Series One Watt Zeners 64 Mbit, Low Voltage, Serial Flash memory With 50MHz SPI Bus Interface 4 Mbit (256Kb x16) UV EPROM and OTP EPROM 8 Mbit 1Mb x8 Low Voltage UV EPROM and OTP EPROM 64 Mbit (4Mbx16, Boot Block) 3V Supply Flash memory 4 Mbit (512Kb x8 or 256Kb x16, Boot Block) single supply Flash memory 5V or 3V NVRAM Supervisor for Up to 8 LPSRAMs Serial access Real-Time Clock with alarm