2GB, 4GB (x72, ECC, DR) 240-Pin DDR2 SDRAM RDIMM
Features
DDR2 SDRAM RDIMM
MT36HTF25672PY – 2GB
MT36HTF51272PY – 4GB
Features
Figure 1: 240-Pin RDIMM
(MO-237 R/C J – 2GB; R/C L – 4GB )
• 240-pin, registered dual in-line memory module
• Fast data transfer rates: PC2-3200, PC2-4200,
PC2-5300, or PC2-6400
• 2GB (256 Meg x 72) or 4GB (512 Meg x 72)
• Supports ECC error detection and correction
• VDD = VDDQ = +1.8V
• VDDSPD = 1.7–3.6V
• JEDEC-standard 1.8V I/O (SSTL_18-compatible)
• Differential data strobe (DQS, DQS#) option
• 4n-bit prefetch architecture
• Dual rank
• 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
Module height: 30mm (1.18in)
Options
• Parity
• Operating temperature
– Commercial (0°C ≤ TA ≤ +70°C)
– Industrial (–40°C ≤ TA ≤ +85°C)1
• Package
– 240-pin DIMM (lead-free)
• Frequency/CL2
– 2.5ns @ CL = 5 (DDR2-800)3
– 2.5ns @ CL = 6 (DDR2-800)3
– 3.0ns @ CL = 5 (DDR2-667)
– 3.75ns @ CL = 4 (DDR2-533)
– 5.0ns @ CL = 3 (DDR2-400)
Notes:
Marking
P
None
I
Y
-80E
-800
-667
-53E
-40E
1. Contact Micron for industrial temperature
module offerings.
2. CL = CAS (READ) latency; registered mode
will add one clock cycle to CL.
3. Contact Micron for product availability.
Table 1: Key Timing Parameters
Data Rate (MT/s)
Speed
Grade
Industry
Nomenclature
CL = 6
CL = 5
CL = 4
CL = 3
(ns)
tRP
(ns)
tRC
(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: 09005aef818e3fc8
htf36c256_512x72py.pdf - Rev. D 3/10 EN
1
tRCD
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2005 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.
