64, 128, 256 Meg x 64 Unbuffered DDR2 SDRAM DIMM
Micron Technology reserves the right to change products or specifications without notice.
BL0001.pdf Rev. 2/14/08
©2008, Micron Technology
1
512MB / 1GB / 2GB (x64)
UNBUFFERED DDR2 SDRAM DIMM
DDR2 UNBUFFERED
SDRAM DIMM
BL6464AA
BL12864AA
BL25664AA
FEATURES
• 240-pin dual in-line memory module (DIMM)
• Fast data transfer rates: PC2-8500, PC2-6400, or PC2-
5300
• 512MB (64 Meg x 64), 1GB (128 Meg x 64), and 2GB
(256 Meg x 64)
• Exclusively designed for high-performance systems
• Critical performance parameters tested for functionality
• Speed verification performed in-system
•VDD = +2.2V ±0.1V, VDDQ = +2.2V ±0.1V
•VDDSPD = +1.7V to +3.6V
• Differential data strobe (DQ, DQS#) option
• Four-bit prefetch architechture
• Auto Refresh (CBR) and Self Refresh Mode
• 7.8125
μs maximum average periodic refresh interval
• 64ms, 8,192-cycle refresh
• On-die termination (ODT)
• Serial Presence Detect (SPD) with EEPROM
• Gold edge contacts
• Aluminum heat spreader
• 1.18” (30mm) PCB Height
PART NUMBERS
MODULE
MEMORY CLOCK/
BANKING
COMPONENT
PART NUMBER
DENSITY
DATA BIT RATE
CONFIGURATION
CONFIGURATION
BL6464AA804
512MB
2.5ns/800 MT/s
Single
64 Meg x 8
BL6464AA663
512MB
3.0ns/667 MT/s
Single
64 Meg x 8
BL12864AA1065
1GB
1.87ns/1066 MT/s
Single
128 Meg x 8
BL12864AA804
1GB
2.5ns/800 MT/s
Single
128 Meg x 8
BL12864AA663
1GB
3.0ns/667 MT/s
Single
128 Meg x 8
BL25664AA804
2GB
2.5ns/800 MT/s
Dual
128 Meg x 8
TIMING PARAMETERS
MODULE
MODULE
LATENCY
MARKING
BANDWIDTH
(CL - tRCD - tRP - tRAS)
1065
8.5 GB/s
5 - 5 - 5 - 15 *
804
6.4 GB/s
4 - 4 - 4 - 12 *
663
5.3 GB/s
3 - 3 - 3 - 12 *
* Perfomance is verified during testing.
Crucial® Ballistix™ products are warranted to meet the datasheet specifications as found on its web page www.crucial.com/ballistix.
Some system configurations may not be designed to operate or may not operate at the published Crucial Ballistix memory speed and
timing 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, and the Ballistix logo are trademarks of Micron Technology, Inc. All other trademarks are the property of their respective owners.
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