DDR1

Key Features

  • Chipkill support
  • Legacy system support

Description

Double Data Rate (DDR), also known as DDR1, is the second generation of Synchronous DRAM (SDRAM). As its name implies, double data rate refers to its ability to read and write data on both the rising and falling of the system clock to achieve nearly twice the bandwidth of single data rate (SDR) SDRAM. 

JEDEC developed the DDR SDRAM specification (JESD79) in 2000 and was an advancement over SDRAM technology with increased memory bandwidth and performance. ATP DDR1 modules have 400 MT/s transfer speeds and run at 2.5V, significantly cutting power consumption compared with SDRAM's 3.3V.

Specifications

DDR
DIMM TypeNon-ECC UDIMMNon-ECC SO-DIMM
Density256 MB128 MB to 512 MB / 1 GB
Speed up to (MT/s)400400
PCB HeightLow ProfileLow Profile
Operating Temperature0°C to 70°C0°C to 70°C / -40°C to 85°C

Downloads

  • ATP_DDR1_flyer
    English
    2021-02-241022.80KB
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