DDR-RAM

DDR1,DDR2,DDR3 Desktop Computer,laptop computer 512MB/1G/2G/4G 1) DDR 400/333 & DDRII 533/667/800 MHz/1066/1333mhz 2) 184/240-pin socket type dual in line memory module (DIMM) 3) 2.6V power supply 4) Data rate: 400/333/533/667/800Mbps (max ) 5) 2.5 V (SSTL-2 compatible) I/O for DDR I products, 1.8Vpower supply for DDR II products 6) Double-data-rate architecture, two data transfers per clock cycle. 7) Bi-directional, differential data strobe (DQS) is transmitted/received with data, to be used in capturing data at the Receiver 8) Data inputs and outputs are synchronized with DQS 9) DQS is edge aligned with data for read, center aligned with data for write. 10) Differential clock inputs (CK and CK) 11) DLL aligns DQ and DQS transitions with CK transitions. 12) Commands entered on each positive CK edge: Data and data mask referenced to both edges of DQS... 13) Four internal banks for concurrent operation (component) 14) Data mask(DM) for write data ... 15) Auto precharge option for each burst access 16) Programmable burst length: 2, 4, 8 17) Programmable/CAS latency (CL): 3 18) Programmable output driver strength: Normal/weak 19) Refresh cycles: (8192 refresh cycles/64ms) 20) 7.8US maximum average periodic refresh interval 21) Posted CAS by programmable additive latency for better command and data bus efficiency 22) Off-chip-driver impedance adjustment and on-die-termination for better signal quality 23) DQS can be disabled for single-ended data strobe operation 24) 2 variations of refresh 25) Auto refresh. retail blister packing weight : 0.025kg /PC Dimention: 180*40*8mm.