Datasheet for IC 576002-3 two-wire differential transmitter

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Phrak
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I'm searching for a datasheet.

This IC device is a two-wire, differental, digital transmitter.
Each leg has three output states (hi, lo, gnd).
The otputs are differential and trapizoidal in shape.

The logo on the chip is a solid white triangle with the point upward. And a Google search has let me down.
 

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What package?

DIL, SM, how many pins?

What's it out of?
 
zeitghost said:
What package?

DIL, SM, how many pins?

What's it out of?

I'm not sure how the packaging matters, but there are two channels in a package.

The package is about a 28 pin surface mount, 50 mil centers.

It's used in aeronautic, system to system data transmission.
 
It's very possible this is a custom made IC for a specific application. There may be no specs available, except for engineers that designed the circuit.
 
what said:
It's very possible this is a custom made IC for a specific application. There may be no specs available, except for engineers that designed the circuit.

Thanks, Wadt. That could very well be--even as an IC that's been discontinued, to be replaced by a custom part. It seems to support a odd communication standard.