AK481024S 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 AK481024 high density memory module is a random
access memory organized in 1 Meg x 8 bit words. The assembly
consists of eight 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 AK481024 is identical to eight 1 Meg 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 con-
trol. This common I/O feature dictates the use of early-write cycles
to prevent contention of D and Q. Since the Write-Enable (WE) sig-
nal must always go low before CAS in a write cycle, Read-Write and
Read-Modify-Write operation is not possible.
FEATURES
· 1,048,576 x 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
· CAS-before-RAS refresh
· Power
3.08 Watt Max Active (80 nSEC)
2.64 Watt Max Active (100 nSEC)
2.20 Watt Max Active (120 nSEC)
44 mW Max Standby
AK481024S / AK481024G
1,048,576 x 8 Bit CMOS
Dynamic Random Access Memory
Front View
30-Pin SIM
1
30
30-Pin SIP
1
· Operating free air temperature 0⁰C to 70⁰C
· Upward compatible with AK584096 and AK5816384
· Downward compatible with AK48256
PIN NOMENCLATURE
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
DQ1 - DQ8
A0 - A9
Data In / Data Out
Address Inputs
PIN #
1
2
SYMBOL
Vcc
CAS
PIN #
16
17
SYMBOL
DQ5
A8
CAS
RAS
WE
Column Address Strobe ³
4
Row Address Strobe
5
Write Enable
6
DQ1
18
A9
A0
19
NC
A1
20
DQ6
DQ2
21
WE
Vcc
5v Supply
Vss
Ground
NC
No Connect
7
A2
22
Vss
8
A3
23
DQ7
9
Vss
24
NC
10
DQ3
25
DQ8
11
A4
26
NC
MODULE OPTIONS
12
A5
27
RAS
13
DQ4
28
NC
Leadless SIM: AK481024S
Leaded SIP: AK481024G
14
A6
29
NC
15
A7
30
Vcc