256Kbit FRAM with parallel interface — what it is and where it fits
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. This makes it a direct fit for applications that log data, store calibration constants, or hold configuration parameters in industrial control, metering, and instrumentation equipment where the system must retain state across power cycles without a backup cell.
Package and footprint
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.