ONE Signetics 2651I , Programmable Communication controller, Ceramic CDIP28

(1 PC) 2651N SIGNETICS Serial IO/Communication Controller, MOS, PDIP28

(1 PC) SCN2661BC1A28 PHILIPS Serial I/O Controller, MOS, PLCC28

(1PC) SCN2661AC1N28 Serial I/O Controller, 1 Channel(s), 0.125MBps, NMOS, PDIP28

Philips Signetics DRAM Controller 1M X 1 Bipolar PDIP48 IC 74F1765N US Ship NOS

SCN2661BC1N28 SIGNETICS 2661N Serial I/O Controller 28-PIN UOS LAST ONE

ONE PC- IC Serial I/O Controller, D8251A, Intel, 1 Channel, CDIP28

TWO (2) Signetics SCN2651CC1N28 , Programmable Communication controller, PDIP28