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Semiconductor memory device

  • US 6,317,377 B1
  • Filed: 04/11/2000
  • Issued: 11/13/2001
  • Est. Priority Date: 04/12/1999
  • Status: Expired due to Term
First Claim
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1. A semiconductor memory device having a plurality of input/output pads for receiving and outputting serial data, said memory device comprising:

  • a plurality of memory cell arrays which store and transfer data in a parallel format;

    at least one serial-to-parallel converter/parallel-to-serial converter combination, wherein said serial-to-parallel converter converts said serial input data into said parallel format for transfer internal to said memory device and said parallel-to-serial converter converts said internal parallel data into serial format as output data from said memory device, and a temporary storage unit integral to each said serial-to-parallel converter/parallel-to-serial converter combination, said temporary storage unit comprising a plurality of flipflops to store data in parallel format, wherein each said serial-to-parallel converter/parallel-to-serial converter combination and integral temporary storage unit serve at least two said memory cell arrays that are adjacent, and wherein said plurality of flipflops in said temporary storage unit are disposed in position such that said flipflops storing data which are initially outputted to the exterior are positioned in closest proximity to said input/output pads.

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