Voltage protection for 12MHz data line

[Jim]

"Fred Bloggs" <nospam@nospam.com> wrote in message
news:4057240F.7060001@nospam.com...

John Woodgate wrote:


Can you not capacitively-couple it to wherever you might get a higher
voltage from? This is much simpler than arranging low-cost over-voltage
protection for a high-speed line at 3.3 V.

I'm not going to even grace that pretentious troll with a reply, but
he's talking about a simple S/PDIF digital audio channel IEC958 where
some CD's and other garbage producing devices have contorted the signal
level from the standard 0.5Vpp ac-signal at 75 ohm bi-phase coding at
6MHz maximum to std TTL with at most TTL buffered drive. A suitably
protected receiver that may receive both is:

snip

I guess you are talking about me? No worries mate. Thanks for the circuit
though.

Jim