The Macronix MX25L6433FMI-08G is a 64 Mb (x1/x2/x4) 3 V 133 MHz CMOS MXSMIO Flash Memory in SOP-16 package. It is a member of the MX25L6433F series featuring a maximum clock frequency of 133 MHz, a maximum read speed of 104 MHz, and a maximum write speed of 104 MHz. The memory features 8 kB sectors, 64 kB blocks, 2048 kB parameter blocks, and a total of 32768 kB addressable Flash memory. It operates on a single 3 V power supply and has a read Retention Voltage (Vret) of 2.3V. It has byte, dual-byte, quad-byte, and sector erase command sets, and can be programmed with 1-byte, 2-byte, or 4-byte commands. Its advanced security features include a 64-bit one-time Programmable Key Lock Register, a one-time Programmable Block Lock Register, and an Embedded Program Verification feature to protect code and data.