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
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 - 100
Ω
- 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.
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
Electrical Schematic
EMI Filter + ESD Channel 1
CMD A1
100
Ω
C1 CMD
ESD Channel 1
A2
ESD Channel 2
C2
12pF
12pF
EMI Filter + ESD Channel 2
CLK
A3
100
Ω
C3
CLK
DAT0
A4
EMI Filter + ESD Channel 3
100
Ω
C4
DAT0
12pF
12pF
©
2005 California Micro Devices Corp. All rights reserved.
09/16/05
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
12pF
12pF
▲
www.cmd.com
1
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
