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Tuesday, October 08, 2002
Cirrus' Digital Audio interface products target emerging DVD-Audio market

Cirrus Logic, Inc recently introduced two new digital audio interface products for the professional and consumer audio markets. The CS8416 192kHz digital audio receiver and the CS8406 192kHz digital audio transmitter are said to provide manufacturers with the capability to support 192kHz and DVD-Audio features. The CS8416 features extremely low jitter performance of 200ps. Target applications for both products include audio video receivers (AVR) and DVD receivers with DVD-Audio capability, DVD recorder systems, personal video recorders (PVR), multi-media speakers, digital mixing consoles and automotive audio systems.

According to Terry Leeder, vice president of sales and marketing for Cirrus Logic, the two products work together to help manufacturers enhance audio performance for rapidly emerging DVD-Audio products.

The CS8416 receives and decodes digital audio data with sample rates up to 192kHz and utilizes a very low jitter clock recovery mechanism to yield a clean recovered clock from the incoming audio stream. An 8:2 input multiplexer allows for up to eight digital audio input sources and the second output of the multiplexer provides a SPDIF pass-through feature for added system flexibility.

It integrates auto-detection of compressed audio input streams and CD-Q sub-code decode and also allows for selectable signal routing to three general purpose output (GPO) leads.

The CS8406 digital audio transmitter accepts and encodes audio and digital data, which is then multiplexed, encoded and driven onto a cable/optical transmission interface. The device also has a flexible three-wire serial digital audio input port and on-chip channel status, plus user bit buffer memories that allow block-sized updates without the need for external memory.

In addition, it includes an on-chip low-skew, low-impedance, differential line driver that allows the user to drive longer cable lengths. It is also lead compatible with the CS8405A 96kHz digital audio transmitter.

The CS8416 and CS8406 are priced at US$2.56 and US$1.99 respectively for OEM quantities of 10,000. Both devices are available in 28-lead SOIC and TSSOP packages.

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