PSEUDO SLC (pSLC)

Enhancing Performance and Endurance in 3D TLC NAND

The flash storage industry is characterized by relentless innovation, constantly pushing the boundaries of performance and capabilities for various applications. One of the latest innovations in this field is 3D TLC NAND flash, known for its impressive storage density and capacities, rivaling traditional hard disk drives (HDDs).

While 3D TLC NAND offers exceptional storage capabilities, it’s essential to consider specific use cases where newer doesn’t always mean better. Its predecessor, SLC NAND, stands out for its superior performance and durability, albeit at a higher cost and lower storage density.

Pseudo Single-Level Cell (pSLC) technology, available in Exascend flash storage devices, bridges the gap between these two NAND flash types. It combines the cutting-edge advantages of 3D TLC NAND with the blazing-fast performance and endurance associated with SLC NAND. As a result, pSLC offers:

Enhanced Durability: pSLC inherits the robust endurance of SLC NAND, ensuring data integrity and reliability, making it ideal for demanding applications.
Higher Performance: With pSLC, you get the speed and responsiveness of SLC NAND, making it suitable for tasks that require rapid data access and processing.
Balanced Cost-Effectiveness: While pSLC may be more expensive upfront than 3D TLC NAND, its extended lifespan and superior performance can lead to long-term cost savings and reduced maintenance needs.

Comparison of Different NAND Types
NAND Type	SLC	pSLC	3D TLC
P/E Cycle	60K	30K	3K
Write Latency	250µs	250µs	2000µs
Performance	★★★	★★★	★★
Cost	$$$	$$	$

By combining the best features of SLC and 3D TLC NAND, pSLC technology in Exascend flash storage devices offers a compelling solution for applications that demand both high durability and impressive performance, striking a balance between innovation and reliability.