SM1155 Datasheet (Nippon Precision Circuits Inc)

SM1155, Melody LSIs

Number 1 2 Name T2 T1 i/o * Test pins (must be open) Melody mode control input S M 1 1 5 5 ×××1 S 3 TG ip 1 H S M 1 1 5 5 ×××2 S S M 1 1 5 5 ×××3 S L/open 4 5 6 7 8 VSS OUT OUT VDD TC * o * * Ground Piezoelectric speaker driver outputs.

Both pins are LOW in non-play m

SM1155 Features

* I I I I I I I I I I Requires few external components 1.2 to 3.6V wide operating voltage range Low power consumption 3 melody modes (bonding option) Oscillator stop function in non-play mode Power saving pull-down resistor built-in RC oscillator circuit Power-ON initialization function Wide pitch dy