Monday, October 13, 2014

Advanced technology for MLC NAND flash memory – Elektronik Praxis

This article examines the AMLC architecture and the benefits and application areas, provides the AMLC for NAND Flash memory products.

life, power and data retention are important factors for a NAND density flash memory Device in order to meet the high demands of industrial applications can be, but often impaired due to the higher costs associated with SLC NAND Flash components. With AMLC (advancedMLC) ATP provides a new solution for higher product reliability and performance, and optimized total cost of NAND flash memory solution.

Fundamentals of MLC and AMLC technology

Figure 1 shows the distribution of the Vth states of memory cells in one side / one sector in the MLC technology. Assuming that the number of memory cells, each data pattern in a page / a sector is the same, the Vth states – “11″, “10″, “00″ and “01″ – the data pattern to a Gaussian distribution. And the signal to noise ratio by a Vth state to the next is virtually identical. Taking account of the write-erase cycle limit 3K in the MLC technology this is proportional to the signal to noise ratio.

Supplementary to the topic

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reliability depends on the signal to noise ratio from

A higher reliability of MLC technology, particularly in view of the limitation on 3K P / E cycles, depends largely on the signal to noise ratio. If it is optimized, and the P / E cycles can be improved. Through the use of sophisticated firmware, four states can be summarized in two. Figure 2 shows the ideal distribution of the Vth states of memory cells in the AMLC technology. By combining the states “10″ and “01″ to “1″ and “0″ results in greater signal to noise ratio between “1 and” 0 “, longer P / E cycles, as well as an optimized data retention.

Benefits of AMLC technology

Figure 3 compares the life, power and data storage in the aMLC- with other technologies. The typical life of an SLC memory is between 60K and 100K P / E cycles; that of a client-grade MLC memory at about 1.5K – 3K P / E cycles. In an enterprise-grade MLC memory (eMLC) is the life about 10K; However, this comes at the cost of power / data retention – these are only half as high as in a client-grade MLC memory. ATP AMLC offers a lifetime of at least 40K, because there is no degradation of performance / data management. The data for ATP AMLC were validated using real NAND Flash data, which were carried out in-house tests for IC and memory unit level.

100% burn-in testing at the production level

ATP works with all AMLC products with very high quality NAND ICs, and 100% burn-in testing at the production level. The ATP AMLC product lines include 2.5 “SSDs, SlimSATA and mSATA with flexible storage densities 8-64 GB to cover a wide variety of form factors and densities. The flexibility in the storage density underlines the benefits of the technology – a 13 times longer life than conventional MLC NAND products, three times faster writing and a five times better data retention.

The average densities satisfy the requirements of the industry with respect to read-intensive or power-dependent applications, eg Boats, fast back-up in case of sudden power failure, data logging, monitoring networks or caching in the corporate sector.

Resiliency and risk in minimize the industry

Removable NAND memory

09/24/14 – Removable NAND flash is widely used in industrial and consumer market. This reliability is required and risk mitigation measures must be taken. read more …

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