CM1414 Datasheet, PDF (1/6 Pages) California Micro Devices Corp – 2 Channel Headset EMI Filter with ESD Protection

CM1414
2 Channel Headset EMI Filter with ESD Protection
Features
• Functionally and pin compatible with CMD’s
CSPEMI204
• OptiGuard™ coated for improved reliability at
assembly
• Two channels of EMI filtering, one for a micro-
phone and one for an earpiece speaker
• Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
• Greater than 35dB attenuation in the 800-
2700MHz range
• +8kV ESD protection on each channel (IEC 61000-
4-2 Level 4, contact discharge)
• +15kV ESD protection on each channel (HBM)
• Chip Scale Package features extremely low para-
sitic inductance for optimum filter performance
• 5-bump, 0.950mm X 1.41mm footprint
Chip Scale Package (CSP)
• Lead-free version available
Applications
• EMI filtering and ESD protection for headset micro-
phone and earpiece speaker ports
• Cellular / Mobile Phones
• Notebooks and Personal Computers
• Handheld PCs / PDAs / Tablets
• Wireless Handsets
• Digital Camcorders
Product Description
The CM1414 is a low-pass filter array designed specifi-
cally to reduce EMI/RFI emissions and provide ESD
protection for a headset port on a cellular and mobile
devices. The CM1414 integrates two high quality, pi-
style filters (C-R-C) filters, one for a microphone and
one for an earpiece or speaker, each providing more
than 35dB attenuation relative to the pass band attenu-
ation in the 800-2700 MHz range. These filters support
bidirectional filtering, reducing EMI both to and from
the headset port and support bipolar audio signals
without distortion.
In addition, the CM1414 provides a very high level of
protection for sensitive electronic components that may
be subject to electrostatic discharge (ESD). The input
pins are designed and characterized to safely dissipate
ESD strikes of +8kV contact discharge, 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 device
provides protection for contact discharges to greater
than +15kV. The CM1414 protects sensitive compo-
nents such as CPU and DSPs that have much weaker
internal ESD protection circuitry usually only intended
for mechanical handling protection.
The CM1414 is particularly well suited for portable
electronics because of its small package format and
low weight. The CM1414 incorporates OptiGuard™
coating which results in improved reliability at assem-
bly and is available in a space-saving, low-profile Chip
Scale Package with optional lead-free finishing.
Electrical Schematic
EAR_IN ^A1
10 Ω
C1 _{EAR_OUT}
MIC_IN ^A3
68 Ω
C3 _{MIC_OUT}
GND ^B2
© 2005 California Micro Devices Corp. All rights reserved.
11/03/05 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: [phone] ● Fax: [phone] ● www.calmicro.com 1