FTDI FTAM. Explore Integrated Circuits (ICs) on Octopart: the fastest source for datasheets, pricing, specs and availability. FTR USB UART I.C. Datasheet Version © Future Technology Devices International Ltd. Page 2. •. Single chip USB to asynchronous serial data. quantity stored: FTAM. U-UART – USB UltraBaud Data Transfer IC with RS / RS and CPU I/F Options. Here you find a datasheet:

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UART Question

One of the things the RS standard specifies is the high signal voltages and semi-low load impedances; but since some people have not needed the extra noise immunity the high voltages can bring under certain conditions, they have gone without the line drivers and receivers. FTDI Chip unveils engineering community. Can I just throw a zener on the inverter input?

My understanding is that the signals need to be inverted between the UART and the connector. Yeah the MC would have worked if it routed, but the boards are already made. Oznog Active Member Dec 15, You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum.


Tried to use old, but compatible, atmega88 chips for it. I have read a present thation from Microchip that says it is essential, but is that really true?

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Tue Dec 31, 5: The old pin single-supply MC quad line receiver apparently meets that requirement. Boards have been in for a while. Let me restate the problem.

Going to order another one and see. Cheated and added some SOT23 inverters to the bottom. I don’t know about that. Started by fastline Vatasheet at 8: I’ll update once they arrive.

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Post pics when you get the boards in. Google [Bot] and 0 guests. I looked for devices with the same footprint and proper tolerances, but I found nothing. The and line drivers are current production as 14C88 and 14C I’m guessing it’s shot since removing the chip returns everything to normal.


Fri Nov 08, 7: The version of the Jburn2 GUI I have is incapable of properly reading and therefore verifying any chips.

Why not just use the UBW I posted the link to in post 3? To clarify I’ve added the schematic of the serial circuit.

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I want to connect this to a device similar to this So the idea is to have TTL level serial, but make the board RS level tolerant.

How do I get the RS signals within this tolerance? Somehow I missed this the first time around. For a better experience, please enable JavaScript in your browser before proceeding.

But the brilliance is that error won’t matter. That doesn’t really answer my question.