YAMAHA YMZ294 YMZ284 SSGL SSGLP Real Chip
What is it?
The YMZ294 and YMZ284 are compact Yamaha PSG sound source LSIs, software-compatible with the YM2149 (SSG). Both chips feature three square wave tone generators, one noise generator, and an envelope generator — delivering the classic chiptune sound beloved by retro hardware enthusiasts and makers alike.
Available as bare chips (SSGL for YMZ284, SSGLP for YMZ294) or bundled with the RE2-YMZ284/294 Sound Card for immediate use with SPFM-compatible systems.
Key Features
- 3 square wave tone channels + 1 noise channel
- Built-in 3 × 5-bit DACs for 3-tone mixing output
- General-purpose CPU interface: CS, WR control signals + 8-bit data bus
- Wide 8-octave sound range
- Smooth decay from built-in envelope generator
- 5V single power supply — simple to integrate
- Through-hole DIP18 package — easy to socket and swap
- Software compatible with YM2149 / AY-3-8910 register set
Main Specifications
- Type: Sound source IC (PSG)
- Power supply voltage: 4.75V – 5.25V
- Operating temperature: 0°C – 70°C
- Mounting type: Through hole
- Package: DIP18
Variants
- YMZ284 (SSGL): Standard compact PSG, single 5V supply, no external clock needed
- YMZ294 (SSGLP): Enhanced variant with additional features, +$1.00
Options
- Chip only: Bare chip for your own projects, breadboards, or custom PCBs
- RE2-YMZ284/294 Sound Card: Ready-to-use RE:birth 2nd compatible sound card for SPFM series motherboards
Compatible Software & Projects
- Psgino — PSG music player library
- YMZ294-seq — YMZ294 sequencer project
Why Real Chips?
Emulation can approximate the sound, but nothing beats the authentic analog character of a real Yamaha PSG chip. Whether you're building a retro computer, a chiptune synthesizer, or a SPFM sound module, these chips deliver the genuine article — warm, characterful square waves with that unmistakable Yamaha PSG signature.
Long-term stock, fair pricing, no mystery shops — available to makers and enthusiasts worldwide.