AK616256D_13 Datasheet, PDF (1/2 Pages) ACCUTEK MICROCIRCUIT CORPORATION – Static Ran dom Ac cess Memory

ACCUTEK
MICROCIRCUIT CORPORATION
DESCRIPTION
The Accutek AK616256D SRAM Module consists of four fast high
performance SRAMs mounted on a low profile 48 pin DIP Board.
The module utilizes four 28 pin 256K x 4 SRAMs in SOJ packages
and four decoupling capacitors mounted on a printed circuit board.
The SRAMs used have common I/O functions and single output en-
able functions. Also, four separate chip select (CS) connections are
used to independently enable the four chips. The modules can be
supplied in a variety of access time values from 12nSEC to 45nSEC
in CMOS or BiCMOS technology.
The Accutek module is designed to have a maximum seated height
of 0.230 inch to provide for the lowest height off the board. Each
conforms to JEDEC standard sizes and pin-out configurations.
FEATURES
• 262,144 x 16 bit organization
• JEDEC Standardized 48 Pin DIP
• Common I/O with four separate chip selects (CS)
• Low height 0.230 inch DIP maximum
• Fast access times range from 12 nSEC BiCMOS to 45nSEC
CMOS
• TTL-compatible inputs and outputs
• Single 5 volt power supply - AK616256D
• Single 3.3 volt power supply - AK616256D-3.3
• Operating free air temperature 0⁰C to 70⁰C
AK616256D
262,144 x 16 Bit CMOS/BiCMOS
Static Random Access Memory
ELECTRICAL SPECIFICATIONS
Timing diagrams and basic electrical characteristics are those of
the standard 256K x 4 SRAMs used to construct these modules.
Accutek's module design allows the flexibility of selecting industry-
compatible 256K x 4 SRAMs from several semiconductor
manufactrurers.
PIN NOMENCLATURE
A0 - A17
CS1 - CS4
DQ0 - DQ15
WEL - WEU
Vcc
Vss
NC
Address Inputs
Chip Select
Data In/Date Out
Write Enable
5v Supply
Ground
No Connect
MODULE OPTIONS
DIP: AK616256D
PIN ASSIGNMENTA16
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
SYMBOL
GND
NC
A0
A1
A2
WEL
CS2
D4
D5
D6
D7
GND
PIN #
13
14
15
16
17
18
19
20
21
22
23
24
SYMBOL
A9
A10
A11
A12
A13
WEU
CS4
D12
D13
D14
D15
Vcc
PIN #
25
26
27
28
29
30
31
32
33
34
35
36
SYMBOL
GND
NC
A17
A16
A15
A14
CS3
D11
D10
D9
D8
Vcc
PIN #
37
38
39
40
41
42
43
44
45
46
47
48
SYMBOL
A8
A7
A6
A5
A4
A3
CS1
D3
D2
D1
D0
Vcc
EXAMPLES
AK616256D-12
256K x 16, 12 nSEC SRAM Module, DIP
AK616256D-15
256K x 16, 15nSEC SRAM Module, DIP