The ARINC 629 computer bus was introduced in May 1995 and is used on the Boeing 777, and Airbus aircraft. The ARINC 629 bus operates as a multiple-source, multiple-sink system; each terminal can transmit data to, and receive data from, every other terminal on the data bus. This allows much more freedom in the exchange of data between units in the avionics system. ARINC 629 has the ability to accommodate up to a total of 128 terminals on a data bus and supports a data rate of 2 Mbit/s.

The ARINC 629 data bus was developed by the Airlines Electronic Engineering Committee (AEEC) to replace the ARINC 429 bus. The ARINC 629 data bus was based on the Boeing DATAC bus.[1]

While some people expected that the Boeing 777 would be the first and last aircraft to use ARINC 629 databus,[2] the ARINC 629 databus is also used on the Boeing 737 MAX and Airbus A330 and A340.[3]


  1. Cary Spitzer. "The Avionics Handbook". Daniel A. Martinec. "Chapter 2: ARINC".
  2. John Keller. "The coming revolution in commercial avionics data networking".
  3. "ARINC 629 Data Bus Standard on Aircrafts" [sic]. p. 193.
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