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参数资料
| 型号： | AK632256W-72 |
| 厂商： | Accutek Microcircuit Corporation |
| 英文描述： | 262,144 x 32 Bit CMOS/BiCMOS 72 Pin Format Static Random Access Memory |
| 中文描述： | 262,144 × 32位的CMOS / BiCMOS工艺72引脚格式静态随机存取存储器 |
| 文件页数： | 1/2页 |
| 文件大小： | 96K |
| 代理商： | AK632256W-72 |
DESCRIPTION
The Accutek AK632256W-72 SRAM Module consists of fast high
performance SRAMs mounted on a low profile, 72 pin SIM Board.
The module utilizes four 28 pin 256K x 4 SRAMs in 400 mil SOJ
packages and four decoupling capacitors mounted on each side of
a printed circuit board.
TheSRAMsusedhavecommonI/Ofunctionsandsingleoutputen-
ablefunctions. Also,fourseparatechipselect(CE)connectionsare
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 to provide for the lowest height off the board. By off-
set-mountingthebacksurfaceSRAMs themodulecanbemounted
in either angled or straight-up SIM sockets. The module conforms
to JEDEC standard sizes and pin-out configurations. Using four
pins for module memory density identification, PD
0
to PD
3
, mini-
mizesinterchangeabilityanddesignconsiderationswhenchanging
from one module size to another in customer applications.
FEATURES
262,144 x 32 bit organization
JEDEC Standardized 72 pin SIM or ZIP pinout
Common I/O, single OE functions with four separate chip se-
lects (CE)
Low height, 0.680 inch maximum
Upward compatible with 512K x 32 (AK632512) and 1 Meg x 32
(AK6321024)
Downward compatible with 32K x 32 (AK63232), 64K x 32
(AK63264) and 128K x 32 AK632128
Presence Detect PD
0
to PD
3
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-72
Single 3.3 volt power supply - AK632256W-72/3.3
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 standard 256K x 4 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible256Kx4SRAMsfromseveralsemiconductormanu-
facturers.
PIN ASSIGNMENT
Accutek
Microcircuit
Corporation
AK632256W-72
262,144 x 32 Bit CMOS/BiCMOS
72 Pin Format
Static Random Access Memory
Front View
72-Pin SIM
PIN NOMENCLATURE
A
0
- A
17
Address Inputs
CE
1
- CE
4
Chip Enable
DQ
1
- DQ
32
Data In/Data Out
OE
Output Enable
PD
0
- PD
3
Presence Detect
Vcc
5v Supply
Vss
Ground
WE
Write Enable
NC
No Connect
MODULE OPTIONS
Leadless SIM: AK632256W-72
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
1
NC
19
A1
37
CE4
55
A5
2
NC
20
A8
38
CE3
56
A12
3
PD2/NC
21
A2
39
A17
57
Vcc
4
PD3/NC
22
A9
40
A16
58
A13
5
Vss
23
DQ13
41
OE
59
A6
6
PD0
24
DQ5
42
Vss
60
DQ21
7
PD1
25
DQ14
43
DQ25
61
DQ29
8
DQ1
26
DQ6
44
DQ17
62
DQ22
9
DQ9
27
DQ15
45
DQ26
63
DQ38
10
DQ2
28
DQ7
46
DQ18
64
DQ23
11
DQ10
29
DQ16
47
DQ27
65
DQ31
12
DQ3
30
DQ8
48
DQ19
66
DQ24
13
DQ11
31
Vss
49
DQ28
67
DQ32
14
DQ4
32
WE
50
DQ20
68
Vss
15
DQ12
33
A15
51
A3
69
A18/NC
16
Vcc
34
A14
52
A10
70
A19/NC
17
A0
35
CE2
53
A4
71
NC
18
A7
36
CE1
54
A11
72
NC
PD0 = Vss
PD1 = Vss
PD2 = Open
PD3 = Open
FUNCTIONAL DIAGRAM
相关PDF资料 |
PDF描述 |
|---|---|
| AK632256W72-12 | 262,144 x 32 Bit CMOS/BiCMOS 72 Pin Format Static Random Access Memory |
| AK632256Z-15 | 262,144 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK63232Z | 32,768 x 32 Bit CMOS / BiCMOS Static Random Access Memory |
| AK632512AW | 524,288 x 32 Bit CMOS / BiCMOS Static Random Access Memory |
| AK632512AW-15 | 524,288 x 32 Bit CMOS / BiCMOS Static Random Access Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AK632256W72-12 | 制造商:ACCUTEK 制造商全称:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:262,144 x 32 Bit CMOS/BiCMOS 72 Pin Format Static Random Access Memory |
| AK632256Z | 制造商:ACCUTEK 制造商全称:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:262,144 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK632256Z-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:x32 SRAM Module |
| AK632256Z-15 | 制造商:ACCUTEK 制造商全称:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:262,144 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK632256Z-20 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:x32 SRAM Module |
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