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PDF AK594096AS Data sheet ( Hoja de datos )
| Número de pieza | AK594096AS | |
| Descripción | 4194304 Word x 9 Bit CMOS Dynamic Random Access Memory | |
| Fabricantes | ACCUTEK | |
| Logotipo |  |
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ACCUTEK
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 (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.
AK594096AS / AK594096AG
4,194,304 Word x 9 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
1
30-Pin SIP
30
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 D9 and Q9
· 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 00C to 700C
· Upward compatible with AK5916384
· Downward compatible with AK591024, AK59256
PIN NOMENCLATURE
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
DQ1 - DQ8
D9
Data In / Data Out
Data In 9
PIN #
1
2
SYMBOL
Vcc
CAS
PIN #
16
17
SYMBOL
DQ5
A8
Q9
A0 - A10
CAS, PCAS
Data Out 9
Address Inputs
Column Address Strobe
3
4
5
6
DQ1
18
A9
A0 19 A10
A1 20 DQ6
DQ2
21
WE
RAS
WE
Vcc
Row Address Strobe
7
A2 22 Vss
Write Enable
5v Supply
8 A3 23 DQ7
9 Vss 24 NC
10 DQ3 25 DQ8
Vss Ground
NC No Connect
11 A4 26 Q9
12 A5 27 RAS
13 DQ4 28 PCAS
MODULE OPTIONS
14 A6 29 D9
15 A7 30 Vcc
Leadless SIM: AK594096AS
Leaded SIP: AK594096AG
http://www.Datasheet4U.com
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