MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK532512W high density memory module is a CMOS
dynamic RAM organized in 512K x 32 bit words. The module con-
sists 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.
This configuration allows socket-mounting of large quantities of
memory in applications where high density and ease of inserting ad-
ditional memory are important.
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 DQ
1
to DQ
17
,
DQ
2
to DQ
18
and alternately strobing RAS
0
with RAS
1
and RAS
2
with RAS
3
.
+
1
ACCUTEK
AK532512W
524,288 Word by 32 Bit CMOS
Dynamic Random Access Memory
+
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
·
Upward compatible with AK5321024, AK5322048, AK5324096
and AK5328192
FEATURES
·
524,288 x 32 bit organization
·
72 pin Single In-Line Module
·
Multiple CAS and RAS lines allow x16 or x32 bit widths
·
CAS-before-RAS Refresh, RAS-only Refresh or Hidden refresh
·
Operating free air temperature 0 C to 70 C
·
Single 5 Volt Power Supply
·
512 Refresh Cycles, 8mSEC
·
Available in Fast Page Mode and EDO
o
o
ADDITIONAL OPTIONS AVAILABLE
·
256K x 32 version, AK532256
·
1 Meg x 32 version, AK5321024
·
2 Meg x 32 version, AK5322048
·
4 Meg x 32 version, AK5324096
·
8 Meg x 32 version, AK5328192
PIN NOMENCLATURE
A
0
- A
8
DQ
1
- DQ
32
CAS
0
- CAS
3
RAS
0
- RAS
3
WE
PD
1
- PD
4
Vcc
Vss
NC
Address Inputs
Data In/Data Out
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
PIN ASSIGNMENT
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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
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
MODULE OPTIONS
Leadless SIM: AK532512W
Leaded ZIP: AK532512Z
Presence Detect -
PD1
PD2
PD3
PD4
-60
NC
Vss
NC
NC
-70
NC
Vss
Vss
NC
-80
NC
Vss
NC
Vss
ACCUTEK [ ACCUTEK MICROCIRCUIT CORPORATION ]
