AK581024AG Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 1,048,576 x 8 bit CMOS Dynamic Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK581024 high density memory modules is a random
access memory organized in 1 Meg x 8 bit words. The assembly
consists of two 1 Meg x 4 DRAMs in surface mount packages
mounted to a printed circuit board. The module can be configured
as a leadless 30 pad SIMM or a leaded 30 pin SIP. This packaging
approach provides a better than 6 to 1 density increase over stan-
dard DIP packaging.
The operation of the AK581024 is identical to two 1 Meg x 4 DRAMs.
The data input/output is brought out separately for each 1 Meg x 4
device, with common RAS, CAS and WE control. The OE pins are
tied to Vss which 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
· 1 Meg x 8 bit organization
· Optional 30 Pad SIM (Single In-Line Module) or 30 Pin leaded
SIP (Single In-Line Package)
· JEDEC approved pinout
· Common CAS, RAS and WE control for eight DQ lines
· Separate CAS control for one separate pair of D and Q lines
· 1024 refresh cycles/16ms, A₀ to A₉
AK581024AG / AK581024AS
1,048,576 x 8 bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
+
+
1
30
30-Pin SIP
+
+
1
· 1.10 Watt active and 23.5 mWatt standby (max)
· Operating free air temperature: 0⁰ to 70⁰C
· Upward compatible with AK584096 and AK5816384
· Functionally and Pin compatible with AK481024
· Available with access times of 60 to 100 nS
PIN NOMENCLATURE
PIN ASSIGNMENT
DQ1 - DQ8
A0 - A9
Data In/Data Out
Address Inputs
PIN #
1
2
SYMBOL
Vcc
CAS
PIN #
16
17
CAS
RAS
WE
Column Address Strobe ³
4
Row Address Strobe
5
Write Enable
6
DQ1
18
A0
19
A1
20
DQ2
21
Vcc
5v Supply
Vss
Ground
NC
No Connect
7
A2
22
8
A3
23
9
Vss
24
10
DQ3
25
11
A4
26
MODULE OPTIONS
12
A5
27
13
DQ4
28
Leadless SIM: AK581024ASP
Leaded SIP: AK581024AGP
14
A6
29
15
A7
30
SYMBOL
DQ5
A8
A9
NC
DQ6
WE
Vss
DQ7
NC
DQ8
NC
RAS
NC
NC
Vcc
FUNCTIONAL DIAGRAM