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BUY XR88C681CP/40 https://www.utsource.net/itm/p/408518.html
CMOS DUAL CHANNEL UART DUART
The XR88C681CP/40 is a microcontroller from Exar Corporation. It is a 40-pin DIP package and is based on the 8051 architecture. Description: The XR88C681CP/40 is a high-performance 8-bit microcontroller with an 8-bit CPU core, 8K bytes of on-chip program memory, 256 bytes of RAM, and a variety of peripherals. It has an 8-bit data bus and a 16-bit address bus, allowing it to address up to 64K bytes of external memory. It also features an integrated UART, SPI, and I2C interfaces, as well as an 8-bit timer/counter and programmable watchdog timer. Features: 8-bit CPU core 8K bytes of on-chip program memory 256 bytes of RAM 8-bit data bus and 16-bit address bus Integrated UART, SPI, and I2C interfaces 8-bit timer/counter and programmable watchdog timer 40-pin DIP package Applications: The XR88C681CP/40 is suitable for a variety of applications, including industrial automation, consumer electronics, automotive, and medical devices. It can be used for data acquisition, control, and communication applications. (For reference only)