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
ACCUTEK [ ACCUTEK MICROCIRCUIT CORPORATION ]
