Re: [ts-7000] TS7400 serial ports - 5V or 3.3V?

["Michael DeGroot" <>]

I wasn't sure about the outputs either, but I looked at the peripheral board and it uses a max32xx series chip.  My circuit is using a max3232.  I don't know what the elegant solution to translating from 3.3 to 5 would be, but the brute force method would loop a max32xx to a max2xx.

On Tue, Mar 18, 2008 at 6:52 AM, Doug Chapman <> wrote:

I just got my TS7400 today, (it was rush ordered because I just fried my 7250, very sad). I am rushing to get a robot ready for the Trinity College competition in a few weeks.

I was just about to pull out my MAX233 chip out of the drawer to hook up a TTL - RS232 converter. Before I do are these pins 5V tolerant or are they limited to 3.3V. I searched for posts and found some discussions but nothing authoritative. From the MAX233 spec sheet it appears this chip is 5V only.

I also plan on having the second serial port communicate with an other 5V serial device. If the 7400 is limited to 3.3v does anybody have a suggestion for a 3.3V - 5V serial translator?

thanks,

- Doug

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