HCD404669 Datasheet | Hitachi Semiconductor

.. HD404669 Series Low-Voltage AS Microputers with On-Chip DTMF Generation Circuit ADE-202-083B Rev. 3.0 Sept. 1999 Description The HD404669 Series microputers incorporate a DTMF generation circuit, two parators, and a serial interface on chip. They also provide input and output pins with large current handling capacities. Thus they are 4-bit single-chip microputers that are optimal for use in multifunction telephones, cordless telephones, and other munications equipment. HD404669 Series microputers have a 32.768 kHz sub-oscillator for realtime clock use, providing a time counting facility, and a variety of power supply modes to reduce current drain....