Simmtronics Semiconductors Ltd offers Double-Data-Rate Two Synchronous Dynamic Random Access Memory. Simmtronics Semiconductors Ltd is an ISO 9001 certified company. The Company also manufactures various types of memory modules, motherboards and VGA cards and led products. The Double-Data-Rate Two Synchronous Dynamic Random Access Memory, also known as DDR2 SDRAM, is used in electronic engineering for high speed storage of the working data of a computer or other digital electronic device. The Double-Data-Rate Two Synchronous Dynamic Random Access Memory is available with memory modules of 2048MB, 1024MB, 512MB and 256MB. This Random Access Memory has the ability to operate the external data bus twice as fast.