ak532256w Accutek Microcircuit Corporation, ak532256w Datasheet
ak532256w
Manufacturer Part Number
ak532256w
Description
262,144 Word By 32 Bit Cmos Accutek Dynamic Random Access Memory
Manufacturer
Accutek Microcircuit Corporation
Datasheet
1.AK532256W.pdf
(2 pages)
The Accutek AK532256W high density memory module is a CMOS
dynamic RAM organized in 256K x 32 bit words. The module con-
sists 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 DQ
nately strobing RAS
· 262,144 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
· Power
A
DQ
CAS
RAS
WE
PD
Vcc
Vss
NC
Leadless SIM: AK532256W
Leaded ZIP: AK532256WZ
DESCRIPTION
FEATURES
PIN NOMENCLATURE
MODULE OPTIONS
0
2.00 Watt Max Active (60nS)
1.78 Watt Max Active (70 nS)
1.562 Watt Max Active (80 nS)
44 mW Max Standby
- A
1
1
0
0
- PD
- DQ
, RAS
8
- CAS
MICROCIRCUIT CORPORATION
ACCUTEK
4
32
2
3
Address Inputs
Data In/Data Out
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
0
with RAS
2
1
.
to DQ
o
C to 70
17
, DQ
o
C
2
Presence Detect -
to DQ
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
18
and alter-
SYMBOL
DQ17
DQ18
DQ19
DQ20
Vss
DQ2
DQ3
DQ4
-60
NC
NC
NC
Vss
Vcc
NC
D1
A0
A1
A2
A3
A4
A5
A6
Vss
Vss
-70
NC
NC
· Available in Fast Page Mode, EDO and Static Column Mode
· Available in leadless SIM or leaded Zip versions
· Upward compatible with AK532512, AK5321024, AK5322048,
· 512K x 32 version, AK532512
· 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
versions
AK5324096 and AK5328192
+
+
1
Vss
Vss
-80
NC
NC
SYMBOL
DQ21
DQ22
DQ23
DQ24
RAS2
DQ5
DQ6
DQ7
DQ8
Dynamic Random Access Memory
Vcc
NC
NC
NC
NC
NC
NC
A7
A8
262,144 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
DQ25
DQ10
DQ26
DQ11
DQ27
DQ9
Vss
WE
NC
NC
NC
NC
NC
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
AK532256W
SYMBOL
DQ12
DQ28
DQ13
DQ29
DQ30
DQ14
DQ31
DQ15
DQ32
DQ16
PD1
PD2
PD3
PD4
Vcc
Vss
NC
NC
72
+
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ak532256w Summary of contents
Page 1
... The assembly has eight drams mounted on the front side of a printed circuit board 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 ...
Page 2
FUNCTIONAL DIAGRAM MECHANICAL DIMENSIONS 1.000" MAX + + 0.425" 0.375" 0.250" 1 ACCUTEK 5 NEW PASTURE ROAD NEWBURYPORT, MA 01950-4040 PHONE: 978-465-6200 Email: MICROCIRCUIT CORPORATION Internet: www.accutekmicro.com 4.250" 3.985" 0.125" 0.080" Accutek reserves the right to ...