512MB / 1GB (x64) UNBUFFERED DDR SDRAM DIMM DDR UBUFFERED SDRAM DIMM BL6464Z BL12864Z Features • 184-pin dual in-line memory module (DIMM) Fast data transfer rates: PC4000 or PC3200 512MB (64 Meg x 64) and 1GB (128 Meg x 64) Exclusively designed for high-performance systems Critical performance parameters tested for functionality 7.8125μ s maximum average periodic refresh interval Speed verification performed in-system Serial Presence Detect (SPD) with EEPROM V DD = VDDQ = +2.8V ±0.2V Gold-plated edge contacts V DDSPD = +2.3V to +3.6V Aluminum heat spreader Commands entered on each positive CK edge 1.25” (31.75mm) PCB Height DQS edge-aligned with data for READs; center- aligned with data for WRITEs Internal, pipelined double data rate (DDR) Table 1: Timing Parameters architecture; two data accesses per clock cycle Module Module Latency Bidirectional data strobe (DQS) transmitted/received t t t Marking Bandwidth (CL - RCD - RP - RAS) with data - i.e., source-synchronous data capture 505 4.0 GB/s 2.5 - 4 - 4 - 8 Differential clock inputs CK and CK# 503 4.0 GB/s 3 - 4 - 4 - 8 Four internal device bank s for concurrent operation 402 3.2 GB/s 2 - 2 - 2 - 6 Programmable burst le ngths: 2, 4, or 8 Auto precharge option Auto Refresh and Self Refresh Modes Table 1: Part Numbers Module Memory Clock/ Banking Component Part Number Density Data Bit Rate Configuration Configuration BL6464Z505 512MB 4.0ns/500 MT/s Single 64 Meg x 8 BL6464Z402 512MB 5.0ns/400 MT/s Single 64 Meg x 8 BL12864Z503 1GB 4.0ns/500 MT/s Dual 64 Meg x 8 Crucial® Ballistix™ products are warranted to meet the datasheet specifications as found on its web page http://www.crucial.com/ballistix/ Some system configurations may not be designed to operate or may not operate at the published Crucial Ballistix memory speed andtiming settings. Overclocking, running your system faster than the speed for which it was designed or the published speed, or otherwise modifying your system timing may result in damage to computer components and Crucial disclaims any and all liability for such damage. ©2008 Micron Technology, Inc. All rights reserved. Information is subject to change without notice. Micron, Crucial, the Crucial logo, Ballistix, Ballistix Tracer, and the Ballistix Tracer logo are trademarks of Micron Technology, Inc. All other trademarks are the property of their respective owners. 512MB / 1GB (x64) UNBUFFERED DDR SDRAM DIMM Micron Technology, reserves the right to change products or specifications without notice. BL0002.fm - Rev. 07/10/08 1 ©2008 Micron Technology