MR4xVx FeRAM Series ROHM Semiconductor MR4xVx FeRAM Series are Ferro-electric Random Access Memory from 32kbit to 2Mbit configuration developed by ferroelectrics process and CMOS process technology. These MR4xVx FeRAM series offer no backup by battery, high-speed random read/write, rewrite up to 1 trillion times, and low power consumption for various applications. The FeRAM ensures high quality and uninterrupted supply within the ROHM group. Typical applications include car navigation, audio, electronics, PLC, industrial printers, and TV for business.