Download datasheet for AK536512W by Accutek Microcircuit Corporation

Download datasheet for AK536512W by Accutek Microcircuit Corporation
AK536512W
524,288 Word by 36 Bit CMOS
Dynamic Random Access Memory
ACCUTEK
MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK536512W high density memory module is a CMOS
dynamic RAM organized in 512K x 36 bit words. The module consists of sixteen standard 256K x 4 DRAMs in plastic SOJ packages
and eight 256K x 1 DRAMs in PLCC packages. The assembly has
12 drams mounted on each side of a printed circuit board in a 72 pad
leadless SIM configuration.
+
+
1
72
This configuration allows socket-mounting of large quantities of
memory in applications where high density and ease of inserting additional memory are important.
The operation of the AK536512 is identical to sixteen 256K x 4 plus
eight 256K x 1 DRAMs. There are four CAS lines and four RAS
lines. On each bank of 256K x 36, independent byte control is accomplished by four CAS lines. Each separate CAS line controls four
256K x 4 DRAMs and two 256K x 1 DRAMs with data in tied to data
out to form a 9 bit byte. Two banks of 36 bits are controlled by the
two pairs of RAS lines. An eighteen bit data path can be produced
by connecting DQ0 to DQ18, DQ1 to DQ19, etc. and alternately
strobing RAS0 with RAS1 and RAS2 with RAS3.
FEATURES
·
·
·
·
·
524,288 x 36 bit organization
72 pad Single In-Line Module
Multiple CAS and RAS lines allow x18 or x36 bit widths
CAS-before-RAS refresh
Operating free air temperature 0oC to 70oC
· Single 5 Volt Power Supply
· Power
5.41 Watt Max Active (70nS)
4.75 Watt Max Active (80 nS)
4.09 Watt Max Active (100 nS)
132 mW Max Standby
· 512 Refresh Cycles, 8 mSEC
· Available in Fast Page Mode and Static Column Mode versions
· Downward compatible with AK536256W
· Upward compatible with AK5361024W, AK5362048W,
AK5364096W and AK5368192W
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ0 - DQ35
Data In/Data Out
A0 - A8
Address Inputs
PIN #
1
CAS0 - CAS3
Column Address Strobe
RAS0 - RAS3
Row Address Strobe
4
DQ1
22
DQ5
WE
Write Enable
5
DQ19
23
DQ23
PD
Presence Detect
6
DQ2
24
DQ6
Vcc
5v Supply
7
DQ20
25
8
DQ3
26
Vss
Ground
9
DQ21
NC
No Connect
10
Vcc
11
NC
29
12
A0
30
13
A1
31
A8
14
A2
32
NC
50
DQ27
68
PD2
15
A3
33
RAS3
51
DQ10
69
PD3
16
A4
34
RAS2
52
DQ28
70
PD4
17
A5
35
DQ26
53
DQ11
71
NC
18
A6
36
DQ8
54
DQ29
72
Vss
MODULE OPTIONS
Leadless SIM: AK536512W
Leaded ZIP: AK536512Z
SYMBOL
Vss
PIN #
19
SYMBOL
NC
PIN #
37
SYMBOL
DQ17
PIN #
55
SYMBOL
DQ12
2
DQ0
20
DQ4
38
DQ35
56
DQ30
3
DQ18
21
DQ22
39
Vss
57
DQ13
40
CAS0
58
DQ31
41
CAS2
59
Vcc
42
CAS3
60
DQ32
DQ24
43
CAS1
61
DQ14
DQ7
44
RAS0
62
DQ33
27
DQ25
45
RAS1
63
DQ15
28
A7
46
NC
64
DQ34
NC
47
WE
65
DQ16
Vcc
48
NC
66
NC
49
DQ9
67
PD1
Presence Detect PD1
-60
NC
-70
NC
-80
NC
PD2
Vss
Vss
Vss
PD3
NC
Vss
NC
PD4
NC
NC
Vss
FUNCTIONAL DIAGRAM
MECHANICAL DIMENSIONS
4.240"
4.260"
0.330"
MAX
3.979"
3.989"
1.000"
MAX
0.425"
0.375"
+
+
0.250"
1
72
0.080"
ACCUTEK
MICROCIRCUIT CORPORATION
0.050"
TYP
0.125"
CL CL
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
PHONE: 978-465-6200 FAX: 978-462-3396
Email: [email protected]
Internet: www.accutekmicro.com
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.
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