DDR2 SDRAM UDIMM
MT18HTF6472AY – 512MB
MT18HTF12872AY – 1GB
MT18HTF25672AY – 2GB
MT18HTF51272AY – 4GB
Features
•
240-pin, unbuffered dual in-line memory module
•
Fast data transfer rates: PC2-6400, PC2-5300,
PC2-4200, or PC2-3200
•
512MB (64 Meg x 72), 1GB (128 Meg x 72),
2GB (256 Meg x 72), 4GB (512 Meg x 72)
•
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
t
CK
•
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
•
Dual rank
Figure
1: 240-Pin UDIMM (MO-237 R/C G or RC/ B)
Module Height: 30mm (1.181in.)
Options Marking
•
Operating temperature
– Commercial (0°C ≤ T
A
≤ +70°C)
None
– Industrial (–40°C ≤ T
A
≤ +85°C)
1
I
•
Package
–
240-pin DIMM (lead-free) Y
•
Frequency/CL
2
–
2.5ns @ CL = 5 (DDR2-800)
3
-80E
–
2.5ns @ CL = 6 (DDR2-800)
3
-800
–
3ns @ CL = 5 (DDR2-667) -667
–
3.75ns @ CL = 4 (DDR2-533 -53E
–
5.0ns @ CL = 3 (DDR2-400) -40E
Notes:
1. Contact Micron for industrial temperature
module offerings.
2. CL = CAS (READ) latency.
3. Not available only in 512MB module density.
Table 1: Key Timing Parameters
Speed
Grade
Industry
Nomenclature
Data Rate (MT/s) t
RCD
(ns)
t
RP
(ns)
t
RC
(ns)CL = 6 CL = 5 CL = 4 CL = 3
-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
512MB, 1GB, 2GB, 4GB (x72, DR) 240-Pin DDR2 SDRAM UDIMM
Features
PDF: 09005aef80e8ad4d
htf18c64_128_256_512x72ay – Rev. I 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.