VEMI65AC-HCI-GS08 Datasheet, PDF (2/6 Pages) Vishay Siliconix – 6-Channel EMI-Filter with ESD-Protection

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VEMI65AC-HCI
Vishay Semiconductors
APPLICATION NOTE
With the VEMI65AC-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).
L1IN
L2IN
L3IN
L4IN
L5IN
L6IN
1
12
2
11
3
10
13
4
9
5
8
6
7
L1OUT
L2OUT
L3OUT
L4OUT
L5OUT
L6OUT
20379
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_BR) and the diode capacitance (C_D). Below the
breakthrough voltage level the Z-diodes can be considered as capacitors. Together with these capacitors and the line
resistance R_S between input and output the device works as a low pass filter. Low frequency signals (f < f_3dB) pass the filter
while high frequency signals (f > f_3dB) will be shorted to ground through the diode capacitances C_D.
R_S
In
(pin 1, 2, 3, 4, 5, 6)
Out
(pin 7, 8, 9, 10, 11, 12)
C_D
C_D
20380
GND
(pin 13)
Each filter is symmetrical so that both ports can be used as input or output.
Rev. 1.7, 08-Aug-12
2
Document Number: 81680
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000