AK632512AW Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – 524,288 x 32 Bit CMOS / BiCMOS Static Random Access Memory

Accutek
Microcircuit
Corporation
DESCRIPTION
The Accutek AK632512AW SRAM Module consists of fast high per-
formance SRAMs mounted on a low height, 64 pin SIM Board. The
module utilizes four 36 pin 512K x 8 SRAMs in 400 mil SOJ pack-
ages and four decoupling capacitors mounted two on the front side
and two on the back 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 to provide for the lowest height off the board. The
module conforms to JEDEC-standard size. The Presence Detect
feature has been disabled on this 64 pin module. The customer
must jumper his board to provide density identification. The avail-
able 72 pin module has the Presence Detect feature operational.
FEATURES
· 524,288 x 32 bit organization
· Similar to JEDEC standard 64 pin SIM format except that A₁₈
replaces PD₁ on Pin #3
· 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 maximum
· Power:
720mA Max Active (20 nSEC)
760mA Max Active (15 nSEC)
800mA Max Active (12 nSEC)
200mA Max Standby
AK632512AW - 64 Pin Version
524,288 x 32 Bit CMOS / BiCMOS
Static Random Access Memory
Front View
1
32 33
64
Back View
64
33 32
1
· Presence Detect, PD₀ is open 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 power supply - AK632512AW
· Single 3.3 volt power supply - AK632512AW/3.3
· Operating free air temperature 0⁰ to 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.
PIN NOMENCLATURE
A0 - A18
CE1 - CE4
DQ1 - DQ32
OE
PD0
Vcc
Vss
WE
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
5v Supply
Ground
Write Enable
MODULE OPTIONS
Leadless SIM: AK632512AW
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
1
Vss 17
A2
33 CE4 49
A4
2 PD0 18 A9 34 CE3 50 A11
3
A18 19 DQ13 35
A17
51
A5
4 DQ1 20 DQ5 36 A16 52 A12
5 DQ9 21 DQ14 37 OE 53 Vcc
6 DQ2 22 DQ6 38 Vss 54 A13
7 DQ10 23 DQ15 39 DQ25 55 A6
8 DQ3 24 DQ7 40 DQ17 56 D21
9 DQ11 25 DQ16 41 DQ26 57 DQ29
10 DQ4 26 DQ8 42 DQ18 58 DQ22
11 DQ12 27 Vss 43 DQ27 59 DQ30
12 Vcc 28 WE 44 DQ19 60 DQ23
13 A0 29 A15 45 DQ28 61 DQ31
14 A7 30 A14 46 DQ20 62 DQ24
15 A1 31 CE2 47 A3 63 DQ32
16 A8 32 CE1 48 A10 64 Vss
PD₀ = Open
A0 - A18 +
WE +
OE ₊
A0 - A18
19
* WE
DQ1 - DQ8
* OE
CE
CE1 +
A0 - A18
* WE
* OE
DQ1 - DQ8
CE
CE2 +
A0 - A18
* WE
* OE
DQ1 - DQ8
CE
CE3 +
A0 - A168
* WE
* OE
DQ1 - DQ8
CE
CE4 +
+ DQ1 - DQ8
+ DQ9 - DQ16
+ DQ17 - DQ24
+ DQ25 - DQ32