VEMI255A-HS3 Vishay, VEMI255A-HS3 Datasheet - Page 2

• Manufacturer Part Number: VEMI255A-HS3
• Description: 2-channel Emi-filter With Esd-protection
• Manufacturer: Vishay

VEMI255A-HS3
Vishay Semiconductors
Application Note:
a) With the VEMI255A-HS3 2 different signal or data lines can be filtered and clamped to ground. Due to the
The 2 independent EMI-filter are placed between
They all are connected to the common ground pin 2.
Pin 5 is internally not connected.
Each filter is symmetrical so that all ports (pin 1, 3, 4,
and 6) can be used as input or output.
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.
www.vishay.com
2
different clamping levels in forward and reverse direction the clamping behavior is Bidirectional and
Asymmetric (BiAs).
19500
L1
L2
IN
IN
D
pin 1 and pin 6, and
pin 3 and pin 4
). Below the breakthrough voltage level the Z-diodes can be considered as capacitors.
For technical support, please contact: [e-mail]
1
2
3
(Pin 1, 3)
21085
In
3dB
C
) pass the filter while high frequency signals (f > f
D
D
.
6
5
4
(Pin 2)
GND
R
S
S
between input and output the device works as a low
L1
L2
OUT
OUT
C
D
(Pin 4, 6)
Out
19420
19421
Document Number 84772
BR
3dB
) and the diode
Rev. 1.4, 22-Feb-08
) will be shorted