PRELIMINARY
CM1426
LCD and Camera EMI Filter Array with ESD Protection
Features
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Four, six and eight channels of EMI filtering with
integrated ESD protection
0.5mm pitch, 10-bump, 1.96mm x 1.33mm foot-
print Chip Scale Package (CM1426-04)
0.5mm pitch, 15-bump, 2.96mm x 1.33mm foot-
print Chip Scale Package (CM1426-06)
0.5mm pitch, 20-bump, 3.96mm x 1.33mm foot-
print Chip Scale Package (CM1426-08)
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
±8kV
ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
±15kV
ESD protection on each channel (HBM)
Greater than 20dB 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 CM1426 is a family of pi-style EMI filter arrays with
ESD protection, which integrates four, six and eight fil-
ters (C-R-C) in a Chip Scale Package with 0.50mm
pad pitch. The CM1426 has component values of
8.5pF-100Ω-8.5pF per channel. The CM1426 has a
cut-off frequency of 230MHz and can be used in appli-
cations where the data rates are as high as 92Mbps.
The parts include avalanche-type ESD diodes on every
pin, which provide a very high level of protection for
sensitive electronic components that may be subjected
to electrostatic discharge (ESD). The ESD protection
diodes safely dissipate ESD strikes of
±8kV,
well
beyond the maximum requirement of the IEC61000-4-
2 international standard. Using the MIL-STD-883
(Method 3015) specification for Human Body Model
(HBM) ESD, the pins are protected for contact dis-
charges at greater than
±15kV.
These devices are particularly well-suited for portable
electronics (e.g. wireless handsets, PDAs, notebook
computers) because of their small package and easy-
to-use pin assignments. In particular, the CM1426 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 CM1426 incorporates
Optiguard
™
which results in
improved reliability at assembly. The CM1426 is avail-
able in a space-saving, low-profile Chip Scale Package
with optional lead-free finishing.
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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 A1-An)
FILTER+ESDn*
(Pins C1-Cn)
8.5pF
8.5pF
GND*
(Pins B1-Bm)
* See Package/Pinout Diagram
for expanded pin information.
© 2005 California Micro Devices Corp. All rights reserved.
08/30/05
1 of 4, 6 or 8 EMI/RFI + ESD 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.calmicro.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
