Toshiba today announced a new generation of their 19nm NAND. The company already produces 19 nm NAND that is currently used in SSDs from Corsair, Plextor and Sandisk. Toshiba is best know for Toggle NAND which was developed as an asynchronous double data rate NAND without a separate clock signal to make it consume less power.
The previous 19nm was available in both Single Level Cell (SLC) and Multi Level Cell (MLC) NAND. The now announced second generation appears to be only available as 2 bits per cell (MLC-2) and 3 bits per cell (MLC-3).The company’s 3 bits per cell MLC NAND will first only be available for use in smartphones and tablets but should also become available to be integrated in SSDs.
In order to integrate this kind of NAND into SSDs it’s required to develop a SSD controller that can deal with it. The company also announced that the new 64 gigabit 2 bit MLC NAND chips are 94 square millimeter and can achieve a write speed of up to 25 MB/s. Toshiba claims that this means they are the world’s fastest class in 2 bit per cell chips.