DESCRIPTION
The Accutek AK632512 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low height, 72 pin SIM or ZIP Board.
The module utilizes four 36 pin 512K x 8 SRAMs in 400 mil SOJ
packages and four decoupling capacitors mounted on the front side
of a printed circuit board.
The SRAMs used have common I/O functions and single output en-
able functions. Also, four separate chip select (CE) connections are
used to independently enable the four bytes. The modules can be
supplied in a variety of access time values from 15 nSEC to
35 nSEC in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.640 inch SIM or 0.555 inch ZIP to provide for the lowest height
off the board. Each conforms to JEDEC-standard sizes and pin-out
configurations. Using four pins for module memory density identifi-
cation, PD0,PD
1,PD
2and PD3minimizes interchangeability and
design considerations when changing from one module size to the
other in customer applications.
FEATURES
·524,288 x 32 bit organization
·JEDEC Standard 72 pin SIM or ZIP format
·Common I/O, single OE and WE functions with four separate
chip selects (CE)
·Fast access times from 15 nSEC
·Low height, 0.640 inch SIM or 0.555 inch ZIP maximum
·Power:
720mA Max Active (20 nSEC)
760mA Max Active (15 nSEC)
800mA Max Active (12 nSEC)
200mA Max Standby
·Presence Detect, PD0, PD1, PD2 and PD3 for identifying module
density
·Downward compatible with 256K x 32 (AK632256), 128K x 32
(AK632128), 64K x 32 (AK63264) and 32K x 32 (AK63232), 64
pin SIM or ZIP designs
·Upward compatible with 1 Meg x 32 (AK6321024)
·TTL-compatible inputs and outputs
·Single +5 Volt (æ10%) power supply
·Operating free air temperature 00to 700C
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of the
standard 512K x 8 SRAMs used to construct these modules.
Accutek’s module design allows the flexibility of selecting indus-
try-compatible 512K x 8 SRAMs from several SRAM manufacturers.
Accutek
Microcircuit
Corporation
AK632512W / AK632512Z
524,288 x 32 Bit CMOS / BiCMOS
Static Random Access Memory
136 37 72
136
37 72
72-Pin ZIP
72-Pin SIM
Front View
PIN NOMENCLATURE
A0-A
18 Address Inputs
CE1-CE
4Chip Enable
DQ1-DQ
32 Data In/Data Out
OE Output Enable
PD0-PD
3Presence Detect
Vcc 5v Supply
Vss Ground
WE Write Enable
MODULE OPTIONS
Leadless SIM: AK632512W
Leaded SIP: AK632512G
Leaded ZIP: AK632512Z
PIN ASSIGNMENT
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
1 NC19A137CE455 A5
2 NC20A838CE3 56 A12
3 PD2 21 A2 39 A17 57 Vcc
4 PD3 22 A9 40 A16 58 A13
5 Vss 23 DQ13 41 OE 59 A6
6 PD0 24 DQ5 42 Vss 60 DQ21
7 PD1 25 DQ14 43 DQ25 61 DQ29
8 DQ1 26 DQ6 44 DQ17 62 DQ22
9 DQ9 27 DQ15 45 DQ26 63 DQ30
10 DQ2 28 DQ7 46 DQ18 64 DQ23
11 DQ10 29 DQ16 47 DQ27 65 DQ31
12 DQ3 30 DQ8 48 DQ19 66 DQ24
13 DQ11 31 Vss 49 DQ27 67 DQ32
14 DQ4 32 WE 50 DQ20 68 Vss
15 DQ12 33 A15 51 A3 69 A18
16 Vcc 34 A14 52 A10 70 NC
17 A0 35 CE253A471NC
18 A7 36 CE1 54 A11 72 NC
PD0 = Open PD2 = Vss
PD1 = Open PD3 = Open
FUNCTIONAL DIAGRAM
A0-A18
A0-A18
A0-A18
A0-A168
WE
WE
WE
WE
DQ1 - DQ8
DQ1 - DQ8
DQ1 - DQ8
DQ1 - DQ8
OE
OE
OE
OE
CE
CE
CE
CE
+
+
+
+
DQ1 - DQ8
DQ9 - DQ16
DQ17 - DQ24
DQ25 - DQ32
+
A0 - A18 19
+*
*
*
*
+*
*
*
*
+
+
+
+
*
*
*
*
WE
OE
CE1
CE2
CE3
CE4
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 = 25 nS
80 = 80 nS 15 = 15 nS
The numbers and coding on this page do not include all variations
available but are shown as examples of the most widely used
variations. Contact Accutek if other information is required.
0.640
MAX
4.255
4.245
0.250
0.150
TYP
C
L
0.200
MAX
0.405
0.395
0.050
TYP
C
L
C
L
172
3.855
MAX
0.035
0.065 0.050
TYP
C
L
C
L
C
L
0.555
MAX
.100 x .100
ANGLE NOTCH
C
L
C
L
0.200
MAX
0.100
TYP
0.125
0.155
0.130
0.120
135
24672
7068
71
69
67
Top View ZIP
172
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
EXAMPLES:
AK632512W-15
512K x 32, 15 nSEC SRAM Module, SIM Configuration
AK632512Z-20
512K x 32, 20 nSEC SRAM Module, ZIP Configuration
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.
MECHANICAL DIMENSIONS
Inches
