2 Mbit FRAM with 40 MHz SPI — instant-on non-volatility
The Cypress FM25V20A-GTR is a 2 Mbit ferroelectric RAM (FRAM) in an 8-SOIC package, organized as 256K x 8 bits. It uses an SPI interface clocked up to 40 MHz and operates from 2 V to 3.6 V across the industrial temperature range of -40°C to 85°C.
What the 40 MHz SPI and 2 Mbit density mean for the BOM
The 40 MHz SPI clock reads or writes the 2 Mbit array at bus speed with no page-write wait states. The 256K x 8 organization holds roughly 256 KB of firmware parameters or telemetry.