CSPEMI205

• Three channels of EMI filtering, two for earpiece speakers and one for a microphone
• Pi-style EMI filters in a capacitor-resistor-capacitor (C-R-C) network
• Chip Scale Package features extremely low parasitic inductance for optimum filter performance
• Greater than 30dB relative attenuation in the 800-2700MHz range
• ±8kV ESD protection on each channel (IEC 61000-4-2 Level 4, contact discharge)
• ±15kV ESD protection on each channel (HBM)
• 8-bump, 1.41mm X 1.43mm footprint Chip Scale Package (CSP)
• RoHS compliant (lead-free) finishing

The CSPEMI205 is a low-pass filter array integrating three pi-style filters (C-R-C) that reduce EMI/RFI emissions while at the same time providing ESD protection. This device is custom-designed to interface with the headset port on a cellular telephone, and contains two different filter values. Each high quality filter provides more than 30dB attenuation in the 800-2700 MHz range. These pi-style filters support bidirectional filtering, controlling EMI both to and from the microphone and speaker elements. They also support bipolar signals, enabling audio signals to pass through without distortion.

In addition, the CSPEMI205 provides a very high level of protection for sensitive electronic components that may be subject to electrostatic discharge (ESD). The input pins safely dissipate ESD strikes of ±8kV, the maximum requirement of the IEC 61000-4-2 international standard. Using the MIL-STD-883 (Method 3015) specification for Human Body Model (HBM) ESD, the device provides protection for contact discharges to greater than ±15kV.

The CSPEMI205 is particularly well suited for portable electronics (e.g., cellular telephones, PDAs, notebook computers) because of its small package format and low weight. The CSPEMI205 is available in a space-saving, low-profile Chip Scale Package with RoHS compliant lead-free finishing.