MB81C4256A60P Integrated Circuit - DIP20 - Fairchild Semiconductor

54F241DM Integrated Circuit - DIP20 - Fairchild Semiconductor

CP82C86H Integrated Circuit - DIP20 - Harris Semiconductor

PAL14H4A2NC Integrated Circuit - DIP20 - National Semiconductor - NSC

MB7124 Integrated Circuit - DIP20 - Fuji Semiconductor

MC10H351P Integrated Circuit - DIP20 - Motorola Semiconductor

MC54HC273AJ Integrated Circuit - DIP20 - Motorola Semiconductor

IP82C87H Integrated Circuit - DIP20 - Harris Semiconductor