We are often asked the difference between Macronix part numbers MX25UM51245GXDI00 and MX25UM51245GXDI00-TR. The only difference between these two parts is the packaging with MX25UM51245GXDI00 being packaged in trays and MX25UM51245GXDI00-TR packaged on a tape and reel. Electrically speaking they are the same part.