BUY M54583P https://www.utsource.net/itm/p/11722004.html

Manufacturer: Mitsubishi Package: DIP-18 Description: M54583P is a 4-bit single-chip microcomputer manufactured by Mitsubishi. Features: 4-bit single-chip microcomputer 8-bit CPU 4K bytes ROM 256 bytes RAM 8-bit timer 8-bit A/D converter Serial I/O Interrupt controller Clock oscillator On-chip voltage regulator Applications: Automotive systems Home appliances Industrial control systems Office automation systems Security systems (For reference only)