Akai MB8841-373M

Akai MB8841-373M is an NMOS 4-bit single-chip microcomputer that was manufactured by Fujitsu and used primarily as a system controller in vintage Akai audio equipment, such as reel-to-reel tape decks and synthesizers.

IC Details & Specifications

The "373M" suffix indicates a specific mask-programmed ROM version tailored for Akai's proprietary hardware requirements.

• Family: Fujitsu MB8840 Series (4-bit Microcomputer).
• Architecture: CMOS or NMOS logic depending on the specific production era, designed for low-speed control tasks.
• Functions: Handles front-panel button inputs, LED/display segment driving, and solenoid control for tape transport mechanisms.
• Replacement Note: Because this is a mask-programmed IC, it cannot be replaced by a generic MB8841. A direct replacement must carry the exact -373M suffix to ensure the software code matches your device's functionality.