JEDEC Tuesday announced that a new industry standard has been adopted for DDR333, the highest yet approved for double data rate 167-MHz clock rate SDRAMs.
The DDR333 standard memory chips will be used in a new PC2700 module package called a MicroDIMM with a peak throughput of 2.7-gigabytes/second on 64-bit or 72-bit bus lines. The MicroDIMM is a new smaller package of roughly 1 inch by 2 inches.
The DDR333 chips can also be packaged in standard DIMM and SO-DIMM configurations. Up to now the highest DDR modules were PC2100 using PC266 SDRAM chips.
As memory chip maker frequency yields increased, the new faster DDR standard was needed for another speed grade increase in modules. The 2.7-Gbyte/sec data rate of a PC2700 DIMM compares to 1.6-Gbyte/sec for a Direct Rambus DRAM RIMM. In a dual memory channel configuration, the DDR module will have a 5.4-Gbyte/sec data rate. As with all current generation DDR modules, the PC2700 will operate on 2.5V power.