256Kbit FRAM with I²C — what it replaces and where it fits
The Cypress FM24V02A-GTR is a 256Kbit ferroelectric RAM (FRAM) in an 8-pin SOIC, organized as 32K x 8 bits. It uses the I²C bus at up to 3.4 MHz, with a 130 ns access time and non-volatile storage that retains data without a battery. This is the tape-and-reel ordering code for automated assembly lines.
Why the 3.4 MHz I²C bus and 130 ns access matter
The 3.4 MHz I²C clock is the high-speed mode (Hs-mode) capable of pushing 256Kbit of data in under 10 ms per page. The 130 ns access time means the first byte appears on the bus within a single cycle after the address is clocked in — useful for real-time data logging where the MCU cannot stall. Combined with the 2V minimum supply, this part works in battery-backed instrumentation that needs fast, frequent writes without wear-out.
The base product number FM24V02 covers both the tube (FM24V02A-G) and tape-and-reel (FM24V02A-GTR) variants — order the exact suffix that matches your pick-and-place feeder.
Package and supply — what the board sees
Surface-mount 8-SOIC with 3.90 mm body width, standard footprint for SOIC-8. The 2V to 3.6V supply means a single 3.3V rail is fine, and the part will hold data down to 2V — useful for brownout retention. No external charge pump or battery is needed; FRAM writes at bus speed without the page-erase overhead of EEPROM.