{"id":6411,"date":"2021-03-07T20:45:13","date_gmt":"2021-03-07T18:45:13","guid":{"rendered":"https:\/\/tekmart.co.za\/t-blog\/?p=6411"},"modified":"2021-03-07T20:45:14","modified_gmt":"2021-03-07T18:45:14","slug":"multi-level-cell-mlc-a-tech-definition","status":"publish","type":"post","link":"https:\/\/tekmart.co.za\/t-blog\/multi-level-cell-mlc-a-tech-definition\/","title":{"rendered":"multi-level cell (MLC)-a tech definition"},"content":{"rendered":"Reading Time-approximately:<\/span> 3<\/span> minutes<\/span><\/span>\n

Multi-level cell (MLC) flash is a type of\u00a0NAND flash memory\u00a0that can store more than 1 bit per cell. NAND flash is a form of\u00a0nonvolatile storage\u00a0memory, which allows it to retain data without being attached to a power source.<\/strong><\/h2>\n\n\n\n
\"Garry<\/figure>\n\n\n\n

By Garry Kranz<\/a><\/p>\n\n\n\n

What’s the difference between enterprise MLC and consumer MLC?<\/strong><\/h3>\n\n\n\n

Multi-level cell flash is a midpoint between single-level cell (SLC)<\/strong> and triple-level cell (TLC)<\/strong> flash memory. NAND flash has a finite number of write cycles. <\/p>\n\n\n\n

Because multi-level cell flash generally is less expensive than SLC, it is the preferred solid-state storage memory of manufacturers of consumer-based electronic devices.<\/p><\/blockquote><\/figure>\n\n\n\n

Enterprise multi-level cell (eMLC)<\/strong> drives are designed with an enhanced form of multi-level cell flash that can accommodate a larger number of write cycles. Various techniques are used to enable eMLC to be used to design inexpensive enterprise solid-state drives (SSDs). These techniques include algorithms to boost the unrecoverable bit-error rate, flash overprovisioning, wear leveling and\u00a0write amplification. Most of these techniques are enabled by software.<\/p>\n\n\n\n

Consumer-grade MLC flash provides a\u00a0program-erase\u00a0cycle of 3,000 to 10,000 writes, compared to a 20,000 to 30,000 endurance level of eMLC.<\/p>\n\n\n\n

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How multi-level cell flash compares to single-level cell flash<\/strong><\/h3>\n\n\n\n

One of the drawbacks of multi-level cell flash is its higher bit rate when compared to single-level cell NAND flash. The more bits a cell contains, the fewer write cycles it can accommodate and the greater the chance that errors will occur.<\/p>\n\n\n\n

Single-level cell flash uses a high grade of NAND memory, storing 1 bit per cell and always in one of two voltage states: programmed, denoted as 0, or erased, denoted as 1. Having only two states means data in single-level cell flash enables data to be interpreted quickly and reduces\u00a0bit errors. However, since SLC flash stores fewer data bits per cell, it generally is considered a more costly form of storage memory than multi-level cell flash.<\/p><\/blockquote>\n\n\n\n

Multi-level cell flash’s potential for multiple voltage states decreases its manufacturing costs and has led to widespread use of the technology in cellphones, digital cameras, handheld music players and USB flash drives.<\/p>\n\n\n\n

MLC flash memory cards typically deliver a slower transfer speed and consume more power. A multi-level cell is divided into four states, designated by the level of electrical charge applied to the cell. MLC has two states, MLC-3 has eight states and MLC-4 has 16 states.<\/p>\n\n\n\n

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