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It was sold as a sample to an engineering firm near me in 1995. It appears to have never been opened. The Atmel AT89C2051-24PU is an 8-bit microcontroller from the AT89 series, designed for digital output applications. It operates between -40°C to 85°C and comes in a 20-pin PDIP package for surface mount mounting. With a 24 MHz clock speed and 2 kB of flash memory, this unit is suitable for various electronic projects requiring a compact and reliable microcontroller solution.
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