M58WRxxxKT/B - 32Mb - 64Mb, 1.8V, x16 Multi Bank B.
Micron
M58WR064KT - 64Mb Multi Bank Burst Flash memories
M58WRxxxKT/B - 32Mb - 64Mb, 1.8V, x16 Multi Bank Burst, Flash Features M58WRxxxKT/B - 32Mb & 64Mb, 1.8V, x16 Multi Bank Burst, Flash M58WR032KT, M58WR.