Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK63264A SRAM Module consists of fast high
performance SRAMs mounted on a low height, 64 pin SIM or ZIP
Board. The module utilizes four 32 pin 64K x 8 SRAMs in 300 mil
SOJ packages and four decoupling capacitors mounted on the front
side of a printed circuit board.
The SRAMs used have common I/O functions and single output en-
able functions. Also, four separate chip select (CE) connections are
used to independently enable the four bytes. The modules can be
supplied in a variety of access time values from 12nSEC to 35nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.600 inch to provide for the lowest height off the board. Each
conforms to JEDEC-standard sizes and pin-out configurations.
Using two pins for module density identification, PD
0
and PD
1
, mini-
mizes interchangeability and design considerations when changing
from one module size to the other in customer applications.
AK63264AW
65,536 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
Front View
1
32
33
64
·
Upward compatible with 128K x 32 (AK632128), 256K x 32
(AK632256),512K x 32 ( AK632512) and 1 Meg x 32
(AK6321024)
·
TTL-compatible inputs and outputs
·
Single 5 volt power supply - AK63264AW
·
Single 3.3 volt power supply - AK63264AW/3.3
·
Operating temperature range in free air, 0
0
to 70
0
C
FEATURES
·
65,536 x 32 bit organization
·
JEDEC Standard 64 pin SIM or ZIP format
·
Common I/O, single OE fucntions with four separate chip se-
lects (CE)
·
Low height, 0.600 inch maximum
·
Presence Detect, PD
0
and PD
1
for identifying module density
·
Downard compatible with 32K x 32 (AK63232W)
·
Fast access to,es frp, 12nSEC
ELECTRICAL SPECIFICATIONS
Timing Diagrams and basic electrical characteristics are those of
the standard 64K x 8 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 64K x 8 SRAMs from several semiconductor manu-
facturers.
PIN NOMENCLATURE
A
0
- A
15
CE
1
- CE
4
DQ
1
- DQ
32
OE
PD
0
- PD
1
Vcc
Vss
WE
NC
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
Power Supply
Ground
Write Enable
No Connect
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
FUNCTIONAL DIAGRAM
CE4
CE3
NC
NC
OE
Vss
DQ25
DQ17
DQ26
DQ18
DQ27
DQ19
DQ28
DQ20
A3
A10
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
A4
A11
A5
A12
Vcc
A13
A6
DQ21
DQ29
DQ22
DQ30
DQ23
DQ31
DQ24
DQ32
Vss
1
2
3
4
5
6
7
8
9
10
11
12
Vss
PD0
PD1
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
DQ4
DQ12
Vcc
A0
A7
A1
A8
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A2
A9
DQ13
DQ5
DQ14
DQ6
DQ15
DQ7
DQ16
DQ8
Vss
WE
A15
A14
CE2
CE1
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MODULE OPTIONS
Leadless SIM: AK63264AW
13
14
15
16
PD
0
= Open
PD
1
= Vss
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position
1
2
Product
AK = Accutek Memory
Type
4 = Dynamic RAM
5 = CMOS Dynamic RAM
6 = Static RAM
Organization/Word Width
1 = by 1 16 = by 16
4 = by 4 32 = by 32
8 = by 8 36 = by 36
9 = by 9
Size/Bits Depth
64 = 64K
4096 = 4 MEG
256 = 256K
8192 = 8 MEG
1024 = 1 MEG 16384 = 16
MEG
Package Type
G = Single In-Line Package (SIP)
S = Single In-Line Module (SIM)
D = Dual In-Line Package (DIP)
W = .050 inch Pitch Edge Connect
Z = Zig-Zag In-Line Package (ZIP)
Special Designation
P = Page Mode
N = Nibble Mode
K = Static Column Mode
W = Write Per Bit Mode
V = Video Ram
Separator
- = Commercial 0
0
C to +70
0
C
M = Military Equivalent Screened
(-55
0
C to +125
0
C)
I = Industrial Temperature Tested
(-45
0
C to +85
0
C)
X = Burned In
Speed (first two significant digits)
DRAMS
SRAMS
50 = 50 nS
8 =
8 nS
60 = 60 nS
10 = 10 nS
70 = 70 nS
12 = 12 nS
80 = 80 nS
15 = 15 nS
1
2
3
4
5
6
7
8
MECHANICAL DIMENSIONS
Inches
0.600
MAX
0.425
0.375
3
0.250
4
0.090
0.070
5
CC
L L
6
0.050
TYP
3.840
3.860
CC
L L
7
.130
.120
8
The numbers and coding on this page do not include all variations
available but are show as examples of the most widely used variations.
Contact Accutek if other information is required.
EXAMPLES:
AK63264AW-12
64K x 32, 12 nSEC, SRAM Module, SIM Configuration, Low Height
0.200
MAX
.053
.047
ACCUTEK MICROCIRCUIT CORPORATION
BUSINESS CENTER at NEWBURYPORT
2 NEW PASTURE ROAD, SUITE 1
NEWBURYPORT, MA 01950-4054
Phone:
978-465-6200 FAX: 978-462-3396
Email:
sales@accutekmicro.com
Internet: www.accutekmicro.com
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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