1194:
223:
242:
RS-423 specifies the electrical characteristics of a single unbalanced signal. The standard was written to be referenced by other standards that specify the complete DTE/DCE interface for applications which require a unbalanced voltage circuit to transmit data.
234:
standard, both of which use the same overall signaling system, but differ in that RS-422 has a dedicated return line for every data pin, while RS-423 uses a single return line. Use of a common ground is one weakness of RS-423 (and
166:, with a single, unidirectional sending driver, and allowing for up to 10 receivers. It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between
239:): if devices are far enough apart or on separate power systems, the ground will degrade between them and communications will fail, resulting in a condition that is difficult to trace.
151:, which used the same signaling systems but on a different wiring arrangement: RS-423 differed primarily in that it had a single return pin instead of one for each data pin.
378:"V.10 : Electrical characteristics for unbalanced double-current interchange circuits operating at data signalling rates nominally up to 100 kbit/s"
1189:
Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the fastest.
202:
specify the electrical characteristics of the unbalanced voltage digital interface circuit. RS-423 provides for data transmission, using
634:
1162:
791:
654:
140:
that specifies electrical characteristics of a digital signaling circuit. Although it was originally intended as a successor to
461:
364:
183:
842:
513:
548:
895:
734:
664:
171:
724:
822:
414:
National
Semiconductor Application Note AN-1031 "TIA/EIA-422-B Overview", January 2000, National Semiconductor Inc.
377:
614:
295:
137:
1166:
817:
786:
279:
147:
RS-423 systems can transmit data on cables as long as 1,200 meters (3,900 ft). It is closely related to
439:
402:
TIA/EIA STANDARD, Electrical
Characteristics of Unbalanced Voltage Digital Interface Circuits, TIA/EIA-423-B
764:
246:
These other standards would define protocols, connectors, pin assignments and functions. Standards such as
1090:
1029:
884:
689:
454:
1059:
744:
1197:
1172:
1064:
719:
167:
1221:
754:
211:
207:
159:
188:
ANSI/TIA/EIA-423-B Electrical
Characteristics of Unbalanced Voltage Digital Interface Circuits
1216:
1018:
971:
827:
599:
447:
315:
283:
1014:
867:
749:
8:
926:
481:
434:
470:
203:
155:
916:
538:
474:
360:
429:
649:
779:
629:
609:
484:
413:
199:
1080:
774:
699:
624:
528:
503:
259:
1210:
1152:
1039:
931:
879:
862:
644:
543:
533:
508:
469:
275:
889:
832:
684:
589:
1157:
1136:
1054:
899:
837:
812:
739:
523:
518:
976:
1010:
709:
498:
1034:
1024:
991:
986:
921:
796:
584:
569:
564:
271:
214:
or non-terminated transmission lines, point to point, or multi-drop.
1044:
981:
714:
574:
310:
305:
1177:
1131:
1115:
941:
759:
704:
639:
594:
255:
247:
222:
141:
416:
page 2 - evaluate the combination of cable length and data rate.
1110:
1001:
966:
956:
951:
769:
659:
619:
579:
300:
236:
231:
163:
148:
1095:
1006:
1105:
996:
936:
874:
847:
729:
679:
604:
251:
1100:
1085:
946:
857:
852:
694:
335:
1049:
674:
669:
144:
offering greater cable lengths, it is not widely used.
355:
Buchanan W.J. (2004) RS-422, RS-423 and RS-485. In:
357:The Handbook of Data Communications and Networks.
1208:
286:connector. This was sometimes called "DEC-423".
792:Coherent Accelerator Processor Interface (CAPI)
455:
210:signals, with unidirectional/non-reversible,
136:, is a technical standard originated by the
226:Guidelines for data rate versus line length
462:
448:
262:connector) use RS-423 electrical signals.
395:
182:RS-423 is the common short form title of
435:Diagram of pin connections for BBC micro
221:
1209:
443:
184:American National Standards Institute
13:
423:
274:computer uses RS-423 with a 5-pin
217:
14:
1233:
230:RS-423 is closely related to the
190:and its international equivalent
177:
16:Standard for serial communication
1193:
1192:
59:10 (1 driver & 10 receivers)
265:
192:ITU-T Recommendation T-REC-V.10
407:
370:
349:
328:
296:Electronic Industries Alliance
138:Electronic Industries Alliance
1:
787:Intel Ultra Path Interconnect
321:
51:Point-to-point, Multi-dropped
765:Intel QuickPath Interconnect
755:Direct Media Interface (DMI)
67:1200 meters (4000 feet)
7:
289:
282:used it extensively with a
10:
1238:
750:Compute Express Link (CXL)
1186:
1145:
1124:
1073:
987:IEEE-1284 (parallel port)
909:
902:logical device interface)
805:
557:
491:
119:
111:
103:
95:
87:
79:
75:Single-ended (unbalanced)
71:
63:
55:
47:
39:
34:
26:
21:
162:) interface, similar to
549:List of bus bandwidths
227:
43:Group of copper cables
359:Springer, Boston, MA.
316:List of network buses
284:Modified Modular Jack
225:
992:IEEE-1394 (FireWire)
730:PCI Extended (PCI-X)
430:RS-423 specification
154:RS-423 specifies an
91:-6V to +6V (maximum)
35:Protocol information
833:Parallel ATA (PATA)
740:PCI Express (PCIe)
228:
198:. These technical
1204:
1203:
1190:
917:Apple Desktop Bus
894:PCI Express (via
853:Serial ATA (SATA)
539:Network on a chip
365:978-1-4757-1067-0
127:
126:
112:Available signals
80:Maximum baud rate
72:Mode of operation
1229:
1196:
1195:
1188:
650:HP Precision Bus
464:
457:
450:
441:
440:
417:
411:
405:
399:
393:
392:
390:
388:
374:
368:
353:
347:
346:
344:
343:
332:
194:, also known as
186:(ANSI) standard
132:, also known as
64:Maximum distance
48:Network topology
19:
18:
1237:
1236:
1232:
1231:
1230:
1228:
1227:
1226:
1207:
1206:
1205:
1200:
1191:
1182:
1141:
1120:
1069:
982:IEEE-488 (GPIB)
905:
801:
780:Infinity Fabric
610:Europe Card Bus
553:
487:
468:
426:
424:Further reading
421:
420:
412:
408:
400:
396:
386:
384:
376:
375:
371:
354:
350:
341:
339:
334:
333:
329:
324:
292:
268:
254:connector) and
220:
218:Characteristics
180:
120:Connector types
83:Up to 100kbit/s
56:Maximum devices
17:
12:
11:
5:
1235:
1225:
1224:
1219:
1202:
1201:
1187:
1184:
1183:
1181:
1180:
1175:
1170:
1160:
1155:
1149:
1147:
1143:
1142:
1140:
1139:
1134:
1128:
1126:
1122:
1121:
1119:
1118:
1113:
1108:
1103:
1098:
1093:
1091:Intel HD Audio
1088:
1083:
1081:ADAT Lightpipe
1077:
1075:
1071:
1070:
1068:
1067:
1062:
1057:
1052:
1047:
1042:
1037:
1032:
1027:
1022:
1004:
999:
994:
989:
984:
979:
974:
969:
964:
959:
954:
949:
944:
939:
934:
929:
924:
919:
913:
911:
907:
906:
904:
903:
892:
887:
882:
877:
872:
871:
870:
865:
855:
850:
845:
840:
835:
830:
825:
820:
815:
809:
807:
803:
802:
800:
799:
794:
789:
784:
783:
782:
775:HyperTransport
772:
767:
762:
757:
752:
747:
742:
737:
732:
727:
722:
717:
712:
707:
702:
697:
692:
687:
682:
677:
672:
667:
662:
657:
652:
647:
642:
637:
632:
627:
622:
617:
612:
607:
602:
597:
592:
587:
582:
577:
572:
567:
561:
559:
555:
554:
552:
551:
546:
541:
536:
531:
529:Bus contention
526:
521:
516:
511:
506:
504:Front-side bus
501:
495:
493:
489:
488:
485:computer buses
467:
466:
459:
452:
444:
438:
437:
432:
425:
422:
419:
418:
406:
394:
369:
348:
326:
325:
323:
320:
319:
318:
313:
308:
303:
298:
291:
288:
267:
264:
219:
216:
179:
178:Standard scope
176:
125:
124:
121:
117:
116:
113:
109:
108:
105:
101:
100:
97:
93:
92:
89:
85:
84:
81:
77:
76:
73:
69:
68:
65:
61:
60:
57:
53:
52:
49:
45:
44:
41:
40:Physical media
37:
36:
32:
31:
28:
24:
23:
15:
9:
6:
4:
3:
2:
1234:
1223:
1222:EIA standards
1220:
1218:
1215:
1214:
1212:
1199:
1185:
1179:
1176:
1174:
1171:
1168:
1164:
1161:
1159:
1156:
1154:
1153:Multidrop bus
1151:
1150:
1148:
1144:
1138:
1135:
1133:
1130:
1129:
1127:
1123:
1117:
1114:
1112:
1109:
1107:
1104:
1102:
1099:
1097:
1094:
1092:
1089:
1087:
1084:
1082:
1079:
1078:
1076:
1072:
1066:
1063:
1061:
1060:External PCIe
1058:
1056:
1053:
1051:
1048:
1046:
1043:
1041:
1040:Parallel SCSI
1038:
1036:
1033:
1031:
1028:
1026:
1023:
1020:
1016:
1012:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
973:
970:
968:
965:
963:
960:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
933:
932:Commodore bus
930:
928:
925:
923:
920:
918:
915:
914:
912:
908:
901:
897:
893:
891:
888:
886:
883:
881:
880:Fibre Channel
878:
876:
873:
869:
866:
864:
861:
860:
859:
856:
854:
851:
849:
846:
844:
841:
839:
836:
834:
831:
829:
826:
824:
821:
819:
816:
814:
811:
810:
808:
804:
798:
795:
793:
790:
788:
785:
781:
778:
777:
776:
773:
771:
768:
766:
763:
761:
758:
756:
753:
751:
748:
746:
743:
741:
738:
736:
733:
731:
728:
726:
723:
721:
718:
716:
713:
711:
708:
706:
703:
701:
698:
696:
693:
691:
688:
686:
683:
681:
678:
676:
673:
671:
668:
666:
663:
661:
658:
656:
653:
651:
648:
646:
643:
641:
638:
636:
633:
631:
628:
626:
623:
621:
618:
616:
613:
611:
608:
606:
603:
601:
598:
596:
593:
591:
588:
586:
583:
581:
578:
576:
573:
571:
568:
566:
563:
562:
560:
556:
550:
547:
545:
544:Plug and play
542:
540:
537:
535:
534:Bus mastering
532:
530:
527:
525:
522:
520:
517:
515:
512:
510:
509:Back-side bus
507:
505:
502:
500:
497:
496:
494:
490:
486:
483:
479:
477:
472:
465:
460:
458:
453:
451:
446:
445:
442:
436:
433:
431:
428:
427:
415:
410:
403:
398:
383:
379:
373:
366:
362:
358:
352:
337:
331:
327:
317:
314:
312:
309:
307:
304:
302:
299:
297:
294:
293:
287:
285:
281:
277:
276:DIN connector
273:
263:
261:
257:
253:
249:
244:
240:
238:
233:
224:
215:
213:
209:
205:
201:
197:
193:
189:
185:
175:
173:
169:
165:
161:
157:
152:
150:
145:
143:
139:
135:
131:
123:Not specified
122:
118:
114:
110:
106:
102:
98:
94:
90:
86:
82:
78:
74:
70:
66:
62:
58:
54:
50:
46:
42:
38:
33:
29:
25:
20:
1217:Serial buses
961:
685:TURBOchannel
475:
409:
401:
397:
385:. Retrieved
381:
372:
356:
351:
340:. Retrieved
338:. foldoc.org
330:
269:
266:Applications
245:
241:
229:
208:single-ended
195:
191:
187:
181:
160:single-ended
153:
146:
133:
129:
128:
1158:CoreConnect
1137:ExpressCard
1065:Thunderbolt
1055:Camera Link
838:Bus and Tag
524:Address bus
519:Control bus
514:Daisy chain
134:TIA/EIA-423
115:Tx, Rx, GND
1211:Categories
1011:ACCESS.bus
910:Peripheral
710:InfiniBand
705:HP GSC bus
499:System bus
404:, May 1993
342:2021-07-08
322:References
212:terminated
204:unbalanced
156:unbalanced
107:+4V to +6V
99:-4V to -6V
30:EIA RS-423
972:Lightning
922:Atari SIO
797:SpaceWire
630:Zorro III
570:S-100 bus
565:SS-50 bus
558:Standards
478:standards
471:Technical
336:"EIA-423"
272:BBC Micro
200:standards
1198:Category
1173:Wishbone
1146:Embedded
1125:Portable
1045:Profibus
977:DMX512-A
863:Parallel
715:Ethernet
625:Zorro II
575:Multibus
476:de facto
367:page 627
311:Fieldbus
306:Profibus
290:See also
104:Space(0)
27:Standard
1178:SLIMbus
1132:PC Card
1116:TOSLINK
806:Storage
760:RapidIO
640:FASTBUS
595:STD Bus
492:General
382:itu.int
256:EIA-449
248:EIA-530
142:RS-232C
96:Mark(1)
88:Voltage
1111:S/PDIF
1002:1-Wire
967:RS-485
962:RS-423
957:RS-422
952:RS-232
813:ST-506
770:NVLink
620:STEbus
580:Unibus
363:
301:RS-485
237:RS-232
232:RS-422
170:&
164:RS-232
149:RS-422
130:RS-423
1106:McASP
1074:Audio
1019:SMBus
1015:PMBus
997:UNI/O
937:HP-IL
890:SATAe
875:ESCON
848:HIPPI
680:NuBus
635:CAMAC
605:Q-Bus
600:SMBus
585:VAXBI
482:wired
387:3 May
260:DC-37
252:DB-25
22:RS423
1163:AMBA
1101:MADI
1086:AES3
947:MIDI
900:NVMe
896:AHCI
858:SCSI
843:DSSI
818:ESDI
695:SBus
655:EISA
590:MBus
480:for
473:and
389:2023
361:ISBN
270:The
196:X.26
1167:AXI
1096:I²S
1050:USB
1035:D²B
1030:SPI
1025:I3C
1007:I²C
942:HIL
927:DCB
898:or
885:SSA
868:SAS
828:SMD
823:IPI
745:AGP
735:PXI
725:PCI
720:UPA
700:VLB
690:MCA
675:VPX
670:VXS
665:VXI
660:VME
645:LPC
615:ISA
280:DEC
206:or
172:DCE
168:DTE
1213::
1017:,
1013:,
380:.
278:.
174:.
1169:)
1165:(
1021:)
1009:(
463:e
456:t
449:v
391:.
345:.
258:(
250:(
158:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
