© 2000 California Micro Devices Corp. All rights reserved.
7/14/2000
1
PRC201/211/221
CALIFORNIA MICRO DEVICES
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
EMI/RFI Tapped Filter
Features
· 8 EMI/RFI protection lines/package
· Stable resistor-capacitor network
· No signal delays
· Saves board space and component cost
· Suitable for PCMCIA interface cards
Product Description
CAMD's PRC201/211/221 Tapped Filter is designed to
suppress EMI/RFI noise on high speed data lines and at
I/O ports of PCMCIA fax/modem and LAN type cards.
This integrated thin film resistor-capacitor network is
housed in a ultra low profile, surface mount package
suitable for bottom side mounting to the card which
minimizes space and routing problems and improves
reliability.
Why thin film EMI/RFI filters? EMI/RFI filters are needed
to suppress noise at low and high frequencies of the
signal. Ferrite beads used for EMI/RFI filtering are bulky
and ineffective at low frequencies and have saturation
problems at high frequencies. Resistor-capacitor
networks offer the best technical approach for effective
Applications
· EMI/RFI Filter
· Low Pass Filter
C1190600
SCHEMATIC CONFIGURATION
EMI/RFI filtering. Conventional thick film-based EMI/RFI
filters do not effectively suppress noise at high frequen-
cies due to the fact that EMI/RFI filters using thick film
technology have high parasitic inductance which
becomes the dominant component of the capacitor's
impedance past resonance, and therefore significantly
affects high frequency performance of the filter.
CAMD's PRC201/211/221 Tapped Filter is fabricated on
a silicon substrate using advanced thin film technology.
These EMI/RFI filters have very low parasitic inductance
and suppress EMI/RFI noise at low and high frequencies
to well above 1000 MHz.
20
19 18
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©2000 California Micro Devices Corp. All rights reserved.
7/14/2000
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
2
PRC201/211/221
CALIFORNIA MICRO DEVICES
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California Micro Devices can develop a fully customized solution which embodies the configuration shown in this data
sheet or modified to suit specific application requirements. A Non-Recurring Engineering (NRE) charge will apply for
all fully customized requirements and a minimum order/lot will be required.
Please direct your detailed circuit configuration and specification requirements to your local CAMD representative or
to the factory for a quotation.
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T
T
/
M
0
0
5
/
K
0
5
7
1
2
2
C
R
P
R
/
M
0
0
5
/
K
0
5
7
1
2
2
C
R
P
M
0
0
5
/
K
0
5
7
1
2
2
C
R
P
F
1
0
1
/
1
0
1
0
2
P
O
S
S
T
T
/
M
1
0
1
/
K
1
0
1
1
2
2
C
R
P
R
/
M
1
0
1
/
K
1
0
1
1
2
2
C
R
P
M
1
0
1
/
K
1
0
1
1
2
2
C
R
P
F
1
5
1
/
1
0
1
0
2
P
O
S
S
T
T
/
M
1
5
1
/
K
1
0
1
1
2
2
C
R
P
R
/
M
1
5
1
/
K
1
0
1
1
2
2
C
R
P
M
1
5
1
/
K
1
0
1
1
2
2
C
R
P
* With 0 source impedance.
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