D5C031-40 Integrated Circuit - DIP20 - Intel

D82288-8 Integrated Circuit - DIP20 - Intel

HY534256S70 Integrated Circuit - DIP20 - Hyundai

54F533DMQB Integrated Circuit - DIP20 - Generic Make

MC54HC273AJ Integrated Circuit - DIP20 - Motorola Semiconductor

54AC377DMQB Integrated Circuit - DIP20 - National Semiconductor - NSC

ID82C82 Integrated Circuit - DIP20 - Harris Semiconductor

AM25LS2537PC Integrated Circuit - DIP20 - Analog Devices - AMD