DataSheet26.com

AK491024S PDF даташит

Спецификация AK491024S изготовлена ​​​​«ACCUTEK» и имеет функцию, называемую «1048576 Word x 9 Bit CMOS Dynamic Random Access Memory».

Детали детали

Номер произв AK491024S
Описание 1048576 Word x 9 Bit CMOS Dynamic Random Access Memory
Производители ACCUTEK
логотип ACCUTEK логотип 

2 Pages
scroll

No Preview Available !

AK491024S Даташит, Описание, Даташиты
ACCUTEK
MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK491024 high density memory module is a random
access memory organized in 1 Meg x 9 bit words. The assembly
consists of nine standard 1 Meg x 1 DRAMs in plastic leaded chip
carriers (SOJ) mounted on the front side of a printed circuit board.
The module can be configured as a leadless 30 pad SIM or a leaded
30 pin SIP. This packaging approach provides a 6 to 1 density in-
crease over standard DIP packaging.
The operation of the AK491024 is identical to nine 1 Meg x 1
DRAMs. For the lower eight bits data input is tied to the data output
and brought out separately for each device, with common RAS,
CAS control. This common I/O feature dictates the use of
early-write cycles to prevent contention of D and Q. Since the
Write-Enable (WE) signal must always go low before CAS in a write
cycle, Read-Write and Read-Modify-Write operation is not possible.
For the ninth bit, the data input (D9) and the data output (Q9) pins are
brought out separately and controlled by a separate PCAS for that
bit. Bit nine is generally used for parity.
FEATURES
· 1,048,576 x 9 bit organization
· Optional 30 Pad leadless SIM (Single In-Line Module) or 30
Pin leaded SIP (Single In-Line Package)
· JEDEC standard pinout
· Common CAS and RAS control for the lower eight bits
· Separate PCAS control for D9 and Q9
· CAS-before-RAS refresh
AK491024S / AK491024G
1,048,576 Word x 9 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
1
30-Pin SIP
30
1
· Power
3.465 Watt Max Active (80 nSEC)
2.97 Watt Max Active (100 nSEC)
2.475 Watt Max Active (120 nSEC)
49.5 mW Max Standby
· Operating free air temperature 00C to 700C
· Upward compatible with AK594096 and AK5916384
· Downward compatible with AK49256
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ1 - DQ8
D9
Q9
A0 - A9
CAS, PCAS
RAS
WE
Vcc
Vss
NC
Data In / Data Out
Data In 9
Data Out 9
Address Inputs
Column Address Strobe
Row Address Strobe
Write Enable
5v Supply
Ground
No Connect
MODULE OPTIONS
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SYMBOL
Vcc
CAS
DQ1
A0
A1
DQ2
A2
A3
Vss
DQ3
A4
A5
DQ4
A6
A7
PIN #
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Leadless SIM: AK491024S
Leaded SIP: AK491024G
SYMBOL
DQ5
A8
A9
NC
DQ6
WE
Vss
DQ7
NC
DQ8
Q9
RAS
PCAS
D9
Vcc
FUNCTIONAL DIAGRAM
http://www.Datasheet4U.com









No Preview Available !

AK491024S Даташит, Описание, Даташиты
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position
12345678
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
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
50 = 50 nS 8 = 8 nS
60 = 60 nS 10 = 10 nS
70 = 70 nS 12 = 12 nS
80 = 80 nS 15 = 15 nS
MECHANICAL DIMENSIONS
Inches
0.100
TYP
The numbers and coding on this page do not include all variations avail-
able but are show as examples of the most widely used variations.
Contact Accutek if other information is required.
EXAMPLES:
AK491024SP-80
1 Meg x 9, 80 nSEC DRAM 30 pin SIM Configuration, Page Mode
AK491024GN-70
1 Meg x 9, 70 nSEC Dram 30 pin SIP Configuration, Nibble Mode
ACCUTEK
MICROCIRCUIT CORPORATION
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
PHONE: 978-465-6200 FAX: 978-462-3396
Internet: www.accutekmicro.com
Accutek reserves the right to make changes in specifications at any
time and without notice. Accutek does not assume any responsibil-
ity for the use of any circuitry described; no circuit patent licenses
are implied. Preliminary data sheets contain minimum and maxi-
mum limits based upon design objectives, which are subject to
change upon full characterization over the specific operating condi-
tions.










Скачать PDF:

[ AK491024S.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
AK491024G1048576 Word x 9 Bit CMOS Dynamic Random Access MemoryACCUTEK
ACCUTEK
AK491024S1048576 Word x 9 Bit CMOS Dynamic Random Access MemoryACCUTEK
ACCUTEK

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск