STMicroelectronics today introduces its new EMIF02-SPK02F2 filter, which provides filtering for the handset’s built-in speaker or a stereo headset output. A single EMIF02-SPK02F2 can also be connected to the microphone input to isolate the handset from external sources of noise, such as other cellphones.

With high attenuation and low series resistance, the new filters achieve greater noise reduction while preserving audio signal strength better than any other approach. Filters built using discrete components, for example, are difficult to design for tri-band handsets and typically occupy around 72% more board space than the EMIF02-SPK02F2. The EMIF02-SPK02F2 is in full production, and is available at $0.16 each for orders over 10,000 pieces.