DESCRIPTION
The Accutek AK632128W SRAM Module consists of fast high per-
formance SRAMs mounted on a low height, 64 pin SIM or ZIP PCB.
The module utilizes four 32 pin 128K 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 7nSEC to 35nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.600 inch SIM or 0.520 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,
PD0and PD1, minimizes interchangeability and design consider-
ations when changing from one module size to the other in cus-
tomer applications.
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, 0.600 inch MAX seated height SIM Version
·Very low profile, 0.520 inch MAX seated height ZIP Version
·Single +5 Volt (10%) power supply
·Common I/O, single OE functions with four separate chip se-
lects (CE)
·Presence Detect PD0and PD1for 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 00to 700C
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.
A
ccute
k
Microcircuit
Corporation
AK632128AW / AK632128AZ
131,072 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
132 33 64
132 33 64
Top View
64-Pin SIMM
64-Pin ZIP
PIN NOMENCLATURE
A0-A
16 Address Inputs
CE1-CE
4Chip Enable
DQ1-DQ
32 Data In/Data Out
OE Output Enable
PD0-PD
1Presence Detect
Vcc 5v Supply
Vss Ground
WE Write Enable
NC No Connect
MODULE OPTIONS
Leadless SIM: AK632128AW
Leaded ZIP: AK632128AZ
PIN ASSIGNMENT
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
1 Vss 17 A2 33 CE449 A4
2 PD0 18 A9 34 CE3 50 A11
3 PD1 19 DQ13 35 NC 51 A5
4 DQ1 20 DQ5 36 A16 52 A12
5 DQ9 21 DQ14 37 OE 53 Vcc
6 DQ2 22 DQ6 38 Vss 54 A13
7 DQ10 23 DQ15 39 DQ25 55 A6
8 DQ3 24 DQ7 40 DQ17 56 DQ21
9 DQ11 25 DQ16 41 DQ26 57 DQ29
10 DQ4 26 DQ8 42 DQ18 58 DQ22
11 DQ12 27 Vss 43 DQ27 59 DQ30
12 Vcc 28 WE 44 DQ19 60 DQ23
13 A0 29 A15 45 DQ28 61 DQ31
14 A7 30 A14 46 DQ20 62 DQ24
15 A1 31 CE2 47 A3 63 DQ32
16 A8 32 CE1 48 A10 64 Vss
PD0= Open
PD1= Open
FUNCTIONAL DIAGRAM
A0-A16
A0-A16
A0-A16
A0-A16
WE
WE
WE
WE
DQ1 - DQ8
DQ1 - DQ8
DQ1 - DQ8
DQ1 - DQ8
OE
OE
OE
OE
CE
CE
CE
CE
+
+
+
+
DQ1 - DQ8
DQ9 - DQ16
DQ17 - DQ24
DQ25 - DQ32
+
A0-A16 17
+*
*
*
*
+*
*
*
*
+
+
+
+
*
*
*
*
WE
OE
CE1
CE2
CE3
CE4
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position 12345678
1 Product
AK = Accutek Memory
2 Type
4 = Dynamic RAM
5 = CMOS Dynamic RAM
6 = Static RAM
3 Organization/Word Width
1 = by 1 16 = by 16
4 = by 4 32 = by 32
8 = by 8 36 = by 36
9 = by 9
4 Size/Bits Depth
64 = 64K 4096 = 4 MEG
256 = 256K 8192 = 8 MEG
1024 = 1 MEG 16384 = 16 MEG
5 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)
6 Special Designation
P = Page Mode
N = Nibble Mode
K = Static Column Mode
W = Write Per Bit Mode
V = Video Ram
7 Separator
- = Commercial 00Cto+70
0C
M = Military Equivalent Screened
(-550C to +1250C)
I = Industrial Temperature Tested
(-450Cto+85
0C)
X = Burned In
8 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
3.590
3.610
0.125
0.135 0.050
TYP
C
LC
L
C
L
1
0.520
MAX
0.125
0.155 C
L
C
L
0.200
MAX
0.100
TYP
0.100
TYP
C
L
C
L
64
.100 x .100
ANGLE NOTCH
0.600
MAX
3.840
3.860
0.090
0.070
0.050
TYP
C
L
C
L
1
0.250
0.200
MAX
0.425
0.375
.053
.047
C
LC
L
.130
.120
135
24664
6260
63
61
59
Top View ZIP
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: accutek@seacoast.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.
MECHANICAL DIMENSIONS
Inches
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:
AK632128AW-10
128K x 32, 15 nSEC SRAM Module, SIM Configuration
AK632128AZ-12
128K x 32, 12 nSEC SRAM Module, ZIP Configuration
