| MD82510/B |  | Rochester Electronics LLC | 82510 - Serial I/O Controller, CMOS, CDIP28 | PDF |   | 
| MR82510/B |  | Rochester Electronics LLC | 82510 - Serial I/O Controller, CMOS | PDF |   | 
| MD8251A |  | Rochester Electronics LLC | 8251A - Serial I/O Controller, 2 Channel(s), 0.078125MBps, HMOS, CDIP28 | PDF |   | 
| MD8251A/B |  | Rochester Electronics LLC | 8251A - Serial I/O Controller, 2 Channel(s), HMOS, CDIP28 - Dual marked (5962-8754802XA) | PDF |   | 
| MR8251A/B |  | Rochester Electronics LLC | 8251A - Serial I/O Controller, 2 Channel(s), HMOS, CDIP28 - Dual marked (5962-87548023A) | PDF |   |