AK632512W_09 Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – Static Random Access Memory

ACCUTEK
MICROCIRCUIT CORPORATION
AK632512W / AK632512Z
524,288 x 32 Bit CMOS / BiCMOS
Static Random Access Memory
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, PD₁, PD₂ and PD₃ minimizes 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
· TTL-compatible inputs and outputs
· 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)
· Single 5 volt power supply - AK632512W, AK632512Z
· Single 3.3 volt power supply - AK632512W/3.3,
AK632512Z/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
PIN ASSIGNMENT
FUNCTIONAL DIAGRAM
A0 - A18
CE1 - CE4
DQ1 - DQ32
OE
PD0 - PD3
Vcc
Vss
WE
Address Inputs
Chip Enable
Data In/Data Out
Output Enable
Presence Detect
5v Supply
Ground
Write Enable
MODULE OPTIONS
Leadless SIM: AK632512W
Leaded SIP: AK632512G
Leaded ZIP: AK632512Z
PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL
1
NC 19 A1 37 CE4 55 A5
2
NC 20 A8 38 CE3 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 CE2 53 A4 71 NC
18 A7 36 CE1 54 A11 72 NC
PD0 = Open
PD1 = Open
PD2 = Vss
PD3 = 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