MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK532256AW high density memory module is a
CMOS dynamic RAM organized in 265K x 32 bit words. The module
consists of two standard 256K x 16 bits DRAMs in plastic SOJ pack-
ages. The assembly has 2 DRAMs mounted on the front 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 AK532256AW is identical to eight 256K x 4
Drams. There are four CAS lines and two RAS lines. On each bank
of 256K x 32, independent byte control is accomplished by four CAS
lines. Each seperate CAS line controls one byte of the 256K x 16
Dram.
ACCUTEK
AK532256AW
262,144 Word by 32 Bit CMOS
Dynamic Random Access Memory
+
+
1
72
FEATURES
·
262,144 x 32 bit organization
·
72 pad Single In-Line Module
·
CAS-before-RAS, RAS-only or hidden refresh
·
Operating free air temperature 0 C to 70 C
·
Single 5 Volt Power Supply
·
1024 Refresh Cycles, 16 mSEC
·
Available in Fast Page Mode
·
Power: 2.090 Watt Max Active (50 nS)
1.870 Watt Max Active (60 nS)
1.760 Watt Max Active (70 nS)
22 mW Max Standby
o
o
·
Available in Fast Page Mode or EDO
·
Upward compatible with AK532512W, AK5321024W,
AK5322048W, AK5324096W and AK5328192W
ADDITIONAL OPTIONS AVAILABLE
·
256K x 36 version, AK536256W
·
512K x 32 version, AK532512W
·
512K x 36 version, AK536512W
PIN NOMENCLATURE
DQ
0
- DQ
31
A
0
- A
8
CAS
0
- CAS
3
RAS
0
, RAS
2
WE
PD
1
- PD
4
Vcc
Vss
NC
Data In/Data Out
Address Inputs
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
DQ0
DQ16
DQ1
DDQ17
DQ2
DQ18
DQ3
DQ19
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
DQ4
DQ20
DQ5
DQ21
DQ6
DQ22
DQ7
DQ23
A7
NC
Vcc
A8
NC
NC
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
NC
NC
WE
NC
DQ8
DQ24
DQ9
DQ25
DQ10
DQ26
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
SYMBOL
DQ11
DQ27
DQ12
DQ28
Vcc
DQ29
DQ13
DQ30
DQ14
DQ31
DQ15
NC
PD1
PD2
PD3
PD4
NC
Vss
MODULE OPTIONS
Leadless SIM: AK532256AW
Leaded ZIP: AK532256AZ
Presence Detect -
PD1
PD2
PD3
PD4
-60
Vss
NC
NC
NC
-70
Vss
NC
Vss
NC
-80
Vss
NC
NC
Vss
FUNCTIONAL DIAGRAM
DQ16
DQ17
+
DQ18
+
DQ19
+
DQ20
+
DQ21
+
DQ22
+
DQ23
+
+
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ7
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
A0 - A8
LCAS
RAS
A0 - A8
UCAS
UCAS
LCAS
RAS
WE
RAS
0
+
CAS
0
+
CAS
1
+
RAS
2
+
CAS
2
+
A
0
- A
8 +
MECHANICAL DIMENSIONS
4.250"
3.985"
CAS
3
+
WE
+
+
72
+
0.700"
MAX
0.425"
0.375"
0.250"
1
72
0.080"
0.125"
CC
LL
CC
L L
0.050"
TYP
MICROCIRCUIT CORPORATION
ACCUTEK
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
PHONE: 978-465-6200 FAX: 978-462-3396
Email: sales@accutekmicro.com
Internet: www.accutekmicro.com
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. Pre-
liminary data sheets contain minimum and maximum limits based upon
design objectives, which are subject to change upon full characterization
over the specific operating conditions.
WE
0.200"
MAX
OE
OE
DQ8
DQ7
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ24
DQ25
+
DQ26
+
DQ27
+
DQ28
+
DQ29
+
DQ30
+
DQ31
+
DQ8
DQ7
+
DQ10
+
DQ11
+
DQ12
+
DQ13
+
DQ14
+
DQ15
+
DQ0
DQ1
+
DQ2
+
DQ3
+
DQ4
+
DQ5
+
DQ6
+
DQ7
+
+
+
+
Microcontroller MCU
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EEWORLD
