LiteSPEed Q&A: Bringing Ethernet to the Edge of Aerospace Systems
Defense and aerospace platforms are only getting more data-hungry, so the pressure is mounting for interconnects that are ever-smaller, lighter, and more efficient. Aptiv’s new LiteSPEed™ cable answers that call, taking ruggedized single-pair Ethernet (SPE) out into the field without sacrificing performance.
In this Q&A, our Sr. Product Manager, Lynden Bajus, goes over LiteSPEed’s many benefits, such as smaller form factor, SWaP-C savings, and dual-channel power and high-speed data transmission over a single cable.
Why is LiteSPEed’s single-pair Ethernet design such a game-changer?
LiteSPEed brings single-pair Ethernet to the harsh environments our customers operate in— aerospace, defense, and satellite platforms. Traditional Ethernet cables use four pairs of wire, while SPE uses just one. We’ve achieved that reduction without giving up data integrity or environmental performance.
That’s the breakthrough: full Ethernet capability in a fraction of the package. SPE doesn’t replace any part of the existing ecosystem—it extends Ethernet’s reach, enabling connectivity all the way to the edge.
How does a smaller, lighter cable impact overall payload?
In space and aerospace applications, every gram and every cubic millimeter is a negotiation. When your cable harness is up to 25% lighter and 50% smaller in cross-section, that’s real mass and volume you can reallocate—more sensors, more instrumentation, more mission capability.
It also simplifies routing through tight airframes, reducing installation time and minimizing the risk of damage during integration.
How does SWaP-C optimization translate into cost savings?
SWaP-C is all about the cascading effect. A lighter cable leads to a lighter harness, which can reduce the structural requirements to support it. That compounds into meaningful launch cost savings.
At the same time, smaller cables are faster to route and terminate, which reduces labor hours on the production floor. The savings aren’t isolated to the cable—they multiply across the entire system.
What engineering challenges had to be solved to achieve this performance in a smaller footprint?
Shielding and signal integrity are the biggest challenges, especially with a wider AWG range than traditional Ethernet. On top of that, we had to meet full aerospace environmental requirements—vibration, temperature extremes, and fluid resistance—all within a much smaller envelope.
Achieving that took significant iteration and engineering investment, but that’s exactly what our customers are relying on: performance without compromise.
The Power + Data Advantage
How does combining power and data in a single cable simplify system architecture?
Traditionally, you’re running two separate cable paths—one for power and one for data. LiteSPEed collapses those into a single cable, reducing connector count, routing complexity, and potential failure points.
For satellite and UAV platforms, where harness complexity can be a major integration challenge, that simplification is significant. One cable, two functions, fewer things to go wrong.
Why is the shift from legacy protocols like CANbus becoming necessary?
CANbus was designed for simpler systems with lower data rates. Today’s platforms are far more sensor-dense and data-driven, and those legacy protocols can’t keep up.
Single-pair Ethernet supports data rates from 10 Mb/s to 10 Gb/s over a single pair. The industry is converging on Ethernet as a unified standard that can operate across the entire system architecture.
How does single-pair Ethernet improve overall system reliability?
Fewer connectors and fewer cable runs are the obvious benefits, but there’s more to it. SPE was originally developed for reliability in industrial and automotive environments before being adopted in aerospace.
You also gain built-in diagnostics and network monitoring capabilities that legacy protocols don’t offer. So not only is the physical layer simpler, but engineers have better real-time visibility into system performance.
What is the learning curve for engineers adopting this technology?
Engineers who already understand Ethernet are most of the way there. The protocol itself is familiar—what’s new is the single-pair physical layer and connector interface.
Aptiv works closely with customers during the design phase to ensure smooth integration before production. The goal is simple: adopting LiteSPEed should feel like an upgrade, not a disruption.
Conclusion
LiteSPEed is more than a cable solution, it's a new way of thinking about system design. With Ethernet over single pair, engineers can design smaller, lighter, less complex and less expensive platforms that do more and perform better.
"Single pair Ethernet isn't meant to cannibalize what's already out there," says Lynden. "It's meant to push Ethernet further out into the field where the performance is required."