BR9040F-WE2 [ROHM]

Serial EEPROMs that can be connected directly to a serial port and electrically erased/written. Writing and reading is performed in word units using four operation commands. Communication occurs through CS, SK, DI, and DO pins. WC pin control initiates write-disabled state for use as one-time ROMs. Features include 1k/2k/4k bit densities, single power supply, serial data I/O, self-timed programming with auto-erase, low supply current, noise filter on SK pin, write protection by WC pin, space-saving packages (DIP8/SOP8/SSOP-B8/MSOP8), 100,000 erase/write cycles endurance, 10-year data retention, easy serial port connection, and 'FFFFh' pre-stored in all addresses.