W3HG2128M72ACER-AD6

White Electronic Designs W3HG2128M72ACER-AD6 PRELIMINARY* www.DataSheet4U.com 2GB – 2x128Mx72 DDR2 SDRAM REGISTERED, w/PLL, VLP FEATURES 240-pin, dual in-line very low profile (VLP) memory module Fast data transfer rates: PC2-6400*, PC2-5300*, PC2-4300 and PC2-3200 Utilizes 800, 667, 533 and 400 Mb/s DDR2 SDRAM components VCC = VCCQ = 1.8V VCCSPD = +1.7V to +3.6V Differential data strobe (DQS, DQS#) option Four-bit prefetch architecture DLL to align DQ and DQS transitions with CK Multiple internal device banks for concurrent operation Supports duplicate output strobe (RDQS/RDQS#) Programmable CAS# latency (CL): 3, 4, 5 and 6 Adjustable data-output drive strength On-die termination (ODT) Posted CAS# additive latency: 0, 1, 2, 3 and 4 Serial Presence Detect (SPD) with EEPROM 64ms: 8,192 cycle refresh Gold edge contacts ECC error detection and correction Dual Rank RoHS compliant Package option 240 Pin VLP: 18.29mm (0.720") TYP DESCRIPTION The W3HG2128M72ACER is a 2x128Mx72 Double Data Rate DDR2 SDRAM high density module based on DDR2 SDRAM components. This memory module consists of eighteen stacks of 256Mx4 bit with 4 banks DDR2 Synchronous DRAMs in FBGA packages, mounted on a 240-pin DIMM FR4 substrate. * This product is under development, is not qualified or characterized and is subject to change without notice. NOTE: Consult factory for availability of: Vendor source control options Industrial temperature option Parity function OPERATING FREQUENCIES PC2-3200 Clock S...