ACCUTEK AK532512W Dynamic random access memory Datasheet

AK532512W
524,288 Word by 32 Bit CMOS
Dynamic Random Access Memory
ACCUTEK
MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK532512W high density memory module is a CMOS
dynamic RAM organized in 512K x 32 bit words. The module consists of sixteen standard 256K x 4 DRAMs in plastic SOJ packages.
The assembly has eight drams mounted on each side of a printed
circuit board in a 72 pad leadless SIM configuration.
The operation of the AK532512W is identical to sixteen 256K x 4
Drams. There are four CAS lines and four RAS lines. On each bank
of 256K x 32, independent byte control is accomplished by the four
CAS lines. Each seperate CAS line controls four 256K x 4 Drams.
Two banks of 32 bits are controlled by the two pairs of RAS lines. A
sixteen bit data path can be produced by connecting DQ1 to DQ17,
DQ2 to DQ18 and alternately strobing RAS0 with RAS1 and RAS2
with RAS3.
+
+
This configuration allows socket-mounting of large quantities of
memory in applications where high density and ease of inserting additional memory are important.
1
72
· Power
4.00 Watt Max Active (60nS)
3.56 Watt Max Active (70 nS)
3.124 Watt Max Active (80 nS)
88 mW Max Standby
· Available in leadless SIM or leaded Zip versions
· Downward compatible with AK532256
FEATURES
· Upward compatible with AK5321024, AK5322048, AK5324096
and AK5328192
· 524,288 x 32 bit organization
· 72 pin Single In-Line Module
· Multiple CAS and RAS lines allow x16 or x32 bit widths
ADDITIONAL OPTIONS AVAILABLE
· CAS-before-RAS Refresh, RAS-only Refresh or Hidden refresh
· 256K x 32 version, AK532256
· Operating free air temperature 0oC to 70oC
· 1 Meg x 32 version, AK5321024
· Single 5 Volt Power Supply
· 2 Meg x 32 version, AK5322048
· 512 Refresh Cycles, 8mSEC
· 4 Meg x 32 version, AK5324096
· Available in Fast Page Mode and EDO
· 8 Meg x 32 version, AK5328192
PIN NOMENCLATURE
PIN ASSIGNMENT
A0 - A8
Address Inputs
DQ1 - DQ32
Data In/Data Out
CAS0 - CAS3
Column Address Strobe
RAS0 - RAS3
Row Address Strobe
WE
Write Enable
PD1 - PD4
Presence Detect
Vcc
5v Supply
Vss
Ground
NC
No Connect
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
MODULE OPTIONS
Leadless SIM: AK532512W
SYMBOL
Vss
D1
DQ17
DQ2
DQ18
DQ3
DQ19
DQ4
DQ20
Vcc
NC
A0
A1
A2
A3
A4
A5
A6
PIN #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
SYMBOL
NC
DQ5
DQ21
DQ6
DQ22
DQ7
DQ23
DQ8
DQ24
A7
NC
Vcc
A8
NC
RAS3
RAS2
NC
NC
Presence Detect -
Leaded ZIP: AK532512Z
PD1
PD2
PD3
PD4
-60
NC
Vss
NC
NC
-70
NC
Vss
Vss
NC
-80
NC
Vss
NC
Vss
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
SYMBOL
NC
NC
Vss
CAS0
CAS2
CAS3
CAS1
RAS0
RAS1
NC
WE
NC
DQ9
DQ25
DQ10
DQ26
DQ11
DQ27
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
SYMBOL
DQ12
DQ28
DQ13
DQ29
Vcc
DQ30
DQ14
DQ31
DQ15
DQ32
DQ16
NC
PD1
PD2
PD3
PD4
NC
Vss
FUNCTIONAL DIAGRAM
MECHANICAL DIMENSIONS
4.250"
0.330"
MAX
3.985"
1.000"
MAX
0.425"
0.375"
+
+
0.250"
1
72
0.080"
ACCUTEK
MICROCIRCUIT CORPORATION
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
PHONE: 978-465-6200 FAX: 978-462-3396
Email: [email protected]
Internet: www.accutekmicro.com
0.050"
TYP
0.125"
CL CL
CL CL
Accutek reserves the right to make changes in specifications at any time
and without notice. Accutek does not assume any responsibility for the
use of any circuitry described; no circuit patent licenses are implied. Preliminary data sheets contain minimum and maximum limits based upon
design objectives, which are subject to change upon full characterization
over the specific operating conditions.
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