3 ms·
> Cables should be dumb pipes, not devices with their own active circuitry. You only need the active circuitry for high-power (240W) or high-speed (Thunderbolt
by duskwuff 1y ago
> Cables should be dumb pipes, not devices with their own active circuitry.
You only need the active circuitry for high-power (240W) or high-speed (Thunderbolt) cables. Ordinary cables just need a single, cheap resistor.
- lxgr 1y agoC-to-C cables never have a resistor for identification; those are for devices or legacy cables/adapters to USB-A/B. “Active” is also somewhat ambiguous: E-marked cables can be both passive or active in terms of what they do with the signal on the high speed data lines (such as amplifying it, converting it to optical etc.)