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參數(shù)資料
| 型號： | AK68512D-85 |
| 英文描述： | x8 SRAM Module |
| 中文描述： | x8的SRAM模塊 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 47K |
| 代理商： | AK68512D-85 |
DESCRIPTION
The Accutek AK68512D high density memory module is a static
random access memory organized in 512K x 8 bit words. The as-
sembly consists of two medium speed 128K x 8 SRAMs in thin
TSOP packages and a CMOS decoder logic IC mounted on the top
side and two medium speed 128K x 8 SRAMs in thin TSOP pack-
ages mounted on the bottom surfaces of a printed circuit board.
The module is supplied in a 600 mil wide,32 pin DIP (Dual In-Line
Package) configuration. This pinout is completely compatible with
forthcoming industry standard monolithic designs. These modules
are intended for use in applications where limited board space dic-
tates compact module designs.
TheoperationoftheAK68512Disidenticaltostandardmonolithic8
bit word wide SRAMs.
TheAK68512Doffersthefeaturesoflowpowerandmediumspeed
byusing CMOSdevicesandmakeshighdensitymountingpossible
with no surface mount technology.
FEATURES
524,288 x 8 bit organization
Fast access time: 85 - 120 nSEC
Completely static RAM, no clock or timing strobe required
Inputs and outputs TTL compatible
Conventional 600 mil wide SIP package with industry
compatible pinout
Single +5 Volt (+/- 10%) power supply
Operating free air temperature 0
0
to 70
0
C
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 128K x 8 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 128K x 8 SRAMs from any of a number of semicon-
ductor manufacturers.
Accutek
Microcircuit
Corporation
AK68512D
524,288 x 8 Bit CMOS
Static Random Access Memory
1
1
Top Vew
Bottom Vew
PIN NOMENCLATURE
DQ
1
- DQ
8
Data In/Data Out
A
0
- A
18
Adress Inputs
CE
Chip Enable
WE
Write Enable
Vcc
5v Supply
Vss
Ground
OE
Output Enable
TIMING OPTIONS
70 nSEC Access Time
85 nSEC Access Time
100 nSEC Access Time
120 nSEC Access Time
PIN ASSIGNMENT
A
A
A
A
A
A
A
A
A
A
A
A
DQ
DQ
DQ
V
18
16
14
12
7
6
5
4
3
2
1
0
1
2
3
SS
V
A
A
WE
A
A
A
A
OE
A
CE
DQ
DQ
DQ
DQ
DQ
CC
15
17
13
8
9
11
8
7
6
5
4
Top View
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
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