I-PEX 83065-100B-01-D CABLINE®-VS 40AWG/50Ω series ultra-thin coaxial cable replacement

Why is it more critical to pay attention to high-speed signal transmission when the cable length increases?

In high-speed display, industrial cameras, AI vision, and high-performance computing equipment, extremely fine coaxial cables not only serve the purpose of signal connection but also have a direct impact on the signal integrity of the entire high-speed link. Generally speaking, as the cable length increases, the insertion loss, propagation delay, and reflection effects caused by impedance discontinuity become more pronounced during signal transmission. High-frequency components are also more susceptible to attenuation, thus it cannot be simply assumed that "as long as the connector can be plugged in and conduct normally, it can be used." The I-PEX CABLINE®-VS series uses a 0.5mm pitch, horizontal insertion structure, and mechanical lock, with the official reference transmission performance being 32Gbps/lane NRZ; the reference test uses a 40Pin, AWG#40 Micro-Coaxial Cable, 45Ω, and 100mm cable length. This also indicates that in high-speed applications, cable specifications, impedance, and length need to be evaluated as a complete signal chain.

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For example, in 83065-100B-01-D: What does a 200mm length mean?

The I-PEX 83065-100B-01-D introduced this time is a CABLINE®-VS 50P 1-1 ultra-fine coaxial cable assembly, using 50 AWG#40, 50Ω Micro-Coaxial Cables. The drawings specify the finished product total length as 200.0±5.0mm, with a 1-1 straight-through Pin Assignment at both ends. The cable end connector uses the 20454-250T series, and the complete model corresponding to the formal drawings BOM is 20454-250T-01. To engineers, 200mm does not necessarily mean there is a signal problem, but it means that SI validation needs to be carried out in conjunction with the actual protocol, working frequency, receiver tolerance, and PCB routing; especially when the project length increases from 100mm to 200mm or even 300mm, the short cable test results cannot be directly applied. The I-PEX official also lists the 100mm, 200mm, and 300mm of CABLINE®-VS 50P 1-1 separately as 83064-100B-01-D, 83065-100B-01-D, and 83066-100B-01-D, which exactly reflects that length is an important variable in the selection of ultra-fine coaxial cable assemblies.

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After lengthening, what are the main effects on high-speed signals?

From the perspective of engineering design, the most critical factors to consider when the length of extremely thin coaxial cable bundles increases are insertion loss, return loss, propagation delay, and signal edge quality. As the cable lengthens, the transmission path becomes longer, and the energy attenuation of high-frequency signals usually becomes more pronounced; if there are impedance discontinuities in connectors, cables, or termination areas, reflections may also occur, further reducing the eye diagram margin at the receiving end. At the same time, an increase in length also brings greater propagation delay, and for high-speed differential links, factors such as delay, amplitude attenuation, and crosstalk need to be comprehensively evaluated. Therefore, when replacing or customizing extremely thin coaxial cable bundles, it cannot be simply copied according to AWG#40; consistency should also be maintained in terms of wire material impedance, structure, length, Pin definition, and connector assembly processes. The official information of CABLINE®-VS indicates that this series supports AWG36～AWG44 Micro-Coaxial Cable and provides specifications such as 20, 30, 40, and 50 Pins; among them, the 83065 corresponds to 50 Pins, AWG#40, 200mm, and 1-1 scheme.

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Selection and compatibility with alternative solutions reference and recommendations

For engineers and purchasing personnel, when selecting or replacing ultra-fine coaxial cable assemblies, it is recommended to prioritize confirming several core parameters, including "connector + pin count + AWG + impedance + length + wire sequence." Taking I-PEX 83065-100B-01-D as an example, its key configuration is 50Pin CABLINE®-VS, 0.5mm Pitch, AWG#40, 50Ω, 200mm, 1-1 straight-through, with the cable end connector being the 20454-250T series, and the formal BOM model being 20454-250T-01. If the actual equipment requires replacing a 100mm cable assembly with a 200mm one, or further extending it to 300mm, then the high-speed signal integrity should be re-evaluated, rather than simply confirming that the mechanical dimensions are consistent. For purchasing personnel, it should be avoided to quote solely based on "50Pin AWG#40 ultra-fine coaxial cable." It is necessary to confirm the complete material number, connector model, cable length, impedance, and pin assignment. Our company can provide: I-PEX 83065-100B-01-D compatible alternative cable assembly solutions, which can be matched according to the customer's equipment's connector, AWG, length, pin count, wire sequence, and assembly requirements, providing an ultra-fine coaxial cable assembly solution for engineering verification, domestic substitution, and bulk purchasing.

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Length change is not a simple dimension change, but a high-speed link change.
The influence of the increased length of extremely fine coaxial cables on high-speed signals is mainly reflected in aspects such as loss, reflection, delay, and signal integrity margin. Therefore, in high-speed signal applications, as the cable length increases, it is more necessary to confirm whether it meets the target rate through actual SI testing, rather than simply judging whether it is qualified based on the pass/fail of the conduction test. I am【3W Electronic Components Network】We have mature production and engineering R&D experience in the field of ultra-fine coaxial cable束, and can assist in model matching and structural substitution. For inquiries, please contact:Manager Zhang 18913228573 (WeChat same number)The I-PEX 83065-100B-01-D uses a 50Pin CABLINE®-VS connection scheme, AWG#40 50Ω Micro-Coaxial Cable, with a length of 200±5mm, a straight-through 1-1 configuration, and wire ends using the 20454-250T series connectors, which is a typical high-speed ultra-fine coaxial cable solution. For engineers, the focus is to ensure the impedance and signal integrity of the entire chain; for buyers, the key is to ensure that the substitute products truly match the key specifications such as connectors, AWG, impedance, length, and wire order.