SM8230A Datasheet (Nippon Precision Circuits Inc)

SM8230A, Tone Dialer

Number 1 2 3 4 5 6 7 8 Name SD SCL OE VSS CLK BZL BZH VDD I/O I I I * I O O * Serial data input Serial data transfer clock input.

(For valid transfer, OE must stay LOW for 16 clock cycles.) DTMF output enable/serial data transfer select input.

Serial data transfer is selected when LO

SM8230A Features

* a built-in piezo-electric speaker driver for direct connection to a piezo-electric buzzer. The DTMF frequencies can be set to correspond to the DTMF standards of any country. The output level is also adjustable under software control. These features, combined with its small package and low power dis