ACCUTEK AK532512

Accutek
Microcircuit
Corporation
AK532256W
262,144 Word by 32 Bit CMOS
Dynamic Random Access Memory
DESCRIPTION
The Accutek AK532256W high density memory module is a CMOS
dynamic RAM organized in 256K x 32 bit words. The module consists of eight standard 256K x 4 DRAMs in plastic SOJ packages.
The assembly has eight drams mounted on the front side of a
printed circuit board in a 72 pad leadless SIM configuration.
The operation of the AK532256W is identical to eight 256K x 4
DRAMs. There are four CAS lines and two RAS lines. Independent
byte control is accomplished by four CAS lines. Each seperate CAS
line controls two 256K x 4 Drams to form an 8 bit byte. The bank of
32 bits is controlled by the two RAS lines. A sixteen bit data path can
be produced by connecting DQ1 to DQ17, DQ2 to DQ18 and alternately strobing RAS0 with RAS2.
+
+
· Available in Fast Page Mode, EDO and Static Column Mode
versions
FEATURES
· Available in leadless SIM or leaded Zip versions
· 262,144 x 32 bit organization
· Upward compatible with AK532512, AK5321024, AK5322048,
AK5324096 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
o
o
ADDITIONAL OPTIONS AVAILABLE
· Operating free air temperature 0 C to 70 C
· 512K x 32 version, AK532512
· Single 5 Volt Power Supply
· 1 Meg x 32 version, AK5321024
· 512 Refresh Cycles, 8mSEC
· 2 Meg x 32 version, AK5322048
· Power
2.00 Watt Max Active (60nS)
1.78 Watt Max Active (70 nS)
1.562 Watt Max Active (80 nS)
44 mW Max Standby
· 4 Meg x 32 version, AK5324096
· 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, RAS2
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: AK532256W
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
NC
RAS2
NC
NC
Presence Detect -
Leaded ZIP: AK532256WZ
PD1
PD2
PD3
PD4
-60
Vss
NC
NC
NC
-70
Vss
NC
Vss
NC
-80
Vss
NC
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
NC
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
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ24 - DQ27
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ20 - DQ23
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ16 - DQ19
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ12 - DQ15
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ8 - DQ11
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ4 - DQ7
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ0 - DQ4
OE
OE
CAS3
OE
OE
RAS2
CAS2
OE
OE
CAS1
OE
OE
A0 - A8
RAS0
CAS0
WE
9
A0 - A8
RAS
CAS DQ0 - DQ3
WE
OE
DQ28 - DQ31
FUNCTIONAL DIAGRAM
MECHANICAL DIMENSIONS
4.250"
0.200"
MAX
3.985"
1.000"
MAX
0.425"
0.375"
+
+
0.250"
0.080"
ACCUTEK MICROCIRCUIT CORPORATION
BUSINESS CENTER at NEWBURYPORT
2 NEW PASTURE ROAD, SUITE 1
NEWBURYPORT, MA 01950-4054
PHONE:
978-465-6200
FAX:
978-462-3396
Email:
sales@accutekmicro.com
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.