LC72701M - Sanyo Semicon Device

LC72701M Serial Interface Dialler

CMOS LSI No. 5561 LC73701M Serial Interface Dialler Overview The LC73701M is a DTMP/pulse output dual-system dialer CMOS LSI for use in push-button telephones. It provides an on-chip serial interface and operates under the control of data sent over that serial interface. The LC73701M can be easily controlled by the system CPU using this dedicated interface.

Features

• Mode change and pause commands can also be stored as data in the buffer memory.
• Pauses can be inserted automatically on mode changes (auto-pause).
• A pause can be cancelled during that pause.
• The mode change function supports changing from pulse to tone (single direction).
• Generates all 16 DTMF signals.
• The pulse dialer output can be turned on or off arbitrarily.
• The pulse dialer output circuit can be selected to be either an n-channel open drain or a complementary circuit.
• The pulse dialer muting function can be turned on or off arbitrarily.
• A redial function is provided.
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