See the  ft8U232 - USB Uart  at http://www.ftdi.co.uk/ft232r08.pdf

Harold


On Tue, 3 Jul 2001 11:36:20 +1200 Shane Tolmie <shane@KEYGHOST.COM>
writes:
> I wish to make a USB -> RS232 TTL serial adaptor.  It plugs into the
> USB port, and provides 4 wires out - +5V, GND, and TX/RX at
> 0V/5V TTL levels.  All I'm interested in is the hardware.
>
> The hardware will look very simple - a USB plug on one end, and a
> 4-pin plug on the other.
>
> In your experience, could you recommended an appropriate USB <->
> serial chip?  Maybe something off the shelf?  The main thing is, it
> needs TTL RS232 out, and a +5V power supply as well, to power the
> target circuit.  90mA maximum load.  I dont mind programming in
> C++ to interface to it.
>
> I dont need a PIC16C765 - I wish to interface to a smaller product
> that uses a PIC12C672, via a PC computer, without having the
> adaptor built into the target circuit.
>
> Regards,
> Shane.
>
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