DESCRIPTION
Accutek
Microcircuit
Corporation
+
AK6321024W / AK6321024Z
1,048,576 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
Front View
72-Pin SIM
+
The Accutek AK631024 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low profile, 72 pin SIM or ZIP PCB.
The module utilizes four 32 pin 1 Meg x 4 SRAMs in 400 mil SOJ
packages and four decoupling capacitor chips mounted 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 15nSEC to 30nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.670 inch SIM or 0.550 inch ZIP to provide for the lowest height
off the board. Each conforms to JEDEC-standard sizes and pin-out
configurations. Using four pins for module memory density identifi-
cation, PC
0
, PD
1
, PD
2
and PD
3
minimizes interchangeability and
design considerations when changing from one module size to the
other in customer applications.
1
36
37
72
72-Pin ZIP
1
36
37
72
FEATURES
·
1,048,576 x 32 SRAM module in high density configuration
·
JEDEC Standardized 72 pin SIM format
·
Common I/O, single OE functions with four separate chip
selects (CE)
·
Low height, 0.670 inch SIM or 0.550 inch ZIP maximum
·
Presence Detect PD
0
through PC
3
for identifying module density
·
TTL compatible inputs and outputs
·
Single 5 volt power supply
·
Fast access times range from 15 nSEC BiCMOS to 25 nSEC
·
Power
170mA Active (15nS)
165mA Active (17nS)
160mA Active (20nS)
155mA Active (25nS)
10mA Standby
·
Downward pin compatible with 512K x 32 (AK632512) - 72 pin
SIM or ZIP, and 256K x 32 (AK632256), 128K x 32 (AK632128),
64K x 32 (AK63264) and 32K x 32 (AK63232) - 64 pin SIM or
ZIP designs
·
Operating temperature range in free air, 0
0
C to 70
0
C
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of the stan-
dard 1 Meg x 4 SRAMs used to construct these modules. Accutek’s
module design allows the flexibility of selecting industry-compatible 1
Meg x 4 SRAMs from several semiconductor manufacturers.
PIN NOMENCLATURE
A
0
- A
19
CE
1
- CE
4
DQ
1
- DQ
32
OE
PD
0
- PD
3
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
A17
A16
OE
Vss
DQ25
DQ17
DQ26
DQ18
DQ27
DQ19
DQ28
DQ20
A3
A10
A4
A11
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
A5
A12
Vcc
A13
A6
DQ21
DQ29
DQ22
DQ30
DQ23
DQ31
DQ24
DQ32
Vss
A18
A19
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
NC
NC
PD2
PD3
Vss
PD0
PD1
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
DQ4
DQ12
Vcc
A0
A7
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
A1
A8
A2
A9
DQ13
DQ5
DQ14
DQ6
DQ15
DQ7
DQ16
DQ8
Vss
WE
A15
A14
CE2
CE1
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
MODULE OPTIONS
Leadless SIM: AK6321024W
Leades ZIP: AK6321024Z
Leaded SIP: AK6321024G
13
14
15
16
17
18
PD
0
= Vss
PD
1
= Open
PD
2
= Vss
PD
3
= Open
Position
1
2
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
1
2
3
4
5
6
7
8
MECHANICAL DIMENSIONS
Inches
Top View ZIP
3
4
5
6
7
8
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
59
60
61
62
64
63
0.670
MAX
0.405
0.395
.100 x .100
ANGLE NOTCH
0.125
0.155
0.550
MAX
C
L
0.050
TYP
CC
LL
0.250
+
C
L
0.250
TYP
CC
LL
0.050
TYP
3.855
3.845
0.050
TYP
4.255
4.245
0.125
TYP
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.
+
0.100
TYP
EXAMPLES:
AK6321024W-15
1 Meg x 32, 15 nSEC SRAM Module, SIM Configuration
AK6321024Z-17
1 Meg x 32, 17 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: 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.
C C
L L
0.350
MAX
0.350
MAX
