47L64-I/SN [Microchip]

The 47L64 is a serial EERAM with an SRAM memory core and hidden EEPROM backup. It operates as a full symmetrical read/write SRAM with automatic backup to EEPROM on power disruption, effectively making it an SRAM that never loses data. The device is organized as 8,192 x 8 bits using an I2C serial interface. It features unlimited reads and writes, zero cycle delay, and invisible-to-user data transfers for backup and restore operations. The device requires a small external capacitor (typically 22µF) for proper operation during backup events.