© Semiconductor Components Industries, LLC, 2011
March, 2011 − Rev. 4
1 Publication Order Number:
CM1412/D
CM1412
2-Channel Headset
/ Microphone EMI Filter
Array with ESD Protection
Product Description
The CM1412 is a dual, low−pass filter array integrating two pi−style
filters (C−R−C) that reduce EMI/RFI emissions while providing ESD
protection. This part is custom−designed to interface with
a microphone port on a cellular telephone or similar device. Each high
quality filter provides more than 35 dB attenuation in the 800 to
2700 MHz range. These pi−style filters support bidirectional filtering
that control EMI both to and from a microphone element. They also
support AC signals, enabling audio signals to pass through without
distortion.
In addition, the CM1412 provides a very high level of protection for
sensitive electronic components that may be subjected to electrostatic
discharge (ESD). The input pins safely dissipate ESD strikes of ±8kV,
the maximum requirement of the IEC 61000−4−2 international
standard. Using the MIL−STD−883 (Method 3015) specification for
Human Body Model (HBM) ESD, the device provides protection for
contact discharges to greater than ±15 kV.
The CM1412 is particularly well suited for portable electronics
(e.g., cellular telephones, PDAs, notebook computers) because of its
small package format and low weight. The CM1412 incorporates
OptiGuardt
coating which results in improved reliability at assembly
and is available in a space−saving, low−profile Chip Scale Package
with lead−free finishing.
Features
• Functionally and Pin Compatible with ON Semiconductor’s
CSPEMI202A
• OptiGuardt Coated for Improved Reliability at Assembly
• Two Channels of EMI Filtering
• Pi−Style EMI Filters in a Capacitor−Resistor−Capacitor (C−R−C)
Network
• Greater than 40 dB Attenuation at 1 GHz
• ±8 kV ESD Protection on Each Channel
(IEC 61000−4−2 Level 4, Contact Discharge)
• ±15 kV ESD Protection on Each Channel (HBM)
• Supports AC Signals−Ideal for Audio Applications
• Chip Scale Package Features Extremely Low Lead Inductance for
Optimum Filter and ESD Performance
• 5−Bump, 0.930 mm X 1.410 mm Footprint Chip Scale Package
(CSP)
• These Devices are Pb−Free and are RoHS Compliant
Applications
• EMI Filtering and ESD Protection for Headset
Microphone Ports
• Wireless Handsets
• Handheld PCs / PDAs
• MP3 Players
• Digital Camcorders
• Notebooks
• Desktop PCs
MARKING DIAGRAM
Device Package Shipping
†
ORDERING INFORMATION
http://onsemi.com
CM1412−03CP WLCSP5
(Pb−Free)
3500/Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
WLCSP5
CP SUFFIX
CASE 567AZ
CB = CM1412−03CP
BLOCK DIAGRAM
68 W
A1
47 pF47 pF
C
C
R
MIC_OUT1
MIC_IN1
C1
68 W
A3
47 pF47 pF
C
C
R
MIC_OUT2
C3
MIC_IN2
GND
B2
CB
