1Gb: x4, x8, x16 DDR2 SDRAM
Features
DDR2 SDRAM
MT47H256M4 – 32 Meg x 4 x 8 banks
MT47H128M8 – 16 Meg x 8 x 8 banks
MT47H64M16 – 8 Meg x 16 x 8 banks
Options1
Features
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• Configuration
– 256 Meg x 4 (32 Meg x 4 x 8 banks)
– 128 Meg x 8 (16 Meg x 8 x 8 banks)
– 64 Meg x 16 (8 Meg x 16 x 8 banks)
• FBGA package (Pb-free) – x16
– 84-ball FBGA (8mm x 12.5mm)
Rev. G, H
• FBGA package (Pb-free) – x4, x8
– 60-ball FBGA (8mm x 11.5mm)
Rev. G
• FBGA package (Pb-free) – x4, x8
– 60-ball FBGA (8mm x 10mm) Rev. H
• FBGA package (lead solder) – x16
– 84-ball FBGA (8mm x 12.5mm)
Rev. G, H
• FBGA package (lead solder) – x4, x8
– 60-ball FBGA (8mm x 11.5mm)
Rev. G
• FBGA package (lead solder) – x4, x8
– 60-ball FBGA (8mm x 10mm) Rev. H
• Timing – cycle time
– 1.875ns @ CL = 7 (DDR2-1066)
– 2.5ns @ CL = 5 (DDR2-800)
– 2.5ns @ CL = 6 (DDR2-800)
– 3.0ns @ CL = 4 (DDR2-667)
– 3.0ns @ CL = 5 (DDR2-667)
– 3.75ns @ CL = 4 (DDR2-533)
• Self refresh
– Standard
– Low-power
• Operating temperature
– Commercial (0°C ≤ TC ≤ 85°C)
– Industrial (–40°C ≤ TC ≤ 95°C;
–40°C ≤ TA ≤ 85°C)
– Automotive (–40°C ≤ TC , TA ≤ 105ºC)
• Revision
VDD = +1.8V ±0.1V, VDDQ = +1.8V ±0.1V
JEDEC-standard 1.8V I/O (SSTL_18-compatible)
Differential data strobe (DQS, DQS#) option
4n-bit prefetch architecture
Duplicate output strobe (RDQS) option for x8
DLL to align DQ and DQS transitions with CK
8 internal banks for concurrent operation
Programmable CAS latency (CL)
Posted CAS additive latency (AL)
WRITE latency = READ latency - 1 tCK
Selectable burst lengths (BL): 4 or 8
Adjustable data-output drive strength
64ms, 8192-cycle refresh
On-die termination (ODT)
Industrial temperature (IT) option
RoHS-compliant
Supports JEDEC clock jitter specification
Note:
PDF: 09005aef821ae8bf
1GbDDR2.pdf – Rev. T 02/10 EN
1
Marking
256M4
128M8
64M16
HR
HQ
CF
HW
HV
JN
-187E
-25E
-25
-3E
-3
-37E
None
L
None
IT
AT
:G/:H
1. Not all options listed can be combined to
define an offered product. Use the Part
Catalog Search on www.micron.com for
product offerings and availability.
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2004 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.
