List of electrical characteristics of single collision domain segment "slow speed" network buses:

NameMultidropMax nodesElectrical typeCable typeMax bitrate [kbit/s] Length at max bitrateMax length [m] Bitrate at max length
EIA-485 (UART based)Y256EIA-485Twisted pair1000 kbit/s 1330 m 64 kbit/s
SCSI-1/2Y8Open collectorRibbon cable20 000 kbit/s 3 m6 m 5 Mbit/s/ch
SCSI Ultra2Y16DifferentialRibbon cable with twisted pairs40 000 kbit/s 12 m
LIN[1]Y16Open collectoropen collector with pull-up to 12V car supply 19.2 kbit/s 40 m
SIOXY6219.2 kbit/s
I²CY127 or 1023Open collector5000 kbit/s 7.6 m
SMBusY128Open collector100 kbit/s
PMBusY128Open collector400 kbit/s
10BASE5Y100Single endedRG-8X coaxial10 000 kbit/s 500 m500 m
10BASE2Y30Single endedRG-58 coaxial10 000 kbit/s 185 m185 m
CANY128ISO 11898-2 DifferentialTwisted pair1000 kbit/s 40 m1000 m[2] 50 kbit/s
DMX512-AN32EIA-485Twisted pair 120 Ω[3]250 kbit/s 548 m548 m (1800ft.)[4] 250 kbit/s
DCCY127Single ended 5 kbit/s
RS-232N2Single ended128 kbit/s 1.5 m (approx)15 m 19.6 kbit/s
PSI5YTwisted pair189 kbit/s 12 m (approx)
1-WireY248Open collectorSingle conductor, with ground16.3 kbit/s 300 m
X10Y256Power line0.05 kbit/s / 0.06 kbit/s
FlexRayTwisted pair20 000 kbit/s
SENT[5]N 2 Single endedSingle conductor, with 5 V power supply and groundasync. transmission,

min. 39.216 kbits/s

5 m
SPC[6] Y 5 Single ended or

Open collector

Single conductor, with 5 V power supply and ground, shielded when using higher speeds sync. and async. transmission,

variable up to ~150 kbit/s

~0.5 m 5 m same as SENT
I3CY12712 500 kbits/s
SPIYvariable up to ~10000 kbit/s

(depends strongly on physical setup)

The number of nodes can be limited by either number of available addresses or bus capacitance. None of the above use any analog domain modulation techniques like MLT-3 encoding, PAM-5 etc.

PSI5 designed with automation applications in mind is a bit unusual in that it uses Manchester code.

See also

References

  1. "LIN Standards (older versions are free to download, newer to be bought on ISO web site)". www.lin-cia.org. Retrieved 2019-07-31.
  2. "Microcontroller Interfaces, Part 3". 090114 ucpros.com
  3. "Ujjal's DMX512 Pages....DMX512 Physical properties". 090610 dmx512-online.com
  4. "DMX Wiring and Practice Quick Reference".
  5. http://www.diva-portal.org/smash/get/diva2:1162587/FULLTEXT02 "Implementing and Analyzing SingleEdge Nibble Transmission (SENT)Protocol for Automotive Applications", Master thesis of Naseem Ullah, 2014
  6. Strasser, Michael; Rasbornig, Friedrich; Platzdasch, Hagen; Gastinger, Ferdinand; Eggiman, Christoph; Beaurenaut, Laurent (2009-04-20). "Single-Edge Nibble Transmission: Challenges and Evolutions". SAE Technical Paper Series. Vol. 1. Warrendale, PA. doi:10.4271/2009-01-0125.{{cite book}}: CS1 maint: location missing publisher (link)
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