IEEE 1394
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IEEE 1394 is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer. It was developed in the late 1980s and early 1990s by Apple in cooperation with a number of companies, primarily Sony and... Wikipedia
Max length: 4.5m.
Bitrate: 1394a, half-duplex 100–400 Mbit/s (12.5–50 MB/s); 1394b and later, full-duplex 800–3200 Mbit/s (100–400 MB/s)
Daisy chain: Yes, up to 63 devices
Max. current: 1.5 A
Max. voltage: 30 V
Pins: 4, 6, 9
Produced: 1994–current