MT8HTF6464AY Datasheet, PDF (1/18 Pages) Micron Technology – DDR2 SDRAM UDIMM

256MB, 512MB, 1GB (x64, SR) 240-Pin DDR2 SDRAM UDIMM
Features
DDR2 SDRAM UDIMM
MT8HTF3264AY – 256MB
MT8HTF6464AY – 512MB
MT8HTF12864AY – 1GB
Features
• 240-pin, unbuffered dual in-line memory module
• Fast data transfer rates: PC2-3200, PC2-4200,
PC2-5300, PC2-6400, or PC2-8500
• 256MB (32 Meg x 64), 512MB (64 Meg x 64),
or 1GB (128 Meg x 64
• V_DD = V_DDQ = 1.8V
• V_DDSPD = 1.7–3.6V
• JEDEC-standard 1.8V I/O (SSTL_18-compatible)
• Differential data strobe (DQS, DQS#) option
• 4n-bit prefetch architecture
• Multiple internal device banks for concurrent
operation
• Programmable CAS latency (CL)
• Posted CAS additive latency (AL)
• WRITE latency = READ latency - 1 ^tCK
• Programmable burst lengths (BL): 4 or 8
• Adjustable data-output drive strength
• 64ms, 8192-cycle refresh
• On-die termination (ODT)
• Serial presence detect (SPD) with EEPROM
• Gold edge contacts
• Single rank
Figure 1: 240-Pin UDIMM (MO-237 R/C A and D)
PCB height: 30.0mm (1.18in)
Options
• Operating temperature
– Commercial (0°C ≤ T_A ≤ +70°C)
– Industrial (–40°C ≤ T_A ≤ +85°C)¹
• Package
– 240-pin DIMM (lead-free)
• Frequency/CL²
– 1.875ns @ CL = 7 (DDR2-1066)³
– 2.5ns @ CL = 5 (DDR2-800)
– 2.5ns @ CL = 6 (DDR2-800)
– 3.0ns @ CL = 5 (DDR2-667)
– 3.75ns @ CL = 4 (DDR2-533)⁴
– 5.0ns @ CL = 3 (DDR2-400)
Marking
None
I
Y
-1GA
-80E
-800
-667
-53E
-40E
Notes:
1. Contact Micron for industrial temperature
module offerings.
2. CL = CAS (READ) latency.
3. Available only in 1GB, Rev. E devices.
4. Not recommended for new designs.
Table 1: Key Timing Parameters
Speed
Grade
-1GA
-80E
-800
-667
-53E
-40E
Industry
Nomenclature
PC2-8500
PC2-6400
PC2-6400
PC2-5300
PC2-4200
PC2-3200
CL = 7
1066
Data Rate (MT/s)
CL = 6 CL = 5 CL = 4
800
667
533
800
800
533
800
667
533
–
667
553
–
–
553
–
–
400
CL = 3
400
400
400
400
400
400
t_RCD
(ns)
13.125
12.5
15
15
15
15
t_RP
(ns)
13.125
12.5
15
15
15
15
t_RC
(ns)
58.125
57.5
60
60
55
55
PDF: 09005aef80e2ff8d
htf8c32_64_128x64aypdf - Rev. G 3/10 EN
1
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© 2003 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.