Sharp stacked CSP memory boasts 200Mb capacity

The company has developed a four-chip stacked CSP memory device that integrates two 64Mb NOR Flash memory chips, a 64Mb RAM and an 8Mb low-power SRAM into a single package, achieving the industry's highest memory capacity in the smallest size for a composite memory, the company says.

This device, designated as LRS1B07, is designed for next-generation mobile phones and PDAs that are manufactured with increasingly sophisticated features. The memory chip supports mobile multimedia services such as e-commerce transaction processing, videophone and information-on-demand distribution for images, music and games.

The stacked CSP memory product is based on proprietary Sharp CSP technology, which integrates three memory types required for mobile phones: Flash for storing programs and fonts; Smartcombo RAM for holding computational data such as images; and low-power SRAM for working memory. With each memory type offering 128Mb, 64Mb and 8Mb capacity, respectively, the stacked memory chip achieves a memory capacity up to 200Mb.

The chip design cuts both mounting space requirements and parts count, enabling a lighter and more compact device for mobile products. The package size measures only 8-by-11mm.

The LRS1B07 also boasts a 65ns access time.

Samples are quoted at about $68.30.