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 35dB 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.

FEATUREs
• Functionally and pin compatible with CMD’s CSPEMI202A
• OptiGuard™ 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 40dB attenuation at 1GHz
• +8kV ESD protection on each channel (IEC 61000-4-2 Level 4, contact discharge)
• +15kV 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, 0.930mm X 1.410mm footprint Chip Scale Package (CSP)
• Lead-free RoHS compliant

APPLICATIONs
• EMI filtering and ESD protection for headset microphone ports
• Wireless handsets
• Handheld PCs / PDAs
• MP3 players
• Digital camcorders
• Notebooks
• Desktop PCs