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 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.
1
72
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
· Power
3.56 Watt Max Active (70 nS)
3.124 Watt Max Active (80 nS)
88 mW Max Standby
4.00 Watt Max Active (60nS)
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.
· Available in leadless SIM or leaded Zip versions
· Downward compatible with AK532256
FEATURES
· Upward compatible with AK5321024, AK5322048, AK5324096
· 524,288 x 32 bit organization
and AK5328192
· 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 0oC to 70oC
· Single 5 Volt Power Supply
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
· 512 Refresh Cycles, 8mSEC
· Available in Fast Page Mode and EDO
PIN NOMENCLATURE
PIN ASSIGNMENT
A0 - A8
Address Inputs
PIN #
1
SYMBOL
Vss
PIN #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
SYMBOL
NC
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
SYMBOL
NC
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
DQ1 - DQ32
CAS0 - CAS3
RAS0 - RAS3
WE
Data In/Data Out
Column Address Strobe
Row Address Strobe
Write Enable
2
D1
DQ5
DQ21
DQ6
DQ22
DQ7
DQ23
DQ8
DQ24
A7
NC
3
DQ17
DQ2
DQ18
DQ3
DQ19
DQ4
DQ20
Vcc
Vss
4
CAS0
CAS2
CAS3
CAS1
RAS0
RAS1
NC
5
6
DQ30
DQ14
DQ31
DQ15
DQ32
DQ16
NC
7
8
PD1 - PD4
Vcc
Presence Detect
5v Supply
9
10
11
12
13
14
15
16
17
18
NC
NC
WE
Vss
Ground
A0
Vcc
NC
A1
A8
DQ9
PD1
NC
No Connect
A2
NC
DQ25
DQ10
DQ26
DQ11
DQ27
PD2
A3
RAS3
RAS2
NC
PD3
A4
PD4
MODULE OPTIONS
A5
NC
A6
NC
Vss
Leadless SIM: AK532512W
Leaded ZIP: AK532512Z
Presence Detect -
-60
-70
-80
PD1
PD2
PD3
PD4
NC
Vss
NC
NC
NC
Vss
Vss
NC
NC
Vss
NC
Vss