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参数资料
| 型号： | AK536512Z |
| 厂商： | Accutek Microcircuit Corporation |
| 英文描述： | 524,288 Word by 36 Bit CMOS Dynamic Random Access Memory |
| 中文描述： | 524288字36位CMOS动态随机存取存储器 |
| 文件页数： | 1/2页 |
| 文件大小： | 115K |
| 代理商： | AK536512Z |
DESCRIPTION
The Accutek AK536512W high density memory module is a CMOS
dynamic RAM organized in 512K x 36 bit words. The module con-
sists of sixteen standard 256K x 4 DRAMs in plastic SOJ packages
and eight 256K x 1 DRAMs in PLCC packages. The assembly has
12dramsmountedoneachsideofaprintedcircuitboardina72pad
leadless SIM configuration.
This configuration allows socket-mounting of large quantities of
memoryinapplicationswherehighdensityandeaseofinsertingad-
ditional memory are important.
The operation of the AK536512 is identical to sixteen 256K x 4 plus
eight 256K x 1 DRAMs. There are four CAS lines and four RAS
lines. On each bank of 256K x 36, independent byte control is ac-
complished by four CAS lines. Each separate CAS line controls
four 256K x 4 DRAMs and two 256K x 1 DRAMs with data in tied to
data out to form a 9 bit byte. Two banks of 36 bits are controlled by
the two pairs of RAS lines. An eighteen bit data path can be pro-
duced by connecting DQ
0
to DQ
18
, DQ
1
to DQ
19
, etc. and alter-
nately strobing RAS
0
with RAS
1
and RAS
2
with RAS
3
.
FEATURES
524,288 x 36 bit organization
72 pad Single In-Line Module
Multiple CAS and RAS lines allow x18 or x36 bit widths
CAS-before-RAS refresh
Operating free air temperature 0
o
C to 70
o
C
Single 5 Volt Power Supply
PIN NOMENCLATURE
Power
5.41 Watt Max Active (70nS)
4.75 Watt Max Active (80 nS)
4.09 Watt Max Active (100 nS)
132 mW Max Standby
512 Refresh Cycles, 8 mSEC
Available in Fast Page Mode and Static Column Mode ver-
sions
Downward compatible with AK536256W
Upward compatible with AK5361024W, AK5362048W,
AK5364096W and AK5368192W
Accutek
Microcircuit
Corporation
AK536512W
524,288 Word by 36 Bit CMOS
Dynamic Random Access Memory
+
+
DQ
0
- DQ
35
Data In/Data Out
A
0
- A
8
Address Inputs
CAS
0
- CAS
3
Column Address Strobe
RAS
0
- RAS
3
Row Address Strobe
WE
Write Enable
PD
Presence Detect
Vcc
5v Supply
Vss
Ground
NC
No Connect
MODULE OPTIONS
Leadless SIM: AK536512W
Leaded ZIP: AK536512Z
PIN ASSIGNMENT
PIN #
1
SYMBOL
Vss
PIN #
19
SYMBOL
NC
PIN #
37
SYMBOL
DQ17
PIN #
55
SYMBOL
DQ12
2
DQ0
20
DQ4
38
DQ35
56
DQ30
3
DQ18
21
DQ22
39
Vss
57
DQ13
4
DQ1
22
DQ5
40
CAS0
58
DQ31
5
DQ19
23
DQ23
41
CAS2
59
Vcc
6
DQ2
24
DQ6
42
CAS3
60
DQ32
7
DQ20
25
DQ24
43
CAS1
61
DQ14
8
DQ3
26
DQ7
44
RAS0
62
DQ33
9
DQ21
27
DQ25
45
RAS1
63
DQ15
10
Vcc
28
A7
46
NC
64
DQ34
11
NC
29
NC
47
WE
65
DQ16
12
A0
30
Vcc
48
NC
66
NC
13
A1
31
A8
49
DQ9
67
PD1
14
A2
32
NC
50
DQ27
68
PD2
15
A3
33
RAS3
51
DQ10
69
PD3
16
A4
34
RAS2
52
DQ28
70
PD4
17
A5
35
DQ26
53
DQ11
71
NC
18
A6
36
DQ8
54
DQ29
72
Vss
Presence Detect -
-60
NC
-70
NC
-80
NC
PD1
PD2
Vss
Vss
Vss
PD3
NC
Vss
NC
PD4
NC
NC
Vss
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