DESCRIPTION
The Accutek AK631024 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low profile, 72 pin SIM or ZIP PCB.
The module utilizes four 32 pin 1 Meg x 4 SRAMs in 400 mil SOJ
packages and four decoupling capacitor chips mounted on each
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 15nSEC to 30nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.670 inch SIM or 0.550 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, PC0,PD
1,PD
2and PD3minimizes interchangeability and
design considerations when changing from one module size to the
other in customer applications.
FEATURES
·1,048,576 x 32 SRAM module in high density configuration
·JEDEC Standardized 72 pin SIM format
·Common I/O, single OE functions with four separate chip
selects (CE)
·Low height, 0.670 inch SIM or 0.550 inch ZIP maximum
·Presence Detect PD0through PC3for identifying module density
·TTL compatible inputs and outputs
·Single 5 volt power supply
·Fast access times range from 15 nSEC BiCMOS to 25 nSEC
·Power
170mA Active (15nS)
165mA Active (17nS)
160mA Active (20nS)
155mA Active (25nS)
10mA Standby
·Downward pin compatible with 512K x 32 (AK632512) - 72 pin
SIM or ZIP, and 256K x 32 (AK632256), 128K x 32 (AK632128),
64K x 32 (AK63264) and 32K x 32 (AK63232) - 64 pin SIM or
ZIP designs
·Operating temperature range in free air, 00Cto70
0C
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of the stan-
dard 1 Meg x 4 SRAMs used to construct these modules. Accutek’s
module design allows the flexibility of selecting industry-compatible 1
Meg x 4 SRAMs from several semiconductor manufacturers.
Accutek
Microcircuit
Corporation
AK6321024W / AK6321024Z
1,048,576 x 32 Bit CMOS/BiCMOS
Static Random Access Memory
++
136 37 72
136 37 72
72-Pin SIM
72-Pin ZIP
Front View
PIN NOMENCLATURE
A0-A
19 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
NC No Connect
MODULE OPTIONS
Leadless SIM: AK6321024W
Leades ZIP: AK6321024Z
Leaded SIP: AK6321024G
PIN ASSIGNMENT
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
1NC19A137CE455 A5
2NC20A838CE3 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 DQ28 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 A19
17 A0 35 CE253 A4 71 NC
18 A7 36 CE1 54 A11 72 NC
PD0= Vss PD2= Vss
PD1= Open PD3= Open
FUNCTIONAL DIAGRAM
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
0.670
MAX
4.255
4.245
0.250
TYP
0.050
TYP
C
L
C
L
C
L
0.250
0.350
MAX
0.405
0.395
3.855
3.845
0.050
TYP 0.050
TYP
C
L
C
L
C
L
0.550
MAX
.100 x .100
ANGLE NOTCH
C
L
C
L
0.350
MAX
0.100
TYP
0.125
0.155
0.125
TYP
++
135
24664
6260
63
61
59
Top View ZIP
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
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
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:
AK6321024W-15
1 Meg x 32, 15 nSEC SRAM Module, SIM Configuration
AK6321024Z-17
1 Meg x 32, 17 nSEC SRAM Module, ZIP Configuration
