+3.3V CMOS <=> unbalanced AES3 driver / receiver is needed.

[VSN]

Hello!

Please suggest cheap and simple:
1). Line driver solution to convert +3.3V CMOS signal into an unbalanced AES3 signal to drive 75 Ohm coax cable
2). Line receiver solution to convert unbalanced AES3 signal from 75 Ohm coax cable into a +3.3V CMOS signal.

 

[peufeu]

> Line driver solution to convert +3.3V CMOS signal into
> an unbalanced AES3 signal to drive 75 Ohm coax cable

A resistor. If you're feeling particularly generous you can add a 74HC gate.

> Line receiver solution to convert unbalanced AES3 signal from 75 Ohm
> coax cable into a +3.3V CMOS signal.

None, since SPDIF receivers usually do not need external receivers.

BTW, if you control both ends, why the hell would you use an unbalanced connection ?

 

[VSN]

> Line driver solution to convert +3.3V CMOS signal into
> an unbalanced AES3 signal to drive 75 Ohm coax cable

A resistor. If you're feeling particularly generous you can add a 74HC gate.

Will it be OK to drive 75 Ohm coax cable about 1000 meters long?

> Line receiver solution to convert unbalanced AES3 signal from 75 Ohm coax cable into a +3.3V CMOS signal.

None, since SPDIF receivers usually do not need external receivers.
/QUOTE]
In my case I dont yet have any receiver - just +3.3V LVCMOS input of a FPGA.
With direct connection it will not detect unbalanced AES3.

BTW, if you control both ends, why the hell would you use an unbalanced connection ?

The reasons are:
1). I dont control both ends, the solution I am asking for must work with any equipment.
2). Unbalanced AES3 can drive 1000 meters of 75 Ohm coax cable, while balanced AES3 can drive much shorter length ( ~ 100 m ) of more expensive cable ( STP ).

I already have a solution for balanced AES3: Differential CMOS Line Driver and Receiver Pair DS89C21 from TI.
It is based on RS-422, so there is nothing to invent.
Please advise if I could use DS89C21 also for unbalanced AES3?