D
Out
Document Number 81384
3dB
BR
Rev. 1.3, 26-Feb-08
) and the diode
) will be shorted