DESCRIPTION
The Accutek AK594096 high density memory module is a CMOS
random access memory organized in 4 Meg x 9 bit words. The as-
sembly consists of two 4 Meg x 4 and one 4 Meg x 1 DRAMs,
mounted on the front side of a printed circuit board in 30 pad SIM
(leadless) or 30 pin SIP (leaded) configuration with
JEDEC-standard pinouts. Designed especially for low-height appli-
cations such as VMEbus boards, this low profile module is 0.550
inch high.
The operation is identical to nine 4 Meg x 1 DRAMs. For the lower
eight bits, data input is tied to data output and brought out sepa-
rately for each bit, with common RAS and CAS control. This com-
mon I/O feature dictates the use of early-write cycles to prevent
contention of data In and data out. Since the Write-Enable (WE)i
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,
data in (D9) and data out (Q9) pins are brought our separately and
controlled by a separate PCAS for that bit.
FEATURES
·4,194,304 x 9 bit organization
·Low Profile 30 pad (SIM) Single In-Line Memory
·Low Profile 30 pin (SIP) Single In-Line package
·JEDEC standard pinout
·Common CAS,RAS and WE for the lower eight bits
·CAS-before-RAS refresh
·Refresh cycle 2048 cycles in 32 mSEC
·Power
1.450 Watt Max Active, 70 nSEC
1.610 Watt Max Active, 60 nSEC
16.5 mWatt Max Standy
·Operating free air temperature 00Cto70
0C
·Downward compatible with AK591024 and AK59256
·Upward compatible with AK5916384
·Fast Page Mode and Static Column Mode versions available,
nibble mode is not possible
Accutek
Microcircuit
Corporation
AK594096BS / AK594096BG
4,194,304 Word by 9 Bit CMOS
Dynamic Random Access Memory
PIN NOMENCLATURE
A0-A
10 Address Inputs
RAS0Row Address Strobe
CAS Column Address Strobe
WE Write Enable
OE Output Enable
DQ1-DQ
8Data In/Data Out
D9Data In
Q9Data Out
Vcc 5v Supply
Vss Ground
NC No Connect
MODULE OPTIONS
Leadless SIM: AK594096BS
Leaded SIP: AK594096BG
PIN ASSIGNMENT
1 Vcc 16 DQ5
2 CAS 17 A8
3 DQ1 18 A9
4 A0 19 A10
5 A1 20 DQ6
6 DQ2 21 WE
7 A2 22 Vss
8 A3 23 DQ7
9 Vss 24 NC
10 DQ3 25 DQ8
11 A4 26 NC
12 A5 27 RAS0
13 DQ4 28 NC
14 A6 29 NC
15 A7 30 Vcc
+
1
+
+
+
Front View
30-Pin SIM
30-Pin SIP
FUNCTIONAL DIAGRAM
*
A-A
DQ1
DQ2
DQ3
DQ4
010
RAS
CAS
WE
OE
*
*
*
A-A
DQ1
DQ2
DQ3
DQ4
09
RAS
CAS
WE
OE
*
*
*
A-A
D
011
RAS
CAS
WE
Q
*
*
*
+
WE
+
+
CAS
RAS
A-A
010
+
*
*
*
*
+
+
+
+
*
*
*
+
+
+
*
+
*
+
*
+
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
D9
Q9
*
+
PCAS
11
ORDERING INFORMATION
PART NUMBER CODING INTERPRETATION
Position 12345678
1 Product
AK = Accutek Memory
2 Type
4 = Dynamic RAM
5 = CMOS Dynamic RAM
6 = Static RAM
3 Organization/Word Width
1 = by 1 16 = by 16
4 = by 4 32 = by 32
8 = by 8 36 = by 36
9 = by 9
4 Size/Bits Depth
64 = 64K 4096 = 4 MEG
256 = 256K 8192 = 8 MEG
1024 = 1 MEG 16384 = 16 MEG
5 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)
6 Special Designation
P = Page Mode
N = Nibble Mode
K = Static Column Mode
W = Write Per Bit Mode
V = Video Ram
7 Separator
- = Commercial 00Cto+70
0C
M = Military Equivalent Screened
(-550C to +1250C)
I = Industrial Temperature Tested
(-450Cto+85
0C)
X = Burned In
8 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
EXAMPLES:
AK594096BGP-70
4 Meg x 9, CMOS Dynamic RAM, Leaded SIP, Page Mode, Com-
mercial, 70 nSEC Access Time
AK594096BSP-60
4 Meg x 9, CMOS Dynamic RAM, Leadless SIM, Page Mode, Com-
mercial, 60 nSEC Access Time
MECHANICAL DIMENSIONS
Inches
3.100"
MAX
.550"
MAX
0.100"
C
L
0.200"
MAX
3.505"
MAX
.550"
MAX
0.100"
C
L
+
+
C
L
C
L
+
1
+
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.
ACCUTEK MICROCIRCUIT CORPORATION
BUSINESS CENTER at NEWBURYPORT
2 NEW PASTURE ROAD, SUITE 1
NEWBURYPORT, MA 01950-4054
VOICE: 978-465-6200 FAX: 978-462-3396
Email: sales@accutekmicro.com
Internet: www.accutekmicro.com
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.
