AK532512W_09 Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – Dynamic Random Access Memory

ACCUTEK
MICROCIRCUIT CORPORATION
AK532512W
524,288 Word by 32 Bit CMOS
Dynamic Random Access Memory
DESCRIPTION
The Accutek AK532512W high density memory module is a CMOS
dynamic RAM organized in 512K x 32 bit words. The module con-
sists of sixteen standard 256K x 4 DRAMs in plastic SOJ packages.
The assembly has eight drams mounted on each 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-
1
72
ditional memory are important.
The operation of the AK532512W is identical to sixteen 256K x 4
Drams. There are four CAS lines and four RAS lines. On each bank
of 256K x 32, independent byte control is accomplished by the four
CAS lines. Each seperate CAS line controls four 256K x 4 Drams.
Two banks of 32 bits are controlled by the two pairs of RAS lines. A
sixteen bit data path can be produced by connecting DQ₁ to DQ₁₇,
DQ₂ to DQ₁₈ and alternately strobing RAS₀ with RAS₁ and RAS₂
with RAS₃.
· Power
4.00 Watt Max Active (60nS)
3.56 Watt Max Active (70 nS)
3.124 Watt Max Active (80 nS)
88 mW Max Standby
· Available in leadless SIM or leaded Zip versions
FEATURES
· Downward compatible with AK532256
· 524,288 x 32 bit organization
· 72 pin Single In-Line Module
· Upward compatible with AK5321024, AK5322048, AK5324096
and AK5328192
· Multiple CAS and RAS lines allow x16 or x32 bit widths
ADDITIONAL OPTIONS AVAILABLE
· CAS-before-RAS Refresh, RAS-only Refresh or Hidden refresh
· Operating free air temperature 0^oC to 70^oC
· Single 5 Volt Power Supply
· 512 Refresh Cycles, 8mSEC
· Available in Fast Page Mode and EDO
· 256K x 32 version, AK532256
· 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 NOMENCLATURE
PIN ASSIGNMENT
A0 - A8
DQ1 - DQ32
CAS0 - CAS3
RAS0 - RAS3
WE
PD1 - PD4
Vcc
Vss
NC
Address Inputs
Data In/Data Out
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
MODULE OPTIONS
Leadless SIM: AK532512W
Leaded ZIP: AK532512Z
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SYMBOL
Vss
D1
DQ17
DQ2
DQ18
DQ3
DQ19
DQ4
DQ20
Vcc
NC
A0
A1
A2
A3
A4
A5
A6
Presence Detect -
-60
PD1
NC
PD2
Vss
PD3
NC
PD4
NC
PIN #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
-70
NC
Vss
Vss
NC
SYMBOL
NC
DQ5
DQ21
DQ6
DQ22
DQ7
DQ23
DQ8
DQ24
A7
NC
Vcc
A8
NC
RAS3
RAS2
NC
NC
-80
NC
Vss
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
RAS1
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