"There's really no current impact to Apple," said Michael Yang, a principal analyst with IHS iSuppli who covers NAND flash memory. "But there may be in two to three months."

The impact delay, Yang explained, is due to the long production cycle of flash memory, which takes about two and a half months.

Concern about potential NAND shortages have centered around Toshiba, the Japanese company that produces about 40% of the world's flash memory. Toshiba shut down its fabrication plants on Monday to assess damage and the impact of the rolling blackouts that have been implemented in Japan because of the crisis at a Fukushima Daiichi nuclear power plant on the northeast coast.

Even a short interruption can have a domino effect, said Yang, depending on where in the fabrication process the memory chips are when a line is shut down. Toshiba has acknowledged that it has lost some of the wafers being fabricated at its main NAND plant near Tokyo.

"We may see a hiccup in NAND supply around the end of April or beginning of May," said Yang today.