SSTV16859 Datasheet, Philips

* Stub-series terminated logic for 2.5 V VDD (SSTL_2)
* Optimized for stacked DDR (Double Data Rate) SDRAM applications DDR (Double Data Rate) SDRAM and SDRAM I.

DDR (Double Data Rate) SDRAM and SDRAM II Memory Modules. Different from traditional SDRAM, DDR SDRAM transfers data on.