512MB DDR 400MHz VDATA RAM.
                                                                                                                            
                                                                                                                    

The DDR400 module for desktop is a double data rate module composed of CMOS Double Data Rate SDRAMs in TSOP-II 400mil 66pin package and one 2Kbit EEPROM in 8pin TSSOP(TSOP) package on a 184pin glass–epoxy printed circuit board.

DDR400 is a dual in-line memory module and is intended for mounting onto 184-pins edge connector sockets. Synchronous design allows precise cycle control with the use of system clock. Data I/O transactions are possible on both edges of DQS. Range of operating frequencies, programmable latencies and burst lengths allow the same device to be useful for a variety of high bandwidth, high performance memory system applications.

The DDR400 module for desktop is offered in quantities in 128MB up to 1GB capacities •DLL aligns DQ and DQS transition with CK transition
• Double-data-rate architecture
• Bi-directional data strobe (DQS)
• Differential clock inputs(CK and /CK)
• Auto refresh and self refresh
• 8192 refresh cycles / 64ms
• Power supply: VDD, VDDQ: 2.7V+/-0.1V
• Programmable Burst length (2,4,8)
• Serial Presence Detect with EEPROM