2GB, 4GB (x72, DR) 240-Pin DDR2 SDRAM FBDIMM
Features
DDR2 SDRAM FBDIMM
MT36HTF25672FZ – 2GB
MT36HTF51272FZ – 4GB
Figure 1: 240-Pin FBDIMM (MO-256 R/C E)
Features
• DDR2 functionality and operations supported as de-
fined in the component data sheet
Module height: 30.35mm (1.19in)
• 240-pin, fully buffered dual in-line memory module
(FBDIMM)
• Fast data transfer rates: PC2-6400, PC2-5300, or
PC2-4200
Options
Marking
• 2GB (256 Meg x 72), 4GB (512 Meg x 72)
• Package
• 3.2 Gb/s, 4 Gb/s, or 4.8 Gb/s link transfer rates
– 240-pin DIMM (halogen-free)
• Frequency/CAS latency
– 2.5ns @ CL = 5 (DDR2-800)
– 3.0ns @ CL = 5 (DDR2-667)
Z
• High-speed, 1.5V differential, point-to-point link
between the host controller and advanced memory
buffer (AMB)
-80E
-667
• Fault-tolerant; can work around a bad bit lane in
each direction
Features (Continued)
• High-density scaling with up to eight FBDIMM
devices per channel
• Mixed-signal built-in self-test (MBIST) and inter-
rupt-driven built-in self-test (IBIST) test functions
• SMBus interface to AMB for configuration register
access
• Transparent mode for DRAM test support
• VDD = VDDQ = 1.8V for DRAM
• In-band and out-of-band command access
• Deterministic protocol
• VREF = 0.9V SDRAM command and address termina-
tion
– Enables memory controller to optimize DRAM
accesses for maximum performance
• VCC = 1.5V for AMB
• VDDSPD = 3–3.6V for AMB and EEPROM
• Serial presence-detect (SPD) with EEPROM
• Gold edge contacts
– Delivers precise control and repeatable memory
behavior
• Automatic DDR2 SDRAM bus and channel calibra-
tion
• Dual-rank
• Supports 95°C operation with 2X refresh
• Transmitter de-emphasis to reduce intersymbol in-
terference (ISI)
Table 1: Key Timing Parameters
Data Rate (MT/s)
Speed
Grade Industry Nomenclature
CL = 6
CL = 5
800
667
–
CL = 4
533
CL = 3
400
tRCD (ns)
tRP (ns) tRC (ns)
-80E
-667
-53E
PC2-6400
PC2-5300
PC2-4200
800
–
12.5
15
12.5
15
55
55
55
533
400
–
533
400
15
15
PDF: 09005aef83d491e1
htf36c256_512x72fz.pdf - Rev. D 4/14 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
1
© 2009 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.