AK532256AW - Accutek Microcircuit Corporation

AK532256AW
262,144 Word by 32 Bit CMOS
Dynamic Random Access Memory
ACCUTEK
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 packages. 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 additional memory are important.
72
1
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.
FEATURES
· 262,144 x 32 bit organization
· 72 pad Single In-Line Module
· Available in Fast Page Mode or EDO
· CAS-before-RAS, RAS-only or hidden refresh
· Upward compatible with AK532512W, AK5321024W,
AK5322048W, AK5324096W and AK5328192W
· Operating free air temperature 0oC to 70oC
· Single 5 Volt Power Supply
ADDITIONAL OPTIONS AVAILABLE
· 1024 Refresh Cycles, 16 mSEC
· 256K x 36 version, AK536256W
· Available in Fast Page Mode
· 512K x 32 version, AK532512W
· 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
· 512K x 36 version, AK536512W
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ0 - DQ31
Data In/Data Out
A0 - A8
Address Inputs
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: AK532256AW
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
Presence Detect -
Leaded ZIP: AK532256AZ
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
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
DQ24
DQ25
+ DQ26
+ DQ27
+ DQ28
+ DQ29
+ DQ30
+ DQ31
+
+
UCAS
CAS3 +
WE
LCAS
CAS2 +
OE
RAS
RAS2 +
DQ8
DQ7
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
+
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
A0 - A8
WE
+
WE
UCAS
CAS1 +
OE
LCAS
CAS0 +
+
DQ8
DQ7
+ DQ10
+ DQ11
+ DQ12
+ DQ13
+ DQ14
+ DQ15
+
RAS
RAS0 +
DQ8
DQ7
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
+
DQ0
DQ1
+ DQ2
+ DQ3
+ DQ4
+ DQ5
+ DQ6
+ DQ7
+
+
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
A0 - A8
A0 - A8 +
DQ16
DQ17
+ DQ18
+ DQ19
+ DQ20
+ DQ21
+ DQ22
+ DQ23
FUNCTIONAL DIAGRAM
MECHANICAL DIMENSIONS
4.250"
3.985"
+
+
0.700"
MAX
0.425"
0.375"
0.250"
72
72
1
0.080"
ACCUTEK
MICROCIRCUIT CORPORATION
0.200"
MAX
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
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.