ACCUTEK AK632256Z 262,144 x 32 bit cmos/bicmos static random access memory Datasheet

Accutek
Microcircuit
Corporation
AK632256W / AK632256Z
262,144 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
DESCRIPTION
Front View
64-Pin SIM
The Accutek AK632256 SRAM Module consists of eight fast high
performance SRAMs mounted on a low profile, 64 pin SIM or ZIP
Board. The module utilizes four 28 pin 256K x 4 SRAMs in SOJ
packages and four decoupling capacitors mounted on each side of
a printed circuit board.
1
32
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 0.680 inch SIM or 0.540 inch ZIP to provide for the lowest height
off the board. By offset-mounting the back surface SRAMs on the
SIM version, the module can be mounted in either angled or
straight-up SIM sockets. Each conforms 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 or ZIP format
· Common I/O, single OE functions with four separate chip
selects (CE)
· Low height, 0.680 inch SIM or 0.540 inch ZIP maximum
· Upward compatible with 512K x 32 (AK532512) and
1 Meg x 32 (AK6321024)
PIN NOMENCLATURE
1
32
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
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
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
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
Power Supply
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
MODULE OPTIONS
12
Vcc
28
WE
44
DQ19
60
DQ23
13
A0
29
A15
45
DQ28
61
DQ31
Leadless SIM: AK632256W
14
A7
30
A14
46
DQ20
62
DQ24
15
A1
31
CE2
47
A3
63
DQ32
16
A8
32
CE1
48
A10
64
Vss
Vcc
Vss
Ground
WE
Write Enable
Leaded SIP: AK632256G
Leaded ZIP: AK632256Z
PD0 = Vss
PD1 = Vss
64
ELECTRICAL SPECIFICATIONS
SYMBOL
CE1 - CE4
33
· Downward compatible with 32K x 32 (AK63232), 64K x 32
(AK63264) and 128K x 32 (AK632128)
· Presence Detect PD0 and PD1 for identifying module density
· Fast access times range from 12 nSEC BiCMOS to 45 nSEC
CMOS
· TTL-compatible inputs and outputs
· Single 5 volt power supply - AK632256W, AK632256Z
· Single 3.3 volt power supply - AK632256W/3.3,
AK632256Z/3.3
· Operating temperature range in free air, 00C to 700C
1
Address Inputs
64
64-Pin ZIP
PIN #
A0 - A17
33
MECHANICAL DIMENSIONS
ORDERING INFORMATION
Inches
PART NUMBER CODING INTERPRETATION
Position
1
2
3
4
5
6
7
8
Top View ZIP
1
1
2
3
Height of SIM Version = 0.600”
4
5
Height of ZIP Version = 0.500”
6
59
60
61
62
63
64
0.680
MAX
.425
.375
0.540
MAX
.100 x .100
ANGLE NOTCH
0.125
0.155
1
CL
1
0.135
0.165
CLCL
CLCL
0.050
TYP
3.590
3.610
3.855
3.845
0.050
TYP
64
0.100
TYP
CL CL
0.350
MAX
0.350
MAX
AK632256W-12
256K x 32, 12 nSEC SRAM Module, SIM Configuration
Module also available using 300 mil SRAMs
0.125
0.135
EXAMPLES:
C
L
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 00C to +700C
M = Military Equivalent Screened
(-550C to +1250C)
I = Industrial Temperature Tested
(-450C to +850C)
X = Burned In
8 Speed (first two significant digits)
DRAMS
SRAMS
60 = 60 nS
12 = 12 nS
70 = 70 nS
20 = 20 nS
80 = 80 nS
25 = 25 nS
10 = 100 nS 35 = 35 nS
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.
AK632256Z-15
256K x 32, 15 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
E-mail:
[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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