CSPEMI204
2 Channel Headset EMI Filter with ESD Protection
Features
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Two channels of EMI filtering, one for a micro-
phone and one for an earpiece speaker
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
Chip Scale Package features extremely low para-
sitic inductance for optimum filter performance
Greater than 30dB relative attenuation in the 800-
2700MHz range
±8kV
ESD protection on each channel (IEC 61000-
4-2 Level 4, contact discharge)
±15kV
ESD protection on each channel (HBM)
5-bump, 0.930mm X 1.410mm footprint
Chip Scale Package (CSP)
Lead-free version available
Product Description
The CSPEMI204 is a low-pass filter array designed
specifically to reduce EMI/RFI emissions and provide
ESD protection for a headset port on a cellular and
mobile devices. The CSPEMI204 integrates two high
quality, pi-style filters (C-R-C) filters, one for a micro-
phone and one for an earpiece or speaker, each pro-
viding more than 30dB attenuation relative to the pass
band attenuation in the 800-2700 MHz range. These
filters support bidirectional filtering, reducing EMI both
to and from the headset port and support bipolar audio
signals without distortion.
In addition, the CSPEMI204 provides a very high level
of protection for sensitive electronic components that
may be subject to electrostatic discharge (ESD). The
CSPEMI204 can safely dissipate ESD strikes of
±8kV,
the maximum requirement of the IEC 61000-4-2 inter-
national standard. Using the MIL-STD-883 (Method
3015) specification for Human Body Model (HBM)
ESD, the device provides protection for contact dis-
charges to greater than
±15kV.
The CSPEMI204 pro-
tects sensitive components such as CPU and DSPs
that have much weaker internal ESD protection cir-
cuitry usually only intended for mechanical handling
protection.
The CSPEMI204 is particularly well-suited for portable
electronics because of its small package format and
low weight. The CSPEMI204 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 micro-
phone and earpiece speaker ports
Cellular / Mobile Phones
Notebooks and Personal Computers
Handheld PCs / PDAs / Tablets
Wireless Handsets
Digital Camcorders
Electrical Schematic
Earpiece A1
Input
10
Ω
C1 Earpiece
Output
Microphone A3
Input
68
Ω
C3 Microphone
Output
100pF
100pF
GND
B2
© 2005 California Micro Devices Corp. All rights reserved.
09/28/05
47pF
47pF
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.cmd.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
