I believe the voltage would hold around 4.9, I just realized another component I have came with a USB->TTL (using PL1303 chip), and it works just fine for serial communications, of course the DTR is not exposed on it though. I really want to get this FT232RL working! I have emailed gravitech whom I bought it from twice in 2 weeks and no response from them. I tried uploading a default setting with mprog but it is setup for FT232BM, and not the RL so it will not upload.