Comments (3)
Yes, it is a 5V part. VCC range is 4.75 to 5.25V so the 5V supply is completely correct. The minimum input voltage for logic high is 2V so there is no problem feeding the TX from teensy into this part at 3.3V.
In the RX direction, there is a voltage divider (R68, R69) so that the maximum voltage seen at the teensy is ~3.1V, again this is well above the minimum logic high level of the teensy and there is no 5V logic at the teensy pins.
No discrete translator is required.
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I do not know how did I fail to notice this voltage divider, but in that case wouldn't that affect the rise time of the signal, I am wondering what is the max safe baud rate in that case?
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No issues with 115200 if the vfd supports it.
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Related Issues (2)
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