What is an Active Electrical Cable?

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Basic AI/Artificial Intelligence Network Coherent

For AI and HPC (High Performance Computing) networks, connectivity technologies that not only offer high speed but also meet a balance of power consumption, cost, and signal quality are crucial.

Active Electrical Cables are gaining attention as a new option for short-distance connections, and this article will introduce them.

We will also explain the differences between Active Electrical Cables and Active Copper Cables (ACC), which are often confused with Active Electrical Cables, as well as the conventional Direct Attach Cables (DAC) and Active Optical Cables (AOC), which are the mainstream for short-distance connections.

Active Electrical Cable (hereinafter referred to as AEC) is a product that assembles a high-speed signal module with a built-in Re-timer IC using copper wire. As shown in Figure 1, the AEC corrects the electrical signal at the transmitting and receiving ends of the module using the Re-timer IC.

Differences between AOC, AEC, ACC, and DAC

The four types of cables differ in whether or not they perform electrical signal correction and photoelectric conversion.

AEC and ACC are often confused, but AEC corrects the electrical signal at both the transmitting and receiving ends, while ACC corrects the electrical signal only at the receiving end using a Re-driver IC.

Figure 2 below shows an image of each cable.

Furthermore, the four types of cables generally differ in the presence or absence of electrical signal correction and photoelectric conversion. Note that a longer maximum length indicates better maintenance of high-speed signal quality.

Table 1. Differences in Cables

Cable types	price	Maximum length	power consumption	bending	others
AOC	💲💲💲*1	Several tens of meters *2	⚡⚡⚡*1	○	With monitor function
AEC	💲💲*1	5~10m *2	⚡⚡*1	△	low latency
ACC	💲*1	3~5m *2	⚡*1	△	low latency
DAC	💲*1	3~5m *2	⚡*1	△	low latency

*1 This is an image.
*2 Depends on the transmission rate.

Based on the above, AEC is attracting attention as a cable that offers an excellent balance of high speed, power consumption, cost, and signal quality.

Summary

Active Electrical Cable is gaining attention in AI and HPC networks as a cable that offers an excellent balance of high speed, power consumption, cost, and signal quality.
The following is our portfolio of high-speed signal cables from Coherent.
If you would like to request a quote or have any questions, please contact us using the information below.

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