Voice chip ISD4004 series launched in the United States ISD s products, with repeated playback, storage for a long time, when used without expanded memory, the required characteristics of the external circuit is simple. This will combine the chip ISD4004 Voice announcement device in a practical application, its features and use a little introduction, so that the reader use voice chip ISD4004 series have a basic understanding.

ISD4004 language recording.doc

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