Semiconductor integrated circuit for telephone

Details Semiconductor integrated circuit for telephone Semiconductor integrated circuit for telephone

H - Electricity

04

M

379/26

H04M 1/27 (2006.01)

Patent

CA 1298677

ABSTRACT OF THE DISCLOSURE An integrated semiconductor dialing circuit for push button telephone systems which is capable of entering an access wait-state pause and thereby providing semiautomatic access a wide variety of telephone dial-up services. The integrated circuit includes a keyboard intrface circuit, a memory circuit, a control circuit, a wait pause detection circuit, a signal outuput circuit and a status output circuit interconnected by a plurality of signal lines.

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