| D8274 |  | Rochester Electronics LLC | 8274 - Multi-Protocol Serial Controller (MPSC) | PDF |   | 
| LD8274 |  | Rochester Electronics LLC | LD8274 - Multi Protocol Controller, 2 Channel(s), 0.107421875MBps, HMOS, CDIP40 | PDF |   | 
| MD82C59A/B |  | Rochester Electronics LLC | 82C59A - Interrupt Controller, 80C86, 80C88, 80C286, 8080, 8085, 8086, 8088, 80286, NSC800 Compatible, CMOS, CDIP28 | PDF |   | 
| MD82510/B |  | Rochester Electronics LLC | 82510 - Serial I/O Controller, CMOS, CDIP28 | PDF |   | 
| 8251A/BXA |  | Rochester Electronics LLC | 8251 - Programmable Communication Interface, NMOS, CDIP28 | PDF |   |