Mobile technology requires new memory

Recent advances in mobile phone technology have generated demand for memory with high levels of functionality and capacity. However, there is no standardisation in the packaging of the chips that power them.

Therefore, if any changes are required in the memory capacity of the chips during the product development phase, the memory-device-mounted area of the printed circuit board requires a redesign, resulting in additional costs and time delays. Also, the new mobile technology requires stacked memory that is more compact and runs on less power, but provides more capacity and speed.

Fujitsu's MB84VZ064A series solves these challenges by standardising the memory packages for mobile phones. Changes in mobile phone specifications during product development can be accommodated by mounting a MCP with the required combination of memory capacity and functions.

For storing data and programs, the MCP uses flash memory fabricated using 0.17-micron process technology with the same characteristics as the four-stacked MCP. Fujitsu's 16, 32 and 64 Megabit FCRAM is designed for mobile phones, supplying access speeds of 80ns/70ns/70ns, respectively. Standby current is 70, 100 and 150 microamps, and powerdown current is 10 microamps.

Pricing for the two-stacked MCP begins at $52 each in 100-unit quantities. Pricing for the four-stacked MCP starts at $120 each in 100-piece units. Production will begin in the second quarter of 2002.