CM1441
4-Channel EMI Filter Array w/ ESD + 4-channel ESD Array
Features
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Four channels of EMI filtering with integrated ESD
protection
Four channels of ESD-only protection
0.4mm pitch, 15-bump, 2.360mm X 1.053mm foot-
print Chip Scale Package (CSP)
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
±30kV
ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
±30kV
ESD protection on each channel (HBM)
Greater than 35dB attenuation (typical) at 1 GHz
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
OptiGuard
™
coated for improved reliability at
assembly
Lead-free version available
Product Description
The CM1441 is a multichannel EMI/ESD array consist-
ing of four low-pass filter + ESD channels to reduce
EMI emissions on data ports and lines and four dedi-
cated ESD-only channels. Each EMI filter channel inte-
grates a high quality pi-style filter (30pF-100Ω-30pF)
which provides greater than 30dB of attenuation in the
800MHz to 2.7GHz frequency range. The parts include
avalanche-type ESD diodes on every pin, which pro-
vide a very high level of protection for sensitive elec-
tronic components that may be subjected to
electrostatic discharge (ESD). All ESD protection
diodes safely dissipate ESD strikes of
±30kV,
beyond
the maximum requirement of the IEC61000-4-2 inter-
national standard. Using the MIL-STD-883 (Method
3015) specification for Human Body Model (HBM)
ESD, the pins are protected for contact discharges at
greater than
±30kV.
This device is particularly well suited for portable elec-
tronics (e.g. wireless handsets, PDAs, notebook com-
puters) because of its small package format and easy-
to-use pin assignments. In particular, the CM1441 is
ideal for EMI filtering and protecting data and control
lines for the I/O data ports, LCD display and camera
interface in mobile handsets.
The CM1441 incorporates
OptiGuard
™
which results
in improved reliability at assembly. The CM1441 is
available in a space-saving, low-profile Chip Scale
Package with optional lead-free finishing. It is manu-
factured with a 0.40mm pitch and 0.25mm CSP solder
ball to provide up to 28% board space saving vs. com-
peting CSP devices with 0.50mm pitch and 0.30mm
CSP solder ball.
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Applications
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LCD and Camera data lines in mobile handsets
I/O port protection for mobile handsets, notebook
computers, PDAs etc.
EMI filtering for data ports in cell phones, PDAs or
notebook computers.
Wireless handsets
Handheld PCs/PDAs
LCD and camera modules
Electrical Schematic
100Ω
FILTER+ESDn*
(Pins A2-A5)
FILTER+ESDn*
(Pins C2-C5)
ESDn*
(Pins A1, A6,
C1, C6)
30pF
30pF
30pF
GND
(Pins B1-B3)
1 of 4 EMI/RFI + ESD Channels.
* See Package/Pinout Diagram for expanded pin information.
© 2005 California Micro Devices Corp. All rights reserved.
11/08/05
1 of 4 ESD-only Channels
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 ]
