BUY SY2128-4 https://www.utsource.net/itm/p/11724139.html

The SY2128-4 is a 24-pin DIP (Dual Inline Package) microprocessor from Synertek. It is a 4-bit CMOS microprocessor with an 8-bit data bus. It has an internal ROM of 8K bytes and an internal RAM of 256 bytes. The SY2128-4 is designed for use in embedded control applications. It has an instruction set that includes arithmetic and logic operations, program branching, and data manipulation. It also has a wide range of I/O ports, including serial, parallel, and analog. The SY2128-4 is suitable for use in a variety of applications, including home appliances, industrial automation, medical equipment, and automotive systems. It is also suitable for use in embedded systems that require low power consumption and high performance. (For reference only)