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NEC unveils latest single-chip solutions for mobile phones

Posted: 21 Oct 2004 ?? ?Print Version ?Bookmark and Share

Keywords:nec electronics? lsi solution? upd9993? upd9996? upd9990?

NEC unveils latest single-chip solutions for mobile phones

NEC Electronics Corp. and its subsidiaries in the U.S. and Europe announced the launch of three single-chip melody LSI solutions that offer "superior sound technology" for mobile phones.

The product line-up consists of the ?PD9993 chip, which offers 64 polyphonic tones; the ?PD9996 chip for low-end monaural (single-speaker) mobile phones, which is pin-compatible with the company's ?PD9990/1/2 series of melody solutions; and the ?PD9995 chip, a class monaural chip first introduced in September 2003.

The ?PD9993 chip incorporates a DSP core for MP3 and AAC decoding, which enables playback of audio files in high-quality MP3 and AAC formats in addition to conventional musical instrument digital interface (MIDI) format. Incorporating a DSP core eliminates the need for an additional LSI chip to support these functions, NEC explained. This device also employs leading surround sound from DiMAGIC's Adaptive Surround Technology, which processes two audio channels to produce five channels of stereo-wide surround sound. According to the company, these features significantly enhance the sound quality in mobile phones, allowing users listening through headphones to enjoy music stored in their phones at CD quality, or to use songs instead of ring tones to indicate an incoming call.

The ?PD9996 chip provides specialized monaural (single-speaker) functions while eliminating high-end functions such as surround sound and external digital input/output (I/O) to offer an affordable sound synthesizer solution. It has a pin layout compatible with the ?PD9990/1/2 melody chips, which enables manufacturers to develop low-end mobile phones based on their existing ?PD9990/1/2 designs.

The ?PD9995 offers monaural playback in a smallest-in-class package of 4.38-by-4.38mm. An optimized design configuration has reduced the pin count to 48, resulting in a 50 percent smaller package.

"Today, as mobile phones become increasingly advanced, many consumers want to enjoy high-quality sound using their phones as audio playback units," commented Masakazu Yamashina, GM for NEC's Mobile Systems Division. "NEC Electronics' latest melody solutions are designed to meet this demand, and we intend to continue expanding our line-up of products and support for this growing market."

Samples of the ?PD9993, ?PD9995 and ?PD9996 chips are already available. The unit price for ?PD9993 samples is $15, and the unit price for ?PD9996 and ?PD9995 samples is $5 each. Volume production is scheduled to start next month, with combined production for all three models expected to reach two million units per month by March of next year. More information can be found at the company's website.

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