PRELIMINARY
CM1484
Dual Channel EMI Filter with ESD Protection
Features
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Two channels of EMI filtering with integrated ESD
protection
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
±15kV
ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
±30kV
ESD protection on each channel (HBM)
Greater than 20dB attenuation (typical) at 1 GHz
5-lead SC70 package
Lead-free version available
Product Description
The CM1484 is a 2 channel pi-style EMI filter array with
ESD protection, housed in a 5-lead SC-70 package.
The CM1484 has component values of 11pF-100Ω-
11pF per channel. The CM1484 has a cut-off fre-
quency of 220MHz and can be used in applications
with data rates up to 80Mbps. The parts include 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
±15kV,
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
discharges at greater than
±30kV.
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 CM1484 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 CM1484 is housed in a small, 5-lead SC70 pack-
age and is available with lead-free finishing
.
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*
11pF
C
GND
R
C
11pF
FILTER+ESDn*
1 of 2 EMI/RFI Filter Channels
with Integrated ESD Protection
* See Package/Pinout Diagram
for expanded pin information.
© 2006 California Micro Devices Corp. All rights reserved.
05/12/06
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 ]
