CM1431
LCD and Camera EMI Filter Array with ESD Protection
Product Description
Features
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Four, six and eight channels of EMI filtering with
integrated ESD protection
The CM1431 is a family of pi-style EMI filter arrays with
ESD protection, which integrates four, six and eight fil-
ters (C-R-C) in small form factor TDFN 0.40mm pitch
packages. The CM1431 has component values of
15pF-100Ω-15pF per channel. The CM1431 has a cut-
off frequency of 120MHz and can be used in applica-
tions with data rates up to 48Mbps. 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 require-
ment of the IEC61000-4-2 international standard.
Using the MIL-STD-883 (Method 3015) specification
for Human Body Model (HBM) ESD, the pins are pro-
tected for contact discharges at greater than 30kV.
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 35dB attenuation (typical) at 1 GHz
TDFN package with 0.40mm lead pitch:
• 4-ch. = 8-lead TDFN
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• 6-ch. = 12-lead TDFN
• 8-ch. = 16-lead TDFN
Tiny TDFN package size:
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• 8-lead: 1.7mm x 1.35mm
• 12-lead: 2.5mm x 1.35mm
• 16-lead: 3.3mm x 1.35mm
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Increased robustness against vertical impacts
during manufacturing process
Lead-free finishing
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 CM1431 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.
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
The CM1431 is housed in space-saving, low-profile 8-,
12- and 16-lead TDFN packages with a 0.40mm pitch
and is available with lead-free finishing. This smaller
size TDFN package provides up to 42% board space
saving vs. the 0.50mm pitch TDFN packages.
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Electrical Schematic
100Ω
FILTER+ESDn*
FILTER+ESDn*
R
15pF
C
15pF
C
GND
* See Package/Pinout Diagram
1 of 4, 6 or 8 EMI/RFI + ESD Channels
for expanded pin information.
© 2006 California Micro Devices Corp. All rights reserved.
02/06/06
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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