MT18LD272A Micron Technology, MT18LD272A Datasheet - Page 7

• Manufacturer Part Number: MT18LD272A
• Description: (MT18LD272A / MT18LD472A) NONBUFFERED DRAM DIMMs
• Manufacturer: Micron Technology

OBSOLETE
SERIAL PRESENCE-DETECT MATRIX
NOTE:
2, 4 Meg x 72 Nonbuffered DRAM DIMMs
DM60.p65 – Rev. 6/98
99-125 MANUFACTURE SPECIFIC DATA (RSVD)
15-61
65-71
73-90
95-98
BYTE
10
11
12
13
14
62
63
64
72
91
92
93
94
0
1
2
3
4
5
6
7
8
9
NUMBER OF BYTES USED BY MICRON
TOTAL NUMBER OF SPD MEMORY BYTES
MEMORY TYPE
NUMBER OF ROW ADDRESSES
NUMBER OF COLUMN ADDRESSES
NUMBER OF BANKS
DATA WIDTH
DATA WIDTH (continued)
VOLTAGE INTERFACE
RAS# ACCESS TIME (
CAS# ACCESS TIME (
MODULE CONFIGURATION TYPE
REFRESH RATES
DRAM WIDTH (PRIMARY DRAM)
ERROR CHECKING DRAM DATA WIDTH
RESERVED
SPD REVISION
CHECKSUM FOR BYTES 0-62
MANUFACTURER’S JEDEC ID CODE
MANUFACTURER’S JEDEC CODE (CONT.)
MANUFACTURING LOCATION
MODULE PART NUMBER (ASCII)
PCB IDENTIFICATION CODE
IDENTIFICATION CODE (CONT.)
YEAR OF MANUFACTURE IN BCD
WEEK OF MANUFACTURE IN BCD
MODULE SERIAL NUMBER
1. “1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW.”
2. x = Variable Data.
DESCRIPTION
t
t
CAC)
RAC)
15.625 s/NORMAL
ENTRY (VERSION)
FAST PAGE MODE
EDO PAGE MODE
16MB -5 (EDO)
16MB -6 (EDO)
16MB -6 (FPM)
32MB -5 (EDO)
32MB -6 (EDO)
32MB -6 (FPM)
10 (16MB)
11 (32MB)
x8 (16MB)
x4 (32MB)
x8 (16MB)
x4 (32MB)
50ns (-5)
60ns (-6)
13ns (-5)
15ns (-6)
MICRON
REV. 0
LVTTL
NONE
ECC
128
256
x72
11
1
1
2
3
4
0
7
BIT7
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
x
0
0
0
0
0
x
x
x
–
BIT6
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
0
0
0
0
0
0
0
0
0
–
x
x
x
x
NONBUFFERED DRAM DIMMs
Micron Technology, Inc., reserves the right to change products or specifications without notice.
BIT5
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
1
1
1
0
0
0
0
x
0
0
0
0
0
x
x
x
–
BIT4
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
1
0
1
0
0
0
0
x
0
0
0
0
0
x
x
x
–
BIT3
0
1
0
0
1
1
1
0
1
0
0
0
1
1
1
0
0
1
0
1
0
0
0
1
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
–
x
x
x
x
BIT2
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
1
0
1
0
0
0
1
1
0
1
1
1
1
0
0
0
1
x
0
0
0
1
0
x
x
x
–
2, 4 MEG x 72
BIT1
0
0
0
1
1
1
1
0
0
0
0
1
0
0
1
1
0
0
0
0
0
0
0
1
1
0
1
1
1
0
1
0
1
1
0
x
0
1
1
0
0
x
x
x
–
1998, Micron Technology, Inc.
BIT0
0
0
1
0
1
0
1
1
0
0
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
1
0
1
0
1
0
1
0
0
–
x
x
x
x
HEX
0D
80
08
01
02
0B
0A
0B
01
48
00
01
32
3C
02
00
08
04
08
04
00
00
3A
46
45
33
3E
2C
01
02
03
04
01
02
03
04
00
0F
3F
FF
xx
xx
xx
xx
–