Product Description
The CM1411 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 speaker 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 speaker element. They also support AC signals with a cutoff frequency of 31MHz, enabling audio signals to pass through without distortion.

FEATUREs
• Functionally and pin compatible with the CSPEMI201A
• 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 in each channel (HBM)
• Supports AC signals—ideal for audio applications
• Extremely low lead inductance for optimum filter and ESD performance
• 5-bump, 0.950mm X 1.410mm footprint Chip Scale Package (CSP)
• Lead-free RoHS compliant

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