BUY XR68C681CP https://www.utsource.net/itm/p/1407439.html
UART
Manufacturer: MAXLINEAR, INC. Package: DIP-40 Description: 8-Bit Microcontroller Features: 8-bit CMOS microcontroller On-chip RAM, ROM, and I/O 256 bytes of RAM 8K bytes of ROM 8-bit timer/counter 8-bit A/D converter 8-bit PWM Serial I/O Low power consumption Internal oscillator External memory interface Interrupts Power-down mode Operating voltage: 4.5V to 5.5V Application: The XR68C681CP is a 8-bit microcontroller designed for use in a variety of applications such as consumer, industrial, automotive, and medical. It can be used for embedded control, data acquisition, and communication applications. (For reference only)