The W972GG6KB is a 2G bits DDR2 SDRAM, and speed involving 18, 25/25I, and 3/3I. Double Data Rate architecture: two data transfers per clock cycle CAS Latency: 3, 4, 5, 6 and 7 Burst Length: 4 and 8 Bidirectional, differential data strobes (DQS and /DQS ) are transmitted / received with data Edgealigned with Read data and centeraligned with Write data DLL aligns DQ and DQS transitions with clock Differential clock inputs (CLK and /CLK) Data masks (DM) for write data Commands entered on each positive CLK edge, data and data mask are referenced to both edges of /DQS Posted /CAS programmable additive latency supported to make command and data bus efficiency Read Latency Additive Latency plus CAS Latency (RL AL CL) OffChipDriver impedance adjustment (OCD) and OnDieTermination (ODT) for better signal quality Autoprecharge operation for read and write bursts Auto Refresh and Self Refresh modes Precharged Power Down and Active Power Down Write Data Mask Write Latency Read Latency 1 (WL RL 1) Interface: SSTL_18 Manufacturer: Winbond Product Category: DRAM RoHS: Type: SDRAM DDR2 Mounting Style: SMD/SMT Package / Case: WBGA84 Data Bus Width: 16 bit Organization: 128M x 16 Memory Size: 2Gbit Supply Voltage Max: 1.9V Supply Voltage Min: 1.7V Supply Current Max: 80 mA Minimum Operating Temperature: 0 C Maximum Operating Temperature: 85 C