USB-C and SuperSpeed: A Practical Introduction
USB-C is a connector, not a speed. CC roles, PD power, 85 ohm SuperSpeed pairs and the five mistakes that stop a port from working.
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From the desk
Market signals, technical notes, and practical sourcing guidance for semiconductor procurement.
USB-C is a connector, not a speed. CC roles, PD power, 85 ohm SuperSpeed pairs and the five mistakes that stop a port from working.
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Check pinout, flash page size and SRAM before moving a design from STM32F103RBT6 to the higher-density RCT6 or RET6 in the same LQFP64 footprint.
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The schematic sets efficiency; the layout sets temperature. Hot loop, input capacitor ripple, switch-node ringing, thermal vias, and the loss budget that decides the copper.
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A partial reel is cheaper per piece and riskier per failure. Tape anatomy, count tolerance, moisture history, and the five clauses that prevent most surprises.
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Work out whether a 7805 can power your board: check its pins, input headroom, realistic heat budget and the changes required for a buck replacement.
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A receiving routine that holds up in an audit: ISO 2859-1 sampling, AQL by part class, cheap-to-expensive test order, and records someone else can reproduce.
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At 480 Mb/s a bit is 2.08 ns. 90 ohm impedance, 50 mil skew, and a continuous return path decide whether the link keeps high speed...
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Choose LM317 resistor values, identify the output-connected tab, check minimum load and calculate a realistic heat budget before approving a replacement.
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