YMZ284

The YMZ284 is a melody and effect sound generator LSI, having square wave, noise and envelope generators. The features of YMZ284 can be summarized as (1)three sequence square wave generators and one noise generator, software-compatible with the YM2149; (2)3 built-in 5-bit D/A convertors and mixed output; (3)CPU interface through/CS/WR control signal and 8 bit data bus; (4)wide voicing range of 8 octaves; (5)smooth attenuation by wide dynamic range envelope generator; (6)power down mode; (7)+5V single power supply, silicon gate CMOS process.

The absolute maximum ratings of the YMZ284 are:(1)power supply voltage: -0.3 to 7.0V; (2)input voltage: VSS-0.3 to VDD+0.3V; (3)storage temperature: -50 to 125.

The following is about the electrical characteristics of YMZ284: (1)input highlevel voltage: 2.2V min; (2)input lowlevel voltage: 0.8V max; (3)input highlevel voltage: 3.5V min; (4)input lowlevel voltage: 1.0V max; (5)input leak current: -10A min and 10A max; (6)pull-up registance: 60k min, 250k typical and 600k max; (7)input capacity: 10pF max; (8)power supply current: 10mA max.