AK632256ZN-20 [ACCUTEK]
SRAM;
| 型号： | AK632256ZN-20 |
| 厂家： | 
ACCUTEK MICROCIRCUIT CORPORATION |
| 描述： | SRAM 静态存储器 |
| 文件： | 总2页 (文件大小：150K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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 33
64
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 12 nSEC to
45 nSEC in CMOS or BiCMOS technology.
64-Pin ZIP
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 den-
sity identification, PD0 and PD1, minimizes interchangeability and
design considerations when changing from one module size to an-
other in customer applications.
1
32
33
64
· 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 ( 10ꢀ) power supply
· Operating temperature range in free air, 00C to 700C
FEATURES
· 262,144 x 32 bit organization
ELECTRICAL SPECIFICATIONS
· JEDEC Standardized 64 pin SIM or ZIP format
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 indus-
try-compatible 256K x 4 SRAMs from several semiconductor manu-
facturers.
· 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
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
PIN #
1
SYMBOL
Vss
PD0
PD1
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
DQ4
DQ12
Vcc
A0
PIN #
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SYMBOL
A2
PIN #
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
SYMBOL
CE4
CE3
A17
PIN #
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
SYMBOL
A4
A0 - A17
CE1 - CE4
DQ1 - DQ32
OE
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
5v Supply
2
A9
A11
3
DQ13
DQ5
DQ14
DQ6
DQ15
DQ7
DQ16
DQ8
Vss
WE
A5
4
A16
A12
5
OE
Vcc
PD0 - PD1
Vcc
6
Vss
A13
7
DQ25
DQ17
DQ26
DQ18
DQ27
DQ19
DQ28
DQ20
A3
A6
8
DQ21
DQ29
DQ22
DQ30
DQ23
DQ31
DQ24
DQ32
Vss
Vss
Ground
9
WE
Write Enable
10
11
12
13
14
15
16
MODULE OPTIONS
A15
A7
A14
Leadless SIM: AK632256W
Leaded SIP: AK632256G
Leaded ZIP: AK632256Z
A1
CE2
CE1
A8
A10
PD0 = Vss
PD1 = Vss
ORDERING INFORMATION
MECHANICAL DIMENSIONS
Inches
PART NUMBER CODING INTERPRETATION
5
1
2
3
4
6
7
8
Position
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
8192 = 8 MEG
1024 = 1 MEG 16384 = 16 MEG
256 = 256K
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)
SRAMS
DRAMS
60
70
80
10
=
=
=
=
60 nS
70 nS
80 nS
12
20
25
=
=
=
=
12 nS
20 nS
25 nS
35 nS
100 nS 35
The numbers and coding on this page do not include all varia-
tions available but are shown as examples of the most widely
used variations. Contact Accutek if other information is re-
quired.
EXAMPLES:
AK632256W-12
256K x 32, 12 nSEC SRAM Module, SIM Configuration
AK632256Z-15
256K x 32, 15 nSEC SRAM Module, ZIP Configuration
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.
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: accutek@seacoast.com
Internet: www.accutekmicro.com
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