The FM25640B-G is a 64-Kbit (8K × 8) serial F-RAM with an industry-standard SPI interface, operating from 4.5 V to 5.5 V and –40°C to +85°C. It delivers 100 trillion read/write endurance, 151-year data retention at 65°C, and NoDelay™ writes at up to 20 MHz. Advanced hardware and software write protection, low active and standby currents, and an 8-pin SOIC package make it ideal for data logging, industrial control, and frequent nonvolatile writes.