CM1423 Datasheet, PDF (1/10 Pages) California Micro Devices Corp – Secure Digital (SD) Card EMI Filter Array with ESD Protection

CM1423
Secure Digital (SD) Card EMI Filter Array with ESD Protection
Features
• Provides EMI filtering and ESD protection for an
SD port on a mobile device
• Six channels of EMI filtering with ESD protection
• Four channels of ESD protection
• ±15kV ESD protection on all I/O pins (IEC 61000-
4-2, contact discharge)
• ±30kV ESD protection (HBM)
• Better than 25dB of attenuation at 1GHz for 12pF-
100Ω -12pF filter configuration
• Integrates 34 components into small form factor
CSP solution
• 20-bump, 4.000mm x 1.458mm footprint
Chip Scale Package
• Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
• Available with OptiGuard™ coated version for
improved reliability at assembly
• Lead-free version available
Applications
• Secure Digital (SD) Card data lines in mobile
handsets
• SD Card interface protection for other mobile elec-
tronics such as MP3 players, PDAs and digital
cameras
• 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
California Micro Devices's CM1423 is an EMI filter
array with ESD protection, which integrates six Pi- fil-
ters (C-R-C) and four channels of ESD protection. The
CM1423’s filters have component values of 12pF-
100Ω-12pF. The part includes ESD protection diodes
on every pin, which provide a very high level of protec-
tion for sensitive electronic components that may be
subjected to electrostatic discharge (ESD). All the
ESD diodes are designed and characterized to safely
dissipate ESD strikes of ±15kV, beyond the maximum
requirement of the IEC 61000-4-2 international stan-
dard. Using the MIL-STD-883 (Method 3015) specifica-
tion 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. mobile handsets, PDAs, notebook com-
puters) because of its small package format and easy-
to-use pin assignments. In particular, the CM1423 is
ideal for EMI filtering and protecting data lines from
ESD for the Secure Digital (SD) Card interface slot in
mobile handsets. The CM1423 is an all-inclusive solu-
tion for the SD card interface since its EMI filters pro-
vide the proper cut-off frequency to attenuate
unwanted signals.
The CM1423 is manufactured in a space-saving, low-
profile, chip-scale package, and is optionally available
with OptiGuard™ coating for improved reliability. It is
also available with lead-free finishing.
Electrical Schematic
DAT 2
A1
100Ω
12pF
C1
DAT 2
CLK
A5
12pF
100Ω
12pF
C5
12pF
CLK
VSS1*
A4
C4 _VDD*
DAT 3
A2
100Ω
12pF
C2 _{DAT 3 DAT 0} A7
12pF
100Ω
12pF
C7
12pF
DAT 0
ESD*
A6
C6 _VSS2*
CMD
A3
100Ω
12pF
C3 _{CMD DAT 1} A8
12pF
100Ω
12pF
C8
12pF
DAT 1
* In a typical SD Card application, A4 (A6)
is connected to C4 (C6). See example
given in applications section.
© 2005 California Micro Devices Corp. All rights reserved.
01/12/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: [phone] ▲ Fax: [phone] ▲ www.calmicro.com
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