The Infineon FM28V020-SG is a 256Kbit non-volatile FRAM memory organized as 32K x 8 bits, accessed through a standard parallel interface. It combines the write speed of SRAM — 140 ns write cycle time, word or page — with the retention of a non-volatile technology that requires no battery backup.
Housed in a 28-SOIC wide-body package with a 7.50 mm body width, the FM28V020-SG shares the same JEDEC footprint as many legacy parallel SRAMs and EEPROMs. If you are replacing a battery-backed SRAM or an older parallel EEPROM in a 28-SOIC socket, verify the pinout against your existing part — the FRAM pin assignment follows the industry-standard 28-pin parallel memory map, but a quick cross-check saves a board spin.