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BUY AT89C5131A-S3SUM https://www.utsource.net/itm/p/8967508.html
IC MCU 8BIT 32KB FLASH 52PLCC
Description: The AT89C5131A-S3SUM is an 8-bit microcontroller from Atmel Corporation. It is based on the 8051 core and is designed for embedded applications. Features: 8051 core 8K bytes of Flash program memory 256 bytes of RAM 32 I/O lines 16-bit timer/counters Serial port SPI and I2C interfaces On-chip oscillator Power-saving sleep mode Application: The AT89C5131A-S3SUM is suitable for a wide range of embedded applications such as home automation, industrial control, security systems, and automotive applications. (For reference only)