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參數(shù)資料
| 型號(hào)： | AK681024G-70LL |
| 廠商： | Accutek Microcircuit Corporation |
| 英文描述： | 1,048,579 x 8 Bit CMOS Static Random Access Memory |
| 中文描述： | 1048579 × 8位CMOS靜態(tài)隨機(jī)存取存儲(chǔ)器 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 162K |
| 代理商： | AK681024G-70LL |
DESCRIPTION
The Accutek AK681024G is a high density SRAM memory module
organizedin1MegX8bitwords.Theassemblyconsistsoffourme-
diumspeed128KX8SRAMsinthinTSOPpackages,plusaCMOS
decoder logic IC and four decoupling capacitor chips, mounted on
the front side and four medium speed 128K x 8 SRAMS in thin
TSOP packages and four decoupling capacitor chips mounted on
thebacksideofa low-profileprintedcircuitboard.The modulecon-
figuration is a 36 pin leaded SIP.
The memory operates as a single asynchronous 1 Meg X 8 SRAM
from a 5V supply, and has common I/O, chip enable, output enable
and write enable functions. With the proper choice of SRAMs, it is
available in three separate low-standby-powerconfigurations, with
access times of 55, 70, 85 or 100 nSEC.
The combination of lowpower,lowprofile and high density packag-
ing offered by the AK681024G makes it ideal for use in applications
where board space and available power are limited and extremely
lowaccess times are not required. It is especiallyuseful in VMEbus
designs and in places where very close module-to-module spacing
is dictated.
FEATURES
1,048,576 x 8 bit organization
JEDEC Standard 36 pin SIP format
Common I/O, single OE, CE and WE functions
Low 0.550 inch maximum seated height and thin profile allow
maximum board density
Range of access times from 55 to 100 nSEC
Low, low-low and ultra-low standby power level versions avail-
able
Single 5 volt power supply - AK681024G
Single 3.3 volt power supply - AK681024G/3.3
Operating free air temerature 0
0
C to 70
0
C (Industrial range
version of -10
C to 85
C also available)
Completely static and asynchronous, no clock or timing strobe
required
Low
9.0 Watt Max Active
120 μ Watt Max Standby
Low Low
9.0 Watt Max Active
80 μ Watt Standby
Accutek
Microcircuit
Corporation
AK681024G
1,048,579 x 8 Bit CMOS
Static Random Access Memory
1
36
PIN NOMENCLATURE
DQ
0
- DQ
7
Data In/Data Out
A
0
- A
19
Address Inputs
CE
Chip Enable
WE
Write Enable
OE
Output Enable
Vcc
5v Supply
Vss
Ground
NC
No Connection
MODULE OPTIONS
Leaded SIP: AK681024G
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
1
NC
10
A
4
19
CE
28
A
7
2
Vcc
11
Vss
20
A
15
29
A
8
3
WE
12
DQ
5
21
A
16
30
A
9
4
DQ
2
13
A
10
22
A
12
31
DQ
7
5
DQ
3
14
A
11
23
A
18
32
DQ
4
6
DQ
0
15
A
5
24
A
6
33
DQ
6
7
A
1
16
A
13
25
DQ
1
34
A
17
8
A
2
17
A
14
26
Vss
35
Vcc
9
A
3
18
A
19
27
A
0
36
OE
FUNCTIONAL DIAGRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
128K x 8 SRAM
DECODER
C
A
A
A
O
W
A
D
0
1
0
7
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