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AK594096Z Datasheet(PDF) 1 Page - ACCUTEK MICROCIRCUIT CORPORATION

Part # AK594096Z
Description  262,144 X 8 Bit MOS Dynamic Random Access Memory
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Manufacturer  ACCUTEK [ACCUTEK MICROCIRCUIT CORPORATION]
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AK594096Z Datasheet(HTML) 1 Page - ACCUTEK MICROCIRCUIT CORPORATION

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DESCRIPTION
The Accutek AK48256 high density memory modules is a random
access memory organized in 256K x 8 bit words. The assembly
consists of eight standard 256K x 1 DRAMs in plastic leaded chip
carriers (PLCC) 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 AK48256 is identical to eight 256K x 1 DRAMs.
The data input is tied to the data output and brought out separately
for each device, with common RAS, CAS and WE 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 al-
ways go low before CAS in a write cycle, Read-Write and
Read-Modify-Write operation is not possible.
FEATURES
· 262,144 by 8 bit organization
· Optional 30 Pad leadless SIM (Single In-Line Module) or 30
Pin leaded SIP (Single In-Line Package)
· JEDEC standard pinout
· Each device has common D and Q lines with common RAS,
CAS and WE control
· 2.8 Watt active and 180 mW standby (max)
· Operating free air temperature 0
0Cto700C
· Upward compatible with AK481024, AK581024, AK584096 and
AK5816384
· Functionally and Pin compatible with AK58256A
Accutek
Microcircuit
Corporation
AK48256S / AK48256G
262,144 X 8 Bit MOS
Dynamic Random Access Memory
1
30
1
Front View
30-Pin SIM
30-Pin SIP
PIN NOMENCLATURE
A0 -A8
Address Inputs
DQ1 -DQ8
Data In / Data Out
CAS
Column Address Strobe
RAS
Row Address Strobe
WE
Write Enable
Vcc
5v Supply
Vss
Ground
NC
No Connect
MODULE OPTIONS
Leadless SIM: AK48256S
Leaded SIP: AK48256G
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
1
Vcc
16
DQ5
2
CAS
17
A8
3
DQ!
18
NC
4A0
19
NC
5
A1
20
DQ6
6
DQ2
21
WE
7
A2
22
Vss
8
A3
23
DQ7
9
Vss
24
NC
10
DQ3
25
DQ8
11
A4
26
NC
12
A5
27
RAS
13
DQ4
28
NC
14
A6
29
NC
15
A7
30
Vcc
FUNCTIONAL DIAGRAM


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