DESCRIPTION
The Accutek AK68512D1C high density memory module is a static
random access memory organized in 512K x 8 bit words. The as-
sembly consists of one medium speed 512K x 8 SRAM in a TSOP
Type 2 package. The module is supplied in a 600 mil wide, 32 pin
DIP (Dual In-Line Package) configuration. This pinout is completely
compatible with industry standard monolithic designs. These mod-
ules are intended for use in applications where limited board space
dictates compact module designs.
The operation of the AK68512D1C is identical to standard mono-
lithic 8 bit word wide SRAMs.
The AK68512D1C offers the features of low power and medium
speed by using CMOS devices and makes high density mounting
possible with no surface mount technology.
FEATURES
·524,288 x 8 bit organization
·Fast access time: 55 - 70 nSEC
·Completely static RAM, no clock or timing strobe required
·Inputs and outputs TTL compatible
·Conventional 600 mil wide SIP package with industry
compatible pinout
·Single 5 volt power supply - AK68512D1C
·Single 3.3 volt power supply - AK68512D1C/3.3
·Operating free air temperature 00to 700C
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 512K x 8 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 512K x 8 SRAMs from any of a number of semicon-
ductor manufacturers.
ACCUTEK
MICROCIRCUIT CORPORATION
AK68512D1C
524,288 x 8 Bit CMOS
Static Random Access Memory
PIN NOMENCLATURE
DQ1-DQ
8Data In/Data Out
A0-A
18 Adress Inputs
CE Chip Enable
WE Write Enable
Vcc 5v Supply
Vss Ground
OE Output Enable
TIMING OPTIONS
55 nSEC Access Time
70 nSEC Access Time
PIN ASSIGNMENT FUNCTIONAL DIAGRAM
A
A
A
A
A
A
A
A
A
A
A
A
DQ
DQ
DQ
V
18
16
14
12
7
6
5
4
3
2
1
0
1
2
3
SS
V
A
A
WE
A
A
A
A
OE
A
CE
DQ
DQ
DQ
DQ
DQ
CC
15
17
13
8
9
11
10
8
7
6
5
4
Top View
1
32 PIN SOIC
A18
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ1
DQ2
DQ3
Vss
Vcc
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ8
DQ7
DQ6
DQ5
DQ4
0.22uF CAPACITOR
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 12 = 12 nS
70 = 70 nS 55 = 55 nS
80 = 80 nS 70 = 70 nS
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 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 avail-
able but are show as examples of the most widely used variations.
Contact Accutek if other information is required.
EXAMPLES:
AK68512D1C-70
512K x 8, 70 nSEC SRAM Module, DIP Configuration
0.245"
0.900"
32 PIN
TYPE 2
TSOP
0.550" 0.600"
1.600"
0.700"
0.100" 0.125"
0.130"
