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 DDR Memory Modules
Product Name:
  ddr2 667 512mb
  DDR Memory Modules / DDR2 RAM
1. 5 years warranty 2.Delivery time :2~3 working days 3.Full compacibility 4.Good price

 We assure you High Quality, Best Price and Fast Delivery.
1.DDRII 533/667/800 MHz 
2.168/184/240-pin socket type dual in line memory module (DIMM) 
3.2.6V power supply 
4.Data rate: 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.

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