ak532256 Accutek Microcircuit Corporation, ak532256 Datasheet
ak532256
Manufacturer Part Number
ak532256
Description
524,288 Word By 32 Bit Cmos Accutek Dynamic Random Access Memory
Manufacturer
Accutek Microcircuit Corporation
Datasheet
1.AK532256.pdf
(2 pages)
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
DQ
with RAS
· 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
· Single 5 Volt Power Supply
· 512 Refresh Cycles, 8mSEC
· Available in Fast Page Mode and EDO
A
DQ
CAS
RAS
WE
PD
Vcc
Vss
NC
Leadless SIM: AK532512W
Leaded ZIP: AK532512Z
DESCRIPTION
FEATURES
PIN NOMENCLATURE
MODULE OPTIONS
0
2
- A
1
1
to DQ
0
0
- PD
- DQ
8
- CAS
- RAS
MICROCIRCUIT CORPORATION
3
ACCUTEK
4
.
32
18
3
3
and alternately strobing RAS
Address Inputs
Data In/Data Out
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
o
C to 70
0
o
C
with RAS
Presence Detect -
PIN ASSIGNMENT
PIN #
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
PD1
PD2
PD3
PD4
1
1
and RAS
to DQ
SYMBOL
DQ17
DQ18
DQ19
DQ20
Vss
DQ2
DQ3
DQ4
-60
NC
NC
NC
Vss
Vcc
NC
D1
A0
A1
A2
A3
A4
A5
A6
17
2
,
Vss
Vss
-70
NC
NC
· Power
· Available in leadless SIM or leaded Zip versions
· Downward compatible with AK532256
· Upward compatible with AK5321024, AK5322048, AK5324096
· 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 #
ADDITIONAL OPTIONS AVAILABLE
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
4.00 Watt Max Active (60nS)
3.56 Watt Max Active (70 nS)
3.124 Watt Max Active (80 nS)
88 mW Max Standby
and AK5328192
+
+
1
Vss
Vss
-80
NC
NC
SYMBOL
DQ21
DQ22
DQ23
DQ24
RAS3
RAS2
DQ5
DQ6
DQ7
DQ8
Dynamic Random Access Memory
Vcc
NC
NC
NC
NC
NC
A7
A8
524,288 Word by 32 Bit CMOS
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
SYMBOL
CAS0
CAS2
CAS3
CAS1
RAS0
RAS1
DQ25
DQ10
DQ26
DQ11
DQ27
DQ9
Vss
WE
NC
NC
NC
NC
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
AK532512W
SYMBOL
DQ12
DQ28
DQ13
DQ29
DQ30
DQ14
DQ31
DQ15
DQ32
DQ16
PD1
PD2
PD3
PD4
Vcc
Vss
NC
NC
72
+
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ak532256 Summary of contents
Page 1
... Available in leadless SIM or leaded Zip versions · Downward compatible with AK532256 · Upward compatible with AK5321024, AK5322048, AK5324096 and AK5328192 ADDITIONAL OPTIONS AVAILABLE · 256K x 32 version, AK532256 o · 1 Meg x 32 version, AK5321024 C · 2 Meg x 32 version, AK5322048 · 4 Meg x 32 version, AK5324096 · ...
Page 2
FUNCTIONAL DIAGRAM MECHANICAL DIMENSIONS 1.000" MAX + + 0.425" 0.375" 0.250" ACCUTEK 5 NEW PASTURE ROAD NEWBURYPORT, MA 01950-4040 PHONE: 978-465-6200 Email: MICROCIRCUIT CORPORATION Internet: www.accutekmicro.com 4.250" 3.985" 1 0.125" 0.080" Accutek reserves the right to ...