UM9l20 microcomputer dialing integrated circuit diagram

Published:2011/5/6 22:59:00 Author:Nicole | Keyword: microcomputer, dialing | From:SeekIC

UM9l20 is a microcomputer dialing integrated circuit, it is used in all kinds of telephone circuit of communication. UM9l20 integrated circuit contains pulse/double audio frequency compatible dialing, key switch singal compiling decoding circuit, silence suppression circuit, the pin function and data of this integrated circuit is shown in the table 1-1.



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