In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

Your right Paul, the data sheet says 2.7V.
That's what is guaranteed to work under all speeds and environmental conditions.

My experience has been that 2.5V works fine, and 2.5V regulators are readily available.
In fact, I was running a test last night and as of this morning an SX28 was running on 2.2V and still sourcing enough current to light a couple of LEDs.

The advantage of this is that for battery operated devices that use LEDs  you can minimize the power lost by heating resistors if Vdd is close to Vf.

If your application is being used in outer space or for life-sustaining medical equipment you would probably want to keep it in spec though.  :smile:

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