meh, want to redesign my usb-cereal to be fully SMT-able, so i can get a decent sized batch and actually use them (also with mating footprint on other boards for flashing)
Current design has a CP2104 which is a 'better' serial chip, but rather expensive compared with CH340c; (0.2616 × 50) + 2.47 = 15.55 and
CP2104 is 0.9128 × 50 = 45.64
but maybe I just need smaller scale, go to 10 or so (CP2104 still about twice as expensive)..