Part Number: 89C51CC03UASLSUM (Atmel plcc44)Part Number: 89C51RC2SLSUM (Atmel plcc44)Part Number: AT80C51RD2SLSUMPBF (Atmel plcc44)Part Number: AT89C51AC2SLSUMPBF (Atmel plcc44)Part Number: AT89C55WD24JUPBF (Atmel plcc44)Part Number: AT89S52-24JUPBF (Atmel plcc44)Part Number: AT90S4414-8J (Atmel plcc44)