OBSOLETE
4, 8 MEG x 36
PARITY DRAM SIMMs
MT12D436
MT24D836
DRAM
MODULE
FEATURES
• JEDEC- and industry-standard pinout in a 72-pin,
single in-line memory module (SIMM)
• 16MB (4 Meg x 36) and 32MB (8 Meg x 36) parity
versions
• High-performance CMOS silicon-gate process
• Single 5V ±10% power supply
• All inputs, outputs and clocks are TTL-compatible
• Refresh modes: RAS#-ONLY, CAS#-BEFORE-RAS#
(CBR) and HIDDEN
PIN ASSIGNMENT (Front View)
72-Pin SIMM
(DD-5) 4 Meg x 36 (shown)
(DD-6) 8 Meg x 36
(DD-7) 4 Meg x 36 Low Profile
• 2,048-cycle refresh distributed across 32ms
• FAST PAGE MODE (FPM) access cycle
• Multiple RAS# lines allow x18 or x36 widths
OPTIONS
• Timing
MARKING
60ns access
-6
• Packages
PIN SYMBOL PIN SYMBOL PIN SYMBOL PIN SYMBOL
72-pin SIMM
72-pin SIMM (gold)
72-pin SIMM low profile (1.00")
M
G
DM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Vss
DQ1
DQ19
DQ2
DQ20
DQ3
DQ21
DQ4
DQ22
Vcc
NC
A0
A1
A2
A3
A4
A5
A6
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A10
DQ5
DQ23
DQ6
DQ24
DQ7
DQ25
DQ8
DQ26
A7
NC (A11)
Vcc
A8
A9
37
38
39
40
41
42
43
44
DQ18
DQ36
Vss
CAS0#
CAS2#
CAS3#
CAS1#
RAS0#
55
56
57
58
59
60
61
62
DQ13
DQ31
DQ14
DQ32
Vcc
DQ33
DQ15
DQ34
DQ16
DQ35
DQ17
NC
PRD1
PRD2
PRD3
PRD4
NC
72-pin SIMM (gold) low profile (1.00")
DG
KEY TIMING PARAMETERS
t
t
t
t
t
t
45 NC/RAS1#* 63
SPEED
RC
110ns
RAC
60ns
PC
35ns
AA
30ns
CAC
15ns
RP
46
47
48
49
50
NC
WE#
NC
DQ10
DQ28
DQ11
DQ29
DQ12
DQ30
64
65
66
67
68
69
70
71
72
-6
40ns
PART NUMBERS
33 NC/RAS3#* 51
PART NUMBER
CONFIGURATION
4 Meg x 36
4 Meg x 36
4 Meg x 36
4 Meg x 36
8 Meg x 36
8 Meg x 36
PLATING
HEIGHT
1.190"
1.190"
1.000"
1.000"
1.190"
1.190"
34
35
36
RAS2#
DQ27
DQ9
52
53
54
MT12D436G-xx
MT12D436M-xx
MT12D436DG-xx
MT12D436DM-xx
MT24D836G-xx
MT24D836M-xx
xx = speed
Gold
Tin/Lead
Gold
Vss
*32MB version only
Tin/Lead
Gold
NOTE: Symbols in parentheses are not used on these modules but may be used
for other modules in this product family. They are for reference only.
Tin/Lead
GENERAL DESCRIPTION
The MT12D436 and MT24D836 are randomly accessed
16MB and 32MB solid-state memories organized in a x36
configuration. During READ or WRITE cycles, each bit is
uniquely addressed through the 22 address bits, which are
entered 11 bits (A0-A10) at a time. RAS# is used to latch the
first 11 bits and CAS# the latter 11 bits. A READ or WRITE
cycle is selected with the WE# input. A logic HIGH on WE#
dictates READ mode, while a logic LOW on WE# dictates
WRITE mode. During a WRITE cycle, data-in (D) is latched
by the falling edge of CAS#. Since WE# goes LOW prior to
CAS# going LOW, the output pin(s) remain open (High-Z)
until the next CAS# cycle.
4, 8 Meg x 36 Parity DRAM SIMMs
DM45.pm5 – Rev. 3/97
Micron Technology, Inc., reserves the right to change products or specifications without notice.
1997, Micron Technology, Inc.
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