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CAN Bus And SAE J1939 Bus Voltage - Copperhill
The USB 3.0 physical layer
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RS-232 - Wikipedia
Guide to USB-C Pinout and Features - Technical Articles
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Switching in USB Consumer Applications | アナログ・デバイセズ
Pull-up and pull-down in USB differential line and logic levels - Electrical Engineering Stack Exchange
USB Power Delivery: Convenience and Safety | Renesas
What inputs can I use with my Raspberry Pi? Part 1 - Switches and logic- level sensors
What is the exact voltage of a standard USB data signal in either data wire? I'd assume they are the same. I know that the power wires are 5 volts. - Quora
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logic level shifter - General Electronics - Arduino Forum
Can I Use 3.3V TTL to Trigger a 3.3V CMOS Device? - National Instruments
USBee QX 2.0 Mixed Signal Oscilloscope, Logic Analyzer, Signal Generator, Protocol Decoder and Analyzer
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USB (Communications) - Wikipedia
How does USB superspeed electrical signaling work? - Electrical Engineering Stack Exchange
