brew-your-own-unibus boards?

From: Davison, Lee <>
Date: Tue Jan 20 04:27:29 2004

> The receivers are a bit more interesting. The spec says that their
> threshold must be between 1.3 and 1.7 volts and that their high-level
> input current must be no greater than 80?A;

> Are there any bus receiver chips that have a reference-voltage pin,
> which could be connected to (say) 1.5V?

You can use open drain CMOS buffers/inverters in this way by setting
the supply volts to give the desired ViH point (check the data sheet
but ViH * 2 is about right). The outputs are at least TTL volts
tolerant used like this.


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Received on Tue Jan 20 2004 - 04:27:29 GMT

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