CM1411
2 Channel Headset/Speaker EMI Filter with ESD Protection
Features
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Functionally and pin compatible with CMD’s
CSPEMI201A
OptiGuard
™
coated for improved reliability at
assembly
Two channels of EMI filtering
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
Greater than 40dB attenuation at 1GHz
+
8kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
+
15kV ESD protection in each channel (HBM)
Supports AC signals—ideal for audio applications
Extremely low lead inductance for optimum filter
and ESD performance
5-bump, 0.950mm X 1.410mm footprint
Chip Scale Package (CSP)
Lead-free version available
Product Description
The CM1411 is a dual low-pass filter array integrating
two pi-style filters (C-R-C) that reduce EMI/RFI emis-
sions while at the same time providing ESD protection.
This part is custom-designed to interface with a
speaker port on a cellular telephone or similar device.
Each high quality filter provides more than 35dB atten-
uation in the 800-2700 MHz range. These pi-style fil-
ters support bidirectional filtering, controlling EMI both
to and from a speaker element. They also support AC
signals with a cutoff frequency of 31MHz, enabling
audio signals to pass through without distortion.
In addition, the CM1411 provides a very high level of
protection for sensitive electronic components that may
be subjected to electrostatic discharge (ESD). The
CM1411 can safely dissipate ESD strikes of 8kV, the
maximum requirement of the IEC 61000-4-2 interna-
tional standard. Using the MIL-STD-883 (Method 3015)
specification for Human Body Model (HBM) ESD, the
device provides protection for contact discharges to
greater than 15kV.
The CM1411 is particularly well-suited for portable
electronics (e.g., cellular telephones, PDAs, notebook
computers) because of its small package format and
low weight. The CM1411 incorporates
OptiGuard
™
coating which results in improved reliability at assem-
bly and is available in a space-saving, low-profile Chip
Scale Package with optional lead-free finishing.
Applications
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EMI filtering and ESD protection for
headset/speaker ports
Wireless Handsets
Handheld PCs / PDAs
MP3 Players
Digital Camcorders
Notebooks
Desktop PCs
Electrical Schematic
A1
10Ω
C1
100pF
SPKR_IN1
SPKR_OUT1
100pF
SPKR_IN2
A3
10Ω
C3
100pF
SPKR_OUT2
100pF
GND
B2
©
2005 California Micro Devices Corp. All rights reserved.
09/15/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
