ESD Protected Analog PI Filter Multiple Channels SWPIESD-20X X 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 bipolar signals—ideal
for audio applications EMI filtering and ESD protection for headset microphone ports Wireless Handsets Wireless Handsets Handheld PCs / PDAs MP3 Players, Notebooks, Desktop PCs, Digital Camcorders SWPIESD-20X is a dual low-pass filter array integrating four 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 a microphone 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 the speaker elements. They also support bipolar signals, enabling audio signals to pass through without distortion. In addition, the SWPIESD-20X provides a very high level of protection for sensitive electronic components that may be subject to electrostatic discharge (ESD). The input pins are designed and characterized to 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 SWPIESD-20X is particularly well suited for portable electronics (e.g., cellular telephones, PDAs, notebook computers) because of its small package format and low weight.