ACCUTEK AK632256AW 262,144 x 32 bit cmos/bicmos static random access memory Datasheet

DESCRIPTION
Accutek
Microcircuit
Corporation
AK632256AW
262,144 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
The Accutek AK632256AW SRAM Module consists of eight fast
high performance SRAMs mounted on a low profile, 64 pin SIM
PCB. The module utilizes four 28 pin 256K x 4 SRAMs in 300 mil
SOJ packages and four decoupling capacitor chips mounted on
each side of a printed circuit board.
Top View
64-Pin SIM
The SRAMs used have common I/O functions and single output enable 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 to provide for the lowest height off the board. By offset-mounting the back surface SRAMs the module can be mounted
in either angled or straight-up SIM sockets. The modules conform
to JEDEC standard sizes and pin-out configurations. Using two
pins for module memory density identification, PD0 and PD1, minimizes interchangeability and design considerations when changing
from one module size to another in customer applications.
FEATURES
·
·
·
·
·
262,144 x 32 bit organization
JEDEC Standardized 64 pin SIM format
Available with solder or gold leads
Presence Detect PD0 and PD1 for identifying module density
Common I/O, single OE functions with four separate chip
selects (CE)
· Low height, 0.600 inch maximum seated height
· Single 5 volt power suppy - AK632256AW
· Single 3.3 volt power supply - AK632256AW/3.3
PIN NOMENCLATURE
1
32
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 256K x 4 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting industry-compatible 256K x 4 SRAMs from several semiconductor manufacturers.
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
1
Vss
17
A2
33
CE4
49
A4
Chip Enable
2
PD0
18
A9
34
CE3
50
A11
Data In/Data Out
3
PD1
19
DQ13
35
A17
51
A5
4
DQ1
20
DQ5
36
A16
52
A12
Address Inputs
CE1 - CE4
DQ1 - DQ32
SYMBOL
OE
Output Enable
5
DQ9
21
DQ14
37
OE
53
Vcc
PD0 - PD1
Presence Detect
6
DQ2
22
DQ6
38
Vss
54
A13
Vcc
Power Supply
7
DQ10
23
DQ15
39
DQ25
55
A6
8
DQ3
24
DQ7
40
DQ17
56
DQ21
DQ29
Vss
Ground
WE
Write Enable
MODULE OPTIONS
Leadless SIM, Solder Leads: AK632256AW
Leadless SIM, Gold Leads: AK632256AWG
9
DQ11
25
DQ16
41
DQ26
57
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 = Vss
PD1 = Vss
64
· Downward compatible with 128K x 32 (AK632128), 64K x 32
(AK63264) and 32K x 32 (AK63232)
· Upward compatible with 512K x 32 (AK632512) and 1 Meg x 32
(AK6321024)
· Fast access times range from 12 nSEC BiCMOS to 45 nSEC
CMOS
· TTL-compatible inputs and outputs
· Operating temperature range in free air, 00C to 700C
PIN #
A0 - A17
33
MECHANICAL DIMENSIONS
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position
2
8
3.855
3.845
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 00C to +700C
M = Military Equivalent Screened
(-550C to +1250C)
I = Industrial Temperature Tested
(-450C to +850C)
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
8
Inches
7
0.050
TYP
7
6
CL CL
6
5
0.135
0.165
5
4
CL
4
3
0.425
0.375
3
2
0.600
MAX
1
1
72
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:
AK632256AWG-12
AK632256AW-15
0.350
MAX
256K x 32, 12 nSEC SRAM Module, SIM Configuration with Gold Leads
256K x 32, 15nSEC SRAM Module, SIM Configuration with Solder Leads
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:
[email protected]
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.
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