Product Description

The CM1412 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 micro phone port on a cellular telephone or similar device. Each high quality filter provides more than 35dB atten uation in the 800-2700 MHz range. These pi-style filters support bidirectional filtering, controlling EMI both to and from a microphone element. They also support AC signals, enabling audio signals to pass through without distortion.

特性 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 version available

Applications

? EMI filtering and ESD protection for headset microphone ports

? Wireless Handsets

? Handheld PCs / PDAs

? MP3 Players

? Digital Camcorders

? Notebooks

? Desktop PCs