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BUY UPD71054L-10 https://www.utsource.net/itm/p/11770115.html

Description: The UPD71054L-10 is a single-chip microcontroller from NEC Electronics. It is a 28-pin PLCC package and is based on the 8051 microcontroller architecture. Features: 8-bit CPU with 8051 instruction set 4K bytes of on-chip ROM 128 bytes of on-chip RAM 32-bit timer/counter 8-bit parallel port Serial port Interrupt controller Applications: Automotive systems Industrial control systems Home appliances Office automation systems Telecommunications systems (For reference only)