8-Bit 8051 MCU, 40MHz, 64KB FLASH, 512B RAM, 32 I/O, PDIP40
8-Bit 8051 MCU, 40MHz, FLASH, 40-Pin PDIP
8-Bit 8051 MCU, 40MHz, 64KB FLASH, 512B RAM, PQFP44
8-Bit 8051 MCU, 40MHz, 64KB FLASH, 512B RAM, 36 I/O, PQCC44