Product Description
The CM1411 is a dual low-pass filter array integrating two pi-style filters (C-R-C) that reduce EMI/RFI emis sions while at the same time 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 800-2700 MHz range. These pi-style filters support bidirectional filtering, controlling 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 CMD’s 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 version available

APPLICATIONs
• EMI filtering and ESD protection for headset/speaker ports
• Wireless Handsets
• Handheld PCs / PDAs
• MP3 Players
• Digital Camcorders
• Notebooks
• Desktop PCs