Seiko NPC Corporation | New Products

12 September 2005

NPC Ships the SM5956AF, the World's First Single-Package 6-Channel Input/Output Asynchronous Sample Rate Converter

Nippon Precision Circuits Inc. (NPC) has recently completed development of the SM5956AF, a 6-channel asynchronous sample rate converter (SRC) designed for use in automobile multimedia networking. The new product is now in volume production and shipping.

As a 6-channel sample rate converter, the SM5956AF makes it easy to apply audio data to automobile multimedia networks, providing a timely solution to the fast-growing trend toward DVDs and similar applications that use multiple channels and sampling rates. With the capability to asynchronously convert the sampling rate of each of the input/output signals for six channels, the SM5956AF removes any worries about the synchronization relationship and differences in the sampling rate between the set itself and its automobile multimedia network when data such as 5.1-channel surround signals is exchanged.

The input sampling rate of the SM5956AF has enough width to cover the range from 10 to 200 kHz. In addition, two of the six channels are equipped with a de-emphasis filtering function that, along with the digital audio interface output function, makes it easy to send data internally within the set as well as externally.

What's more, the SM5956AF comes in a 48-pin QFP package that dramatically reduces its size. As one example, the SM5956AF requires 66% less installation space than a configuration that uses an existing NPC product to provide functions equivalent to those of the SM5956AF.

The new SM5956AF not only allows you to implement applications using multiple channels and sampling rates designed for use in automobile multimedia networking -- typified by the Media Oriented Systems Transport (MOST) technology -- but it does so more easily and in a much smaller area.

The SM5956AF is just one more example of NPC's commitment to deploying products that simultaneously fill customer needs and address a variety of applications.

Product Overview

Name	Sample price (including tax)	Production and shipping schedule	Planned production quantity
SM5956AF	900 yen/unit (945 yen/unit)	Volume production and shipment have started	500,000 units/month

Major Features
·	Processing of data for six L/R channels (three 2-channel stereo systems)
·	Input sampling rate of 10 to 200 kHz
·	Output sampling rate of 30 to 50 kHz
·	Operable sampling rate conversion ratio Any value from x0.45 to x4.41 (when operating at 512 fso) Any value from x0.225 to x4.41 (when operating at 768 fso)
·	Asynchronous timing (clock input) for the input and output sides
·	System clock input System clock at the input side: 1 fsi (The LRCI terminal can also be used for this function.) System clock at the output side: 512 fso or 768 fso (The SCK terminal is used for input.)
·	De-emphasis filtering function
·	Direct mute function
·	Through mode for enabling direct output of input data
·	Digital audio interface output
·	Clocks for output data (LRCO, BCKO) LRCO rate: 1 fso BCKO rate: 64 fso (when operating at 512 fso) 48 fso (when operating at 768 fso) Slave mode: Outputs data according to signals input externally at the above rates Master mode: Internally generates the above rates and outputs them based on the system clock input at the output side.
·	Three-wire, serial MCU interface
·	5-V tolerant input terminal that enables direct input from a 5-V device.
·	Single 3.3-V power source
·	P48-pin QFP package

For more information, Sales Group TEL +81-3-6667-6601 FAX +81-3-6667-6611 sales@npc.co.jp

	About Nippon Precision Products Inc. (NPC) NPC commenced operations in 1975 as a semiconductor IC manufacturer within the SEIKO group. Corporate Headquarters: 15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan President: Yoshifumi Gomi



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