SM8230A - Nippon Precision Circuits Inc

SM8230A Tone Dialer with Built-in Piezo Driver

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 LOW. Ground System clock input. The clock can be set to one of four frequencie.

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 dissipation, make the SM8230A a very use device to use. SD SCL OE VSS 1 8 VDD BZH BZL 8230AS 4 5 CLK PACKAGE DIMENSIONS FEATURES s s s s s s s 3-line serial interface to external CPU 2 independent, adjustable frequency outputs Piezo driver for direct connection to a piezoelectric buzzer 4.