Yamaha YM2149F Sound Chip, DIP 40 Package

The YM2149 sound chip (also known as YM2149F or SSG – Sound and Square Generator) is a classic 3-channel sound generator from the 1980s, manufactured by Yamaha. It is a licensed version of the AY-3-8910 chip by General Instrument.

Applications

It was widely used in:

• home computers,
• consoles,
• arcade machines (e.g., Atari ST, Amstrad CPC, ZX Spectrum 128, MSX, Intellivision, Vectrex).

Characteristics

This PSG (Programmable Sound Generator) is a simple yet highly versatile chip that allows:

• square wave synthesis,
• noise generation,
• envelope creation.