MT12D436 Datasheet, PDF (1/17 Pages) Micron Technology – DRAM MODULE

OBSOLETE
4, 8 MEG x 36
PARITY DRAM SIMMs
DRAM
MODULE
MT12D436
MT24D836
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
• 2,048-cycle refresh distributed across 32ms
• FAST PAGE MODE (FPM) access cycle
• Multiple RAS# lines allow x18 or x36 widths
OPTIONS
• Timing
60ns access
MARKING
-6
• Packages
72 -pin SIMM
M
72 -pin SIMM (gold)
G
72-pin SIMM low profile (1.00")
DM
72-pin SIMM (gold) low profile (1.00") DG
KEY TIMING PARAMETERS
SPEED ^tRC
t_RAC
-6 110ns 60ns
t_PC
35ns
t_AA
30ns
t_CAC
15ns
t_RP
40ns
PART NUMBERS
PART NUMBER
MT12D436G-xx
MT12D436M-xx
MT12D436DG-xx
MT12D436DM-xx
MT24D836G-xx
MT24D836M-xx
xx = speed
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
Gold
Tin/Lead
Gold
Tin/Lead
Gold
Tin/Lead
HEIGHT
1.190"
1.190"
1.000"
1.000"
1.190"
1.190"
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
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
PIN SYMBOL PIN SYMBOL PIN SYMBOL PIN
1
Vss
19
A10
37 DQ18 55
2
DQ1
20
DQ5
38 DQ36 56
3
DQ19 21 DQ23 39
Vss
57
4
DQ2
22
DQ6
40 CAS0# 58
5
DQ20 23 DQ24 41 CAS2# 59
6
DQ3
24
DQ7
42 CAS3# 60
7
DQ21 25 DQ25 43 CAS1# 61
8
DQ4
26
DQ8
44 RAS0# 62
9
DQ22 27 DQ26 45 NC/RAS1#* 63
10
Vcc
28
A7
46
NC
64
11
NC
29 NC (A11) 47
WE#
65
12
A0
30
Vcc
48
NC
66
13
A1
31
A8
49 DQ10 67
14
A2
32
A9
50 DQ28 68
15
A3
33 NC/RAS3#* 51 DQ11 69
16
A4
34 RAS2# 52 DQ29 70
17
A5
35 DQ27 53 DQ12 71
18
A6
36
DQ9
54 DQ30 72
*32MB version only
SYMBOL
DQ13
DQ31
DQ14
DQ32
Vcc
DQ33
DQ15
DQ34
DQ16
DQ35
DQ17
NC
PRD1
PRD2
PRD3
PRD4
NC
Vss
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.
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
1
Micron Technology, Inc., reserves the right to change products or specifications without notice.
„1997, Micron Technology, Inc.