CM1424 Datasheet, PDF (1/8 Pages) California Micro Devices Corp – MultiMedia Card EMI Filter Array with ESD Protection

CM1424
MultiMedia Card EMI Filter Array with ESD Protection
Features
• Three channels of EMI filtering, each with ESD
protection
• Two channels of ESD protection
• Flow-through routing for MMC interface
• ±15kV ESD protection (IEC 61000-4-2, contact
discharge)
• ±30kV ESD protection (HBM)
• Greater than 30dB of attenuation at 1GHz
• Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
• 10-bump, 1.998mm x 1.458mm footprint Chip
Scale Package (CSP)
• Available with OptiGuard™ coating for improved
reliability
• Lead-free version available
Applications
• MultiMedia Card (MMC) slot in mobile handsets
and other handheld devices such as digital cam-
eras and MP3 players
• I/O port protection for mobile handsets, notebook
computers, PDAs etc.
• EMI filtering for data ports in cell phones, PDAs or
notebook computers
Product Description
The CM1424 is an EMI filter array integrating 3 pi-filters
(C-R-C) and 2 channels of ESD protection. The
CM1424 has component values of 12pF - 100Ω - 12pF.
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 diodes con-
nected to the filter ports safely dissipate ESD strikes of
±15kV, 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.
The ESD diodes on pins A2 and C2 safely dissipate
ESD strikes of ±15kV, well beyond the maximum
requirement of the IEC 61000-4-2 international stan-
dard.
This device is particularly well-suited for portable elec-
tronics (e.g. mobile handsets, PDAs, notebook comput-
ers) because of its small package and easy-to-use pin
assignments. In particular, the CM1424 is ideal for EMI
filtering and protecting data lines from ESD for the Mul-
tiMedia Card (MMC) slot in mobile handsets.
The CM1424 devices are optionally available with Opti-
Guard™ coating which results in improved reliability.
The CM1424 is available in space-saving, low-profile,
chip-scale packages with optional lead-free finishing.
Electrical Schematic
EMI Filter + ESD Channel 1
CMD ^A1
100 Ω
C1 _CMD
ESD Channel 1
A2
ESD Channel 2
C2
EMI Filter + ESD Channel 2
CLK ^A3
100 Ω
C3 _CLK
EMI Filter + ESD Channel 3
DAT0 ^A4
100 Ω
C4 _DAT0
© 2005 California Micro Devices Corp. All rights reserved.
09/16/05 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: [phone] ▲ Fax: [phone] ▲ www.cmd.com
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