ACCUTEK AK481024S Dynamic random access memory Datasheet

AK481024S / AK481024G
1,048,576 x 8 Bit CMOS
Dynamic Random Access Memory
ACCUTEK
DESCRIPTION
MICROCIRCUIT
CORPORATION
Front View
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 increase over standard DIP packaging.
30-Pin SIM
30
1
30-Pin SIP
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 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.
1
FEATURES
· 1,048,576 x 8 bit organization
· Operating free air temperature 00C to 700C
· Optional 30 Pad leadless SIM (Single In-Line Module) or 30
Pin leaded SIP (Single In-Line Package)
· Upward compatible with AK584096 and AK5816384
· JEDEC standard pinout
· Downward compatible with AK48256
· 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
PIN NOMENCLATURE
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
PIN #
SYMBOL
PIN #
SYMBOL
1
Vcc
16
DQ5
Address Inputs
2
CAS
17
A8
Column Address Strobe
3
DQ1
18
A9
4
A0
19
NC
DQ6
DQ1 - DQ8
Data In / Data Out
A0 - A9
CAS
RAS
Row Address Strobe
5
A1
20
WE
Write Enable
6
DQ2
21
WE
Vcc
5v Supply
7
A2
22
Vss
Vss
Ground
8
A3
23
DQ7
NC
No Connect
MODULE OPTIONS
Leadless SIM: AK481024S
Leaded SIP: AK481024G
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
MECHANICAL DIMENSIONS
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position
1
2
3
6
Inches
7
8
0.425
0.375
.100
.060
0.325
0.275
1
1
3.525
3.475
3.100
3.090
30
0.200
MAX
0.053
0.047
Product
AK = Accutek Memory
Type
4 = Dynamic RAM
5 = CMOS Dynamic RAM
6 = Static RAM
Organization/Word Width
1 = by 1 16 = by 16
4 = by 4 32 = by 32
8 = by 8 36 = by 36
9 = by 9
Size/Bits Depth
64 = 64K
4096 = 4 MEG
256 = 256K
8192 = 8 MEG
1024 = 1 MEG 16384 = 16 MEG
Package Type
G = Single In-Line Package (SIP)
S = Single In-Line Module (SIM)
D = Dual In-Line Package (DIP)
W = .050 inch Pitch Edge Connect
Z = Zig-Zag In-Line Package (ZIP)
Special Designation
P = Page Mode
N = Nibble Mode
K = Static Column Mode
W = Write Per Bit Mode
V = Video Ram
Separator
- = Commercial 00C to +700C
M = Military Equivalent Screened
(-550C to +1250C)
I = Industrial Temperature Tested
(-450C to +850C)
X = Burned In
Speed (first two significant digits)
DRAMS
SRAMS
50 = 50 nS
8 =
8 nS
60 = 60 nS
10 = 10 nS
70 = 70 nS
12 = 12 nS
80 = 80 nS
15 = 15 nS
0.815
0.785
8
5
0.024
0.016
7
4
0.100
TYP
6
3
0.100
TYP
5
2
0.815
0.785
4
1
0.100
TYP
The numbers and coding on this page do not include all variations available but are show as examples of the most widely used variations.
Contact Accutek if other information is required.
EXAMPLES:
AK481024SP-80
1 Meg x 8, 80 nSEC DRAM 30 pin SIM Configuration, Page Mode
AK481024GN-70
1 Meg x 8, 70 nSEC Dram 30 pin SIP Configuration, Nibble Mode
ACCUTEK
MICROCIRCUIT CORPORATION
5 NEW PASTURE ROAD
NEWBURYPORT, MA 01950-4040
PHONE: 978-465-6200 FAX: 978-462-3396
Email: [email protected]
Internet: www.accutekmicro.com
Accutek reserves the right to make changes in specifications at any
time and without notice. Accutek does not assume any responsibility for the use of any circuitry described; no circuit patent licenses
are implied. Preliminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to
change upon full characterization over the specific operating conditions.
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