I have a copy of the NEC, but I know that I NEVER find the answer there.
RCM, on the other hand, is sure to have it.

Can I run a 240v receptacle and a 120v one off the same breaker? Sized
appropriately, of course. Say a 2-pole 20A breaker, 3-wire 12ga cable,
and 20A receptacles, like this:

P1 ________________
|___
N ........... 240v receptacle
. ____
P2 ________________|
| .
| ........
|__________ 120v receptacle


It looks OK to me, but one never knows what esoteric considerations the
NEC might make.

Thanks,
Bob