INTRODUCTION

SNC578 is a two-channel voice synthesizer IC with PWM direct drive circuit. It built-in a 4-bit tiny controller with one 4-bit input port, two 4-bit output ports and three 4-bit I/O ports. By programming through the tiny controller in SNC578, user’s varied applications including voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented.

FEATURES

♦ Single power supply 2.4V – 5.5V

♦ 42 seconds voice capacity are provided(@6KHZ sample rate)

♦ Built in a 4-bit tiny controller

♦ One 4-bit input port, two 4-bit output ports and three 4-bit I/O ports are provided

♦ 128*4 bits RAM are provided

♦ 132K*10 ROM size are provided for voice data and program

♦ Maximum 16k program ROM is provided

♦ Readable ROM code data

♦ IR carrier signal is provided

♦ Built in a high quality speech synthesizer

♦ Adaptive playing speed from 2.5k-20kHz is provided

♦ Two independent voice channels (Channel 1 + Channel 2→Buo1,Buo2)

♦ Built in a PWM Direct Drive circuit and a fixed current D/A output

♦ System clock : 2MHz

♦ Low Power Reset