Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK632128 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low height, 64 pin SIM or ZIP PCB.
The module utilizes four 32 pin 128K x 8 SRAMs in 400 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 7nSEC to 35nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.620 inch SIM or 0.540 inch ZIP to provide for the lowest height
off the board. Each conforms to JEDEC-standard sizes and pin-out
configurations. Using two pins for module denisty identification,
PD
0
and PD
1
, minimizes interchangeability and design consider-
ations when changing from one module size to the other in cus-
tomer applications.
AK632128W / AK632128Z
131,072 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
Top View
64-Pin SIMM
64-Pin ZIP
·
Common I/O, single OE functions with four separate chip se-
lects (CE)
·
Presence Detect PD
0
and PD
1
for identifying module density
·
Downward compatible with 32K x 32 (AK63232) and 64K x 32
AK63264)
·
Upward compatible with 256K x 32 (AK632256), 512K x 32
(AK632512) and 1 Meg x 32 (AK6321024)
·
Operating free air temperature 0
0
to 70
0
C
FEATURES
·
131,072 x 32 bit organization
·
JEDEC Standard 64 pin SIM or ZIP format
·
Access times as fast as 7nSEC
·
TTL compatible inputs and outputs
·
Very low profile, 0.620 inch MAX seated height SIM Version
·
Very low profile, 0.540 inch MAX seated height ZIP Version
·
Single +5 Volt (10%) power supply
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 128K x 8 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 128K x 8 SRAMs from at least seven semiconductor
manufacturers.
PIN NOMENCLATURE
A
0
- A
16
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
5v Supply
Ground
Write Enable
No Connect
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
FUNCTIONAL DIAGRAM
CE4
CE3
NC
A16
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
CE
CE1 +
A0 - A16
* WE
DQ1 - DQ8
+ DQ9 - DQ16
* OE
A0 - A16 +
WE +
OE +
17
A0 - A16
* WE
DQ1 - DQ8
+ DQ1 - DQ8
* OE
CE
1
2
3
4
5
6
7
8
9
10
11
12
13
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
DQ22
DQ30
DQ23
DQ31
DQ24
CE2 +
A0 - A16
* WE
DQ1 - DQ8
* OE
CE
+ DQ17 - DQ24
MODULE OPTIONS
Leadless SIM: AK632128W
Leaded ZIP: AK632128Z
14
15
16
DQ32
Vss
CE3 +
A0 - A16
* WE
DQ1 - DQ8
* OE
CE
CE4 +
+ DQ25 - DQ32
PD
0
= Open
PD
1
= Open
*
*
*
*
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
10 = 10 nS
80 = 80 nS
12 = 12 nS
10 = 100 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
64
63
0.620
MAX
0.425
0.375
4
.100 x .100
ANGLE NOTCH
0.125
0.155
0.250
5
0.540
MAX
1
0.090
0.070
C
L
1
6
0.125
0.135
CC
LL
CC
LL
7
0.050
TYP
0.050
TYP
3.590
3.610
C C
L L
3.840
3.860
.130
.120
C C
L L
8
0.100
TYP
The numbers and coding on this page do not include all variations
available but are shown as examples of the most widely used
variations. Contact Accutek if other information is required.
64
EXAMPLES
AK632128W-15
128K x 32, 15 nSEC SRAM Module, SIM Configuration
AK632128Z-20
128K x 32, 20 nSEC SRAM Module, ZIP Configuration
ACCUTEK MICROCIRCUIT CORPORATION
BUSINESS CENTER at NEWBURYPORT
2 NEW PASTURE ROAD, SUITE 1
NEWBURYPORT, MA 01950-4054
VOICE: 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.
0.100
TYP
C C
L L
0.200
MAX
.053
.047
0.200
MAX
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