MT18VDDF12872DY-40BD3 Micron Technology Inc, MT18VDDF12872DY-40BD3 Datasheet - Page 30

• Manufacturer Part Number: MT18VDDF12872DY-40BD3
• Description: MODULE DDR 1GB 184-DIMM
• Manufacturer: Micron Technology Inc

Specifications of MT18VDDF12872DY-40BD3

• Memory Type: DDR SDRAM
• Memory Size: 1GB
• Speed: 400MT/s
• Package / Case: 184-DIMM
• Main Category: DRAM Module
• Sub-category: DDR SDRAM
• Module Type: 184RDIMM
• Device Core Size: 72b
• Organization: 128Mx72
• Total Density: 1GByte
• Chip Density: 512Mb
• Access Time (max): 700ps
• Maximum Clock Rate: 400MHz
• Operating Supply Voltage (typ): 2.6V
• Operating Current: 1.8A
• Number Of Elements: 18
• Operating Supply Voltage (max): 2.7V
• Operating Supply Voltage (min): 2.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Pin Count: 184
• Mounting: Socket
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 19: EEPROM Device Select Code
The most significant bit (b7) is sent first
Table 20: EEPROM Operating Modes
pdf: 09005aef8074e85b, source: 09005aef8072fe49
DDF18C64_128x72G.fm - Rev. C 11/04 EN
SELECT CODE
MODE
Memory Area Select Code (two arrays)
Protection Register Select Code
Current Address Read
Random Address Read
Sequential Read
Byte Write
Page Write
SDA OUT
SDA IN
SCL
t SU:STA
Figure 17: SPD EEPROM Timing Diagram
RW BIT
1
0
1
1
0
0
t F
t HD:STA
t LOW
t AA
V
V
V
V
IH
IH
IH
IH
WC
V
V
or V
or V
or V
or V
IL
IL
b7
IL
IL
IL
IL
t HIGH
1
0
DEVICE TYPE IDENTIFIER
t HD:DAT
BYTES
30
1
1
1
1
16
1
b6
0
1
t DH
INITIAL SEQUENCE
START, Device Select, RW = ‘1’
START, Device Select, RW = ‘0’, Address
reSTART, Device Select, RW = ‘1’
Similar to Current or Random Address Read
START, Device Select, RW = ‘0’
START, Device Select, RW = ‘0’
t R
Micron Technology, Inc., reserves the right to change products or specifications without notice.
184-PIN DDR SDRAM RDIMM
b5
1
1
t SU:DAT
512MB, 1GB (x72, ECC, SR)
b4
0
0
SA2
SA2
b3
CHIP ENABLE
©2004 Micron Technology, Inc. All rights reserved.
SA1
SA1
b2
t SU:STO
t BUF
SA0
SA0
b1
UNDEFINED
RW
RW
RW
b0