TSN for avionics systems with Data Device Corporation (DDC)
More data, predictable latency, and less cabling are now priorities for many avionics programs. Time-Sensitive Networking (TSN) addresses these needs over standard Ethernet. In this TechNews, we briefly introduce TSN, explain who should evaluate it and why, and present DDC's network switch and end-system approach.
The family of standards that adds time awareness to Ethernet
TSN is a family of IEEE 802.1 standards that adds real-time communication mechanisms to Ethernet. Conventional Ethernet moves data as quickly as possible, but message delivery time can vary as network load changes. In a TSN design, network devices can be synchronized to a common time base, scheduled time windows can be reserved for critical traffic, and selected redundancy mechanisms can carry the same data over alternate paths.
By analogy, TSN adds traffic signals and reserved lanes to Ethernet. Scheduled transmission windows can be allocated to critical control data while video, recording, maintenance, and other traffic share the same physical network. In a properly engineered network, this can bound latency, control different traffic classes, and support high-availability objectives.
A key milestone for aviation was the publication of the IEEE 802.1DP-2025 / SAE AS6675 profile on November 7, 2025. The profile provides a common TSN design and interoperability framework for bridged Ethernet networks aboard aerospace platforms. Publication of the standard does not, by itself, establish the suitability or certification of any product, network, or platform; the applicable profile and conformance scope must be verified for each program.
Where existing data buses reach their limits
The clearest need arises in systems approaching their bandwidth limits. High-resolution radars, multi-sensor imaging systems, and high-volume mission data can exceed the capacity of a 1 Mbit/s MIL-STD-1553 bus. In closed-loop control and sensor-to-actuator communications, however, speed alone is not enough; latency must also be predictable and remain within its allocated budget.
A second major consideration is sensor fusion under size, weight, and power (SWaP) constraints. A common network engineered with time synchronization and redundancy mechanisms can make it easier to share sensor data across the platform while helping reduce duplicate interfaces and cabling. DDC identifies vehicle management and flight control, radar and situational awareness, integrated mission systems, ground vehicles, and commercial aviation among the potential applications.
Teams that recognize any of these challenges—“I cannot carry this data over the existing bus,” “I need precise synchronization across my sensors,” “I want to manage critical and routine traffic over a common backbone,” or “my cabling and weight budgets are tightening”—should include TSN among the architectures they evaluate.
More data, predictable latency, one network
MIL-STD-1553 and ARINC 429 continue to perform their intended roles on many platforms. However, the volume of data generated by new sensors, the need for precise timing, and network consolidation goals can extend beyond the limits for which these data buses were designed.
One of TSN's key advantages is that it is built on open IEEE standards and the widely adopted Ethernet ecosystem. This approach supports interoperability objectives, can support a phased transition from existing networks, and allows critical control data and routine maintenance traffic to be managed over one backbone. Depending on the program, the result may be less cabling, lower weight, and a simpler network architecture.
From network switches to end systems: the TSN solutions listed in DDC's catalog
DDC frames its TSN approach around aviation requirements for high reliability, availability, and deterministic communications. Its portfolio considers the network switch alongside the end-system interfaces that connect subsystems to the network. The availability and scope of any required DO-254/DO-178C design-assurance evidence, environmental qualification, and IEEE 802.1DP conformance must be confirmed for the selected model, configuration, and platform.
DDC's 2026 product catalog highlights the TSN-Matrix network switch and TSN-Access end-system interface. Each product's configuration, lifecycle status, environmental requirements, and certification scope must be confirmed with DDC for each program before a quotation is issued.
- TSN-Matrix · ET-71202 (Network switch)
- The TSN-Matrix is DDC's 16-port, 3U VPX TSN Ethernet switch. It supports IEEE 802.1AS-2020 time synchronization, IEEE 802.1Qbv traffic scheduling, IEEE 802.1Qci per-stream filtering and policing, and IEEE 802.1CB FRER; it offers multiple physical-layer options, including 1000BASE-X and 10GBASE-KR.
- TSN-Access · ET-71401 (End-system interface)
- TSN-Access is an FPGA IP core for TSN end systems. It provides a PCI Express Gen3 x4 host interface, autonomous built-in test, and redundant TSN Ethernet ports. DDC's catalog lists 1000BASE-KX and 10GBASE-KR options, an AMD Kintex UltraScale implementation, portability to other FPGAs, and drivers for Lynx MOSA.ic and Linux.
- Program-specific integration approach
- DDC's publicly available TSN approach addresses end-system and network-switch requirements from the chip level through board- and system-level solutions. Form factor, port configuration, TSN profile, software support, and certification objectives are defined together with the program requirements.
Since 1975 Over 50 years of industry experience Start your DDC TSN evaluation with a local technical team
We match your requirements to the appropriate DDC solution and work with DDC's technical team to clarify port configuration, traffic classes, latency budgets, redundancy, and environmental conditions. Our team in Türkiye coordinates product selection, technical discussions with DDC, and support throughout the quotation and procurement process.
