DRAM

What does 'DDR (double data rate)' in DDR SDRAM mean?

  1. AData is transferred on both the rising and falling edges of the clock
  2. BTwo DRAM chips are stacked
  3. CIt operates at twice the supply voltage
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Answer: A. Data is transferred on both the rising and falling edges of the clock

DDR transfers data on both the rising and falling edges of the clock, achieving twice the data rate at the same clock frequency. With each generation (DDR2, DDR3, DDR4, DDR5), transfer rates have increased and supply voltages have decreased.

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More DRAM questions

  1. In a DRAM cell array, which line connects to the gates of the cell transistors and selects the row to be read or written?
  2. How does the data retention time of DRAM cells generally change as temperature rises?
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