AT89S51-24PU Microcontroller 8051 Flash: 4kx8bit Static RAM: 128B Interface: UAR

AT89S51-24AU Microcontroller 8051 Flash: 4kx8bit Static RAM: 128B Interface: UAR

1 piece, IC: microcontroller 8051 AT89S51-24JU /E2UK

AT89S52-24JU Microcontroller 8051 Flash: 8kx8bit Static RAM: 256B Interface: UAR

AT89C55WD-24JU Microcontroller 8051 Flash: 20kx8bit Static RAM: 256B Interface:

AT89C4051-24PU Microcontroller 8051 Flash: 4kx8bit Static RAM: 128B Interface: U

AT89C4051-24SU Microcontroller 8051 Flash: 4kx8bit Static RAM: 128B Interface: U

AT89C51RC-24JU Microcontroller 8051 Flash: 32kx8bit Interface: UART 4-5.5VDC MIC