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lm2674 ROHS issue

hi, 

I used LM2674M-3.3/NOPB in my system. As I know LM2674M-3.3 is not available from TI's website. But from the open market(such as Avnet) it's still available.  I got some sample,it marked as MCAB 2674M3.3.  How can I distinguish whether it's  compliance with ROHS or not? And what's the data code(MCAB) meaning? If this component is not compliance with ROHS, I need to rework all my boards. Thanks!