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AK594096AS_09 参数 Datasheet PDF下载

AK594096AS_09图片预览
型号: AK594096AS_09
PDF下载: 下载PDF文件 查看货源
内容描述: 动态随机存取存储器 [Dynamic Random Access Memory]
分类和应用: 存储
文件页数/大小: 2 页 / 83 K
品牌: ACCUTEK [ ACCUTEK MICROCIRCUIT CORPORATION ]
 浏览型号AK594096AS_09的Datasheet PDF文件第2页  
MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK594096A high density memory module is a CMOS
random access memory organized in 4 Meg x 9 bit words. The as-
sembly consists of nine standard 4 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. The module is only 0.800 inches high (same
height as a standard 1 Meg module), making it ideally suited for ap-
plications with low height restrictions.
The operation of the AK594096A is identical to nine 4 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 (D
9
) and the data output (Q
9
) pins are
brought out separately and controlled by a separate PCAS for that
bit. Bit nine is generally used for parity.
ACCUTEK
AK594096AS / AK594096AG
4,194,304 Word x 9 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
1
30
30-Pin SIP
1
FEATURES
·
4,194,304 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 for control for D
9
and Q
9
·
CAS-before-RAS refresh
·
Power
4.45 Watt Max Active (80 nSEC)
3.96 Watt Max Active (100 nSEC)
49.5 mW Max Standby
·
Operating free air temperature 0
0
C to 70
0
C
·
Upward compatible with AK5916384
·
Downward compatible with AK591024, AK59256
PIN NOMENCLATURE
DQ
1
- DQ
8
D
9
Q
9
A
0
- A
10
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
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
FUNCTIONAL DIAGRAM
DQ5
A8
A9
A10
DQ6
WE
Vss
DQ7
NC
DQ8
Q9
RAS
PCAS
D9
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Vcc
CAS
DQ1
A0
A1
DQ2
A2
A3
Vss
DQ3
A4
A5
DQ4
A6
A7
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
MODULE OPTIONS
Leadless SIM: AK594096AS
Leaded SIP: AK594096AG
15