SN74AVC4T774: How to find damping resistance

Tomoyuki Taguchi

Part Number: SN74AVC4T774

SN74AVC4T774 is adopted, but it is used as HDMI output.

Please tell me how to find the output impedance when outputting from the B port.

Wiring resistance is 50Ω.

+1 Clemens Ladisch over 2 years ago

Guru 316690 points

Divide V_OL by I_OL. The typical value is roughly half that of the maximum value.

(HDMI uses Current-Mode Logic; I do not understand how you can use a plain logic device like the SN74AVC4T774 for that.)

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