Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK62464 SRAM Module consists of fast high perfor-
mance SRAMs mounted on a low profile, 64 pin ZIP Board. The
module utilizes four 28 pin 64K x 4 SRAMs in 300 mil SOJ packages
and three decoupling capacitors mounted on the top side and two
28 pin 64K x 4 SRAMs in 300 mil SOJ packages and three decoup-
ling capacitors mounted on the bottom side of a printed circuit
board.
The SRAMs used have common I/O functions and single output en-
able functions. Also, three separate chip select (CE) connections
are used to independently enable the three bytes. The modules can
be supplied in a variety of access time values from 8nSEC to
20nSEC in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.500 inch to provide for the lowest height off the board. The
modules conform to JEDEC - standard sizes and pin-out configura-
tions. Using two pins for module memory density identification, PD
0
and PD
1
, minimizes interchangeability and design considerations
when changing from one module size to the other in customer appli-
cations.
64
AK62464Z
65,536 x 24 Bit CMOS/BiCMOS
Static Random Access Memory
64-Pin ZIP
Front View
1
32
33
64
Rear View
33
32
1
FEATURES
·
65,536 x 24 bit organization
·
JEDEC Standard 64 pin ZIP format
·
Common I/O, single OE functions with four separate chip
selects (CE)
·
Low height 0.500 inch maximum
·
Upward compatible with
·
Presence Detect, PD
0
and PD
1
for identifying module density
·
Fast Access Times range from 8 nSEC BiCMOS to 20 nSEC
CMOS
·
TTL-compatible inputs and outputs
·
Single +5 Volt (±10%) power supply
·
Operating temperature range in free air, 0
0
C to 70
0
C
·
Power
900 mA Max Active (12 nS)
840 mA Max Active (15 nS)
780 mA Max Active (20 nS)
240 mA Max Standby (Cycling)
12 mA Max Standby (f=0MHZ)
PIN NOMENCLATURE
A
0
- A
15
CE
1
- CE
3
DQ
1
- DQ
24
OE
PD
0
- PD
1
Vcc
Vss
WE
NC
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
5v Supply
Ground
Write Enable
No Connect
PIN ASSIGNMENT
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
PIN #
SYMBOL
FUNCTIONAL DIAGRAM
NC
CE3
NC
NC
OE
Vss
DQ13
DQ17
DQ14
DQ18
DQ15
DQ19
DQ16
DQ20
A3
A10
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
A4
A11
A5
A12
Vcc
A
13
A6
DQ21
NC
DQ22
NC
DQ23
NC
DQ24
NC
Vss
1
2
3
4
5
6
7
8
9
10
11
12
Vss
PD0
PD1
DQ1
NC
DQ2
NC
DQ3
NC
DQ4
NC
Vcc
A0
A7
A1
A8
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A2
A9
DQ9
DQ5
DQ10
DQ6
DQ11
DQ7
DQ12
DQ8
Vss
WE
A15
A14
CE2
CE1
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MODULE OPTIONS
Leadless ZIP:
AK62464Z
13
14
15
16
PD
0
= Open
PD
1
= Vss
ORDERING INFORMATION
Position
1
2
MECHANICAL DIMENSIONS
Inches
7
8
1
2
3
4
5
6
PART NUMBER CODING INTERPRETATION
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 0
0
C to +70
0
C
M = Military Equivalent Screened
(-55
0
C to +125
0
C)
I = Industrial Temperature Tested
(-45
0
C to +85
0
C)
X = Burned In
Speed (first two significant digits)
DRAMS
SRAMS
50 = 50 nS
12 = 12 nS
60 = 60 nS
15 = 15 nS
70 = 70 nS
20 = 20 nS
80 = 80 nS
25 = 25 nS
Top View ZIP
1
2
3
4
5
6
3
59
60
61
62
64
63
4
.050 x .050
ANGLE NOTCH
0.125
0.155
5
0.500
MAX
1
C
L
0.120
0.130
6
CC
LL
7
0.050
TYP
3.595
3.605
C C
L L
8
0.100
TYP
64
The numbers and coding on this page do not include all variations
available but are shown as examples of the most widely used varia-
tions. Contact Accutek if other information is required.
0.100
TYP
EXAMPLES:
AK62464Z-12
64K x 24, 12 nSEC SRAM Module, ZIP Configuration
ACCUTEK MICROCIRCUIT CORPORATION
BUSINESS CENTER at NEWBURYPORT
2 NEW PASTURE ROAD, SUITE 1
NEWBURYPORT, MA 01950-4054
PHONE: 978-465-6200 FAX: 978-462-3396
E-mail: accutek@seacoast.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 im-
plied. 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.
C C
L L
0.350
MAX
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