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