8-Bit MCU, 4.2MHz, 128B RAM, 4KB MROM, 22 I/O, DIP-28
8-Bit MCU, 4.2MHz, 128B RAM, 4KB MROM, 22 I/O, 5V, PDIP28
8-Bit MCU, 4.2MHz, MROM, 128B RAM, 22 I/O, PDSO-28