A dynamic random access memory (DRAM) having pairs of bitlines, each pair
being connected to a first bit line sense amplifier, wordlines crossing
the bitlines pairs forming an array, charge storage cells connected to
the bitlines, each having an enable input connected to a wordline, the
bit line sense amplifiers being connected in a two dimensional array,
pairs of primary databuses being connected through first access
transistors to plural corresponding bit line sense amplifiers in each row
of the array, apparatus for enabling columns of the first access
transistors, databus sense amplifiers each connected to a corresponding
data bus pair, a secondary databus, the secondary databus being connected
through second access transistors to the databus sense amplifiers, and
apparatus for enabling the second access transistors, whereby each the
primary databus pair may be shared by plural sense amplifiers in a
corresponding row of the array and the secondary databus may be shared by
plural primary databus pairs.