AK536512W_09 Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – Dynamic Random Access Memory

ACCUTEK
MICROCIRCUIT CORPORATION
AK536512W
524,288 Word by 36 Bit CMOS
Dynamic Random Access Memory
DESCRIPTION
The Accutek AK536512W high density memory module is a CMOS
dynamic RAM organized in 512K x 36 bit words. The module con-
sists 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 ad-
ditional 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 ac-
complished 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 0^oC to 70^oC
· 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
A₀ - A₈
CAS₀ - CAS₃
RAS₀ - RAS₃
WE
PD
Vcc
Vss
NC
Data In/Data Out
Address Inputs
Column Address Strobe
Row Address Strobe
Write Enable
Presence Detect
5v Supply
Ground
No Connect
MODULE OPTIONS
Leadless SIM: AK536512W
Leaded ZIP: AK536512Z
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SYMBOL
Vss
DQ0
DQ18
DQ1
DQ19
DQ2
DQ20
DQ3
DQ21
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
DQ22
DQ5
DQ23
DQ6
DQ24
DQ7
DQ25
A7
NC
Vcc
A8
NC
RAS3
RAS2
DQ26
DQ8
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
SYMBOL
DQ17
DQ35
Vss
CAS0
CAS2
CAS3
CAS1
RAS0
RAS1
NC
WE
NC
DQ9
DQ27
DQ10
DQ28
DQ11
DQ29
PIN #
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
SYMBOL
DQ12
DQ30
DQ13
DQ31
Vcc
DQ32
DQ14
DQ33
DQ15
DQ34
DQ16
NC
PD1
PD2
PD3
PD4
NC
Vss
Presence Detect -
-60
-70
-80
PD1
NC
NC
NC
PD2
Vss
Vss
Vss
PD3
NC
Vss
NC
PD4
NC
NC
Vss