CM1420/22
LCD EMI Filter Array with ESD Protection
Features
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Functionally and pin compatible with CSPEMI606
(CM1420) and CSPEMI608 (CM1422) devices
Optiguard
TM
coated for improved reliability at
assembly
Six and eight channels of EMI filtering
+
15kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
+
30kV ESD protection on each channel (HBM)
Better than 30dB of attenuation at 1GHz to 3GHz
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
15-bump, 2.960mm x 1.330mm footprint
Chip Scale Package (CM1420)
20-bump, 4.000mm x 1.458mm footprint
Chip Scale Package (CM1422)
Lead-free version available
Product Description
CAMD's CM1420 and CM1422 are EMI filter arrays
with ESD protection, which integrate six and eight Pi-
filters (C-R-C), respectively. The CM1420/22 has com-
ponent values of 15pF-100Ω-15pF. These devices
include ESD protection 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). The ESD diodes con-
nected to the filter ports are designed and character-
ized to safely dissipate ESD strikes of ±15kV, beyond
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 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 CM1420/22
is ideal for EMI filtering and protecting data lines from
ESD for the LCD display in clamshell handsets.
The CM1420 and CM1422 incorporate Optiguard
TM
coating which results in improved reliability at assem-
bly. The CM1420 and CM1422 are available in space-
saving, low-profile chip-scale packages with optional
lead-free finishing.
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Applications
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LCD data lines in clamshell wireless handsets
EMI filtering & ESD protection for high-speed I/O
data ports
Wireless handsets / cell phones
Notebook computers
PDAs / Handheld PCs
EMI filtering for high-speed data lines
Electrical Schematic
100Ω
FILTERn*
15pF
15pF
FILTERn*
GND
(Pins B1-Bn)
1 of n EMI Filtering + ESD Channels
(n=6 for CM1420, 8 for CM1422)
* See Package/Pinout Diagram for expanded pin information.
© 2004 California Micro Devices Corp. All rights reserved.
04/27/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
▲
www.calmicro.com
1
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
