{"id":70903,"date":"2022-04-28T09:46:20","date_gmt":"2022-04-28T09:46:20","guid":{"rendered":"https:\/\/www.dewetron.com\/news\/arinc-429-and-mil-std-1553\/"},"modified":"2026-09-20T02:31:27","modified_gmt":"2026-09-20T02:31:27","slug":"arinc-429-and-mil-std-1553","status":"publish","type":"post","link":"https:\/\/www.dewetron.com\/us\/news\/arinc-429-and-mil-std-1553\/","title":{"rendered":"What is ARINC 429 and MIL-STD-1553?"},"content":{"rendered":"
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Aerospace engineering has always been one of the most complex and versatile fields of engineering. Not only does it require sophisticated technology to get aircrafts or satellites into the air, but passenger safety is also of greatest importance. It is therefore not surprising that these industries have established their own standards – ARINC 429 and MIL-STD-1553<\/a>. If you want to learn more about these standards and their implementation at DEWETRON, you are at the right place.<\/p>\n\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n\n

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What is ARINC 429?<\/h2>\n
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In short, ARINC 429 is a bus standard for avionics systems. Avionics is a collective term for all electrotechnical systems in airplanes or space travel. Most commercial aircrafts (cargo or passenger airplanes) use ARINC 429, but there is also a light variant<\/em>, which private or sports aircrafts use.<\/p>\n

The main characteristic of ARINC 429 is its high reliability. One reason for this is the way in which information transmission takes place. While in conventional systems a bit is transmitted by defining two voltage levels (high and low), ARINC 429 defines three levels. Thus, it is possible for each bit to contain synchronization information. This is not possible in conventional systems, where there must always be a separate start and stop bit for synchronization.<\/p>\n

Another special feature of ARINC 429 is the definition of so-called labels. Labels specify the properties of individual components. For example, an aircraft may contain various systems such as altimeters, on-board computers, etc. Labels define basic properties of these devices and ensure a certain interchangeability of the components.<\/p>\n\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n\n

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What is MIL-STD-1553?<\/h2>\n
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Aerospace or military applications<\/a> less frequently use the ARINC 429 bus. Instead, MIL-STD-1553 has established itself as the bus standard, offering above all a higher transmission rate.<\/p>\n

Also the MIL-STD-1553 standard does not need a separate start and stop bit. There, one solves the synchronization problem in a different way than for ARINC 429. MIL-STD-1553 defines only two voltage levels, where each bit consists of an up and a down signal. The combination up-down represents the 0 and down-up the 1. The graphic below compares the decoding scheme of MIL-STD-1553 and ARINC 429.<\/p>\n

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Decoding of bits in ARINC 429 and MIL-STD-1553<\/em><\/p>\n

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Due to this special type of decoding, it is possible to increase the interference resistance even further. Therefore, one uses a galvanic isolation of the individual system components from the mains. This means that no current can flow between two circuits between which information is to be exchanged.<\/p>\n\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n\n

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OXYGEN’s avionics features<\/h2>\n
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OXYGEN is a software for data evaluation and analysis developed by DEWETRON. Starting with version 5.3 OXYGEN also supports the ARINC 429 standard<\/a> and offers a wide range of functions:<\/p>\n