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
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
•
Single rank
Figure 1: 240-Pin UDIMM (MO-237 R/C C)
Module height 30.0mm (1.18in)
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)
4
-80E
–
2.5ns @ CL = 6 (DDR2-800)
4
-800
–
3.0ns @ CL = 5 (DDR2-667) -667
–
3.75ns @ CL = 4 (DDR2-533)
3
-53E
–
5.0ns @ CL = 3 (DDR2-400)
3
-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
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
128MB, 256MB, 512MB (x64, SR) 240-Pin DDR2 SDRAM UDIMM
Features
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.