Cchen.1AssociateForum|Forum|4 years agoJune 10, 2022QuestionLM2903YST -Is that abnormal that COO CN has bottom mark while COO PH without bottom markForum|Forum|4 years agoJune 10, 20220 replies825 viewsLM2903YST -Is that abnormal that COO CN has bottom mark while COO PH without bottom mark.Operational amplifiers