INTRODUCTION
SNC573 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 and two 4-bit I/O ports. By programming through the tiny controller in SNC573, 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 and two 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