© 2005 California Micro Devices Corp. All rights reserved.
09/15/05 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 1
CM1410
4 Channel Headset EMI Filter with ESD Protection
Features
• Functionally and pin compatible with CSPEMI200A
device
• Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
• Four channels of EMI filtering with ESD protection
• Includes 1 channel of ESD-only protection
• Greater than 30dB attenuation at 1GHz
•
+8kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
•
+15kV ESD protection on each channel (HBM)
• Supports bipolar signals—ideal for
audio applications
• Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
• 11-bump, 2.046mm X 1.436mm footprint
Chip Scale Package (CSP)
• Optiguard
™ coated for improved reliability at
assembly
• Lead-free version available
Applications
• EMI filtering and ESD protection for audio ports
• Wireless Handsets
• Handheld PCs / PDAs
• MP3 Players
• Digital Camcorders
• Notebooks
• Desktop PCs
Product Description
The CM1410 is a quad low-pass filter array integrating
four pi-style filters (C-R-C) that reduce EMI/RFI emis-
sions while at the same time providing ESD protection.
This device is custom-designed to interface with the
headset port on a cellular telephone, and contains 3
different filter values. Each high quality filter provides
more than 20dB attenuation in the 800-2700 MHz
range. These pi-style filters support bidirectional filter-
ing, controlling EMI both to and from the microphone
and speaker elements. They also support bipolar sig-
nals, enabling audio signals to pass through without
distortion.
In addition, the CM1410 provides a very high level of
protection for sensitive electronic components that may
be subject to electrostatic discharge (ESD). The
CM1410 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 CM1410 also includes a sin-
gle channel of ESD-only protection.
The CM1410 is particularly well suited for portable
electronics (e.g., cellular telephones, PDAs, notebook
computers) because of its small package format and
low weight.
The CM1410 incorporates Optiguard
™ coating which
results in improved reliability at assembly.The CM1410
is available in a space-saving, low-profile Chip Scale
Package with optional lead-free finishing.
Electrical Schematic
10
Ω
100pF
100pF
100
Ω
47pF
47pF
MIC_IN1
B2
A2
A3
A4
B4
C1
C2
C3
C4
B3
ESD1
MIC_IN2
SPKR_OUT1
SPKR_OUT2
GND
GND
SPKR_IN2
SPKR_IN1
MIC_OUT2
MIC_OUT1
B1
68
Ω
47pF
47pF
10
Ω
100pF
100pF
