MT4HTF6464AY Datasheet, PDF (1/19 Pages) Micron Technology – DDR2 SDRAM UDIMM

128MB, 256MB, 512MB (x64, SR) 240-Pin DDR2 SDRAM UDIMM
Features
DDR2 SDRAM UDIMM
MT4HTF1664AY – 128MB
MT4HTF3264AY – 256MB
MT4HTF6464AY – 512MB
Features
• 240-pin, unbuffered dual in-line memory module
(UDIMM)
• Fast data transfer rates: PC2-3200, PC2-4200,
PC2-5300, or PC2-6400
• 128MB (16 Meg x 64), 256MB (32 Meg x 64),
512MB (64 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 C)
Module 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
– 2.5ns @ CL = 5 (DDR2-800)⁴
– 2.5ns @ CL = 6 (DDR2-800)⁴
– 3.0ns @ CL = 5 (DDR2-667)
– 3.75ns @ CL = 4 (DDR2-533)³
– 5.0ns @ CL = 3 (DDR2-400)³
Marking
None
I
Y
-80E
-800
-667
-53E
-40E
Notes:
1. Contact Micron for industrial temperature
module offerings.
2. CL = CAS (READ) latency.
3. Contact Micron for product availability.
4. Not available in 128MB and 256MB.
Table 1: Key Timing Parameters
Speed
Industry
Data Rate (MT/s)
t_RCD
t_RP
t_RC
Grade
Nomenclature
CL = 6
CL = 5
CL = 4
CL = 3
(ns)
(ns)
(ns)
-80E
PC2-6400
800
800
533
400
12.5
12.5
55
-800
PC2-6400
800
667
533
400
15
15
55
-667
PC2-5300
–
667
553
400
15
15
55
-53E
PC2-4200
–
–
553
400
15
15
55
-40E
PC2-3200
–
–
400
400
15
15
55
PDF: 09005aef80ed6fda
htf4c16_32_64x64ay – Rev. H 3/10 EN
1
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2003 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.