Rambus (RMBS) - Eagle or Penguin Message Board

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Technology Stocks : Rambus (RMBS) - Eagle or Penguin

RMBS 101.61

+2.8%

Dec 5 9:30 AM EST

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To: grok who wrote (28840)	9/7/1999 12:27:00 AM
From: Bilow	Read Replies (1) of 93625

Hi KZNerd; A note on those 8 inch busses... The maximum number of direct RDRAMs that you can put on one bus is eight. You will have to take my word that this maximum is related to the maximum length of the bus. Board designers will attempt to place those eight chips as close as possible. From this link, courtesy of Samsung: usa.samsungsemi.com The package dimensions for the edge bonded uBGA on page 61 of 64 is 7.7 x 12.7 mm. Eight across the short dimension would have a total width of 61.6mm or 2.5 inches. Spacing them out by a (sloppy) factor of two, would give a total distance of about five inches. Wire lengths should be held to around 6.5 inches. Adding the controller might take the wire length to 7 inches or so. While it might be possible to use longer busses, there isn't any reason or need to do so. -- Carl

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