MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK63264 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low profile, 64 pin SIM or ZIP Board.
The module utilizes eight 28 pin 64K x 4 SRAMs in SOJ packages
and four decoupling capacitors on each 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 12 nSEC to
45 nSEC in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.600 inch SIM or 0.500 inch ZIP to provide for the lowest height
off the board. By offset-mounting the back surface SRAMs on the
SIM version the module can be mounted in either angled or
straight-up SIM sockets. Each conforms to JEDEC - standard sizes
and pin-out configurations. Using two pins for module memory den-
sity identification, PD
0
and PD
1
, minimizes interchangeability and
design considerations when changing from one module size to the
other in customer applications.
1
ACCUTEK
AK63264W/AK63264Z
65,536 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
Front View
64-Pin SIM
+
+
1
32
33
64
64-Pin ZIP
32
33
64
·
Presence Detect, PD
0
and PD
1
for identifying module density
·
Fast Access Times range from 12 nSEC BiCMOS to 45 nSEC
CMOS
·
TTL-compatible inputs and outputs
·
Single 5 volt power supply - AK63264W, AK63264Z
·
Single 3.3 volt power supply - AK63264W/3.3, AK63264Z/3.3
·
Operating temperature range in free air, 0
0
C to 70
0
C
FEATURES
·
65,536 x 32 bit organization
·
JEDEC Standard 64 pin SIM or ZIP format
·
Common I/O, single OE functions with four separate chip
selects (CE)
·
Low height, 0.600 inch SIM or 0.500 inch ZIP maximum
·
Upward compatible with 128K x 32 (AK632128), 256K x 32
(AK632256) and 1 Meg x 32 (AK6321024) designs
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 64K x 4 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 64K x 4 SRAMs from at least seven semiconductor
manufacturers.
PIN NOMENCLATURE
A
0
- A
15
CE
1
- CE
4
DQ
1
- DQ
32
OE
PD
0
- PD
1
Vcc
Vss
WE
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
Power Supply
Ground
Write Enable
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
FUNCTIONAL DIAGRAM
CE
4
CE
3
NC
NC
OE
Vss
DQ
25
DQ
17
DQ
26
DQ
18
DQ
27
DQ
19
DQ
28
DQ
20
A
3
A
10
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
A
4
A
11
A
5
A
12
Vcc
A
13
A
6
DQ
21
DQ
29
DQ
22
DQ
30
DQ
23
DQ
31
DQ
24
DQ
32
Vss
1
2
3
4
5
6
7
8
9
10
11
Vss
PD
0
PD
1
DQ
1
DQ
9
DQ
2
DQ
10
DQ
3
DQ
11
DQ
4
DQ
12
Vcc
A
0
A
7
A
1
A
8
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A
2
A
9
DQ
13
DQ
5
DQ
14
DQ
6
DQ
15
DQ
7
DQ
16
DQ
8
Vss
WE
A
15
A
14
CE
2
CE
1
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MODULE OPTIONS
Leadless SIM:
Leaded SIP:
Leaded ZIP:
AK63264W
AK63264G
AK63264Z
12
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
60 = 60 nS
8 = 8 nS
70 = 70 nS
12 = 12 nS
80 = 80 nS
15 = 15 nS
1
2
3
4
5
6
7
8
MECHANICAL DIMENSIONS
Inches
Top View ZIP
1
2
3
4
5
6
3
59
60
61
62
4
63
64
0.600
MAX
.050 x .050
ANGLE NOTCH
0.125
0.155
.250
5
0.500
MAX
1
+
1
C
L
0.120
0.130
0.090
0.070
6
0.050
TYP
CC
LL
CC
LL
0.050
TYP
7
3.840
3.860
3.585
3.590
3.610
C C
L L
0.125
TYP
C C
L L
0.100
TYP
8
+
64
64
The numbers and coding on this page do not include all variations
available but are shown as examples of the most widely used
ariations. Contact Accutek if other information is required.
0.100
TYP
C C
L L
EXAMPLES:
AK63264W-15
64K x 32, 15 nSEC SRAM Module, SIM Configuration
AK63264Z-12
64K x 32, 12 nSEC SRAM Module, ZIP Configuration
0.350
MAX
MICROCIRCUIT CORPORATION
ACCUTEK
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
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 im-
plied. 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.
0.350
MAX
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