USB to RS232 chips

[mister_e]

check out the latest Microchip solutions, they have something similar if not better. MCP2200

[dhouston]

FTDI has been doing this for years and most Operating Systems support it. It's even built-in to the Linux kernel.

I've used FTDI http://www.ftdichip.com/FTDrivers.htm and Silicon Labs chips http://www.silabs.com/Pages/default.aspx but it really depends on your aims. If you want to build it into a product for distribution, I would go with FTDI because of the wide support. If you're only interested in one-off for your own use, I would just use this...

• http://www.byterunner.com/byterunner...ct_match=exact

[cncmachineguy]

Thanks guys. The FTDI seems like the most cost effective solution. No externals, Great driver support. I am not sure, will I still need a max chip or will this replace it?

[pedja089]

MCP2200 only support 8N1, so be careful...
I'm using PL2303.
You need MAX232 or similar level converter.

[dhouston]

I am not sure, will I still need a max chip or will this replace it?

I assume you want to interface with a PIC via serial and to a PC via USB. I cannot think of any situation where you need a MAX232. FTDI usually gives you numerous schematics covering several scenarios. They should answer any further questions for you. The datasheet says (p1)

• Integrated +3.3V level converter for USB I/O.
  Integrated level converter on UART and CBUS for interfacing to between +1.8V and +5V logic.

The PL2303 http://www.prolific.com.tw/eng/Products.asp?ID=59 recommended by pedja089 is probably a viable choice as well. I've never used it at the chip level so did not include it but a Prolific chip (probably the PL2303) is used in the dongle type adapter I referenced. I have used it under Windows, Linux & OSX.

[cncmachineguy]

Thanks Dave, Somehow I saw -1.8 instead of +1.8. Hmmm must get eyes checked.

Ok, Thanks for all the help guys, still not sure which way I want to go but at least I know more now.