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.
The dial pulse make ratio can be specified to be either 33 or 39%.
Wide operating voltage range Pulse mode: VDD = 1.5
