I am looking for a small USB to RS232 (or TTL serial) converter. FTDI was the first stop, but the smallest IC they have is in SSOP28 or QFN32. I'm looking to go even smaller. I don't need high speed - max probably 38400 baud, and USB Low Speed or Full Speed class. I can see how the pins are used up: some for data (TX, RX, CTS, RTS), USB pins (D+, D-, 5V), voltage regulator, crystal, etc.
I'm not sure what product category I should be looking for, other than FTDI's website, which I already checked. I suppose I could also use a USB micro (I already have two micros on the board), but this adds size and complexity to an already complex product. Does anyone know of any possible chips? (preferably also low component count, this is not critical but would be nice.)