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參數資料
| 型號： | CY7C168A-45 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 4Kx4 RAM |
| 中文描述： | 4Kx4內存 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 165K |
| 代理商： | CY7C168A-45 |
4Kx4 RAM
CY7C168A
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
February 3, 2000
Features
Automatic power-down when deselected
CMOS for optimum speed/power
High speed
—t
AA
= 15 ns
Low active power
—633 mW
Low standby power
—110 mW
TTL-compatible inputs and outputs
V
IH
of 2.2V
Capable of withstanding greater than 2001V electrostat-
ic discharge
Functional Description
The CY7C168A is a high-performance CMOS static RAM or-
ganized as 4096 by 4 bits. Easy memory expansion is provided
by an active LOW Chip Enable (CE) and three-state drivers.
The CY7C168A has an automatic power-down feature, reduc-
ing the power consumption by 77% when deselected.
Writing to the device is accomplished when the Chip Select
(CE) and Write Enable (WE) inputs are both LOW. Data on the
four data input/output pins (I/O
0
through I/O
3
) is written into the
memory location specified on the address pins (A
0
through
A
11
).
Reading the device is accomplished by taking the Chip Enable
(CE) LOW, while Write Enable (WE) remains HIGH. Under
these conditions, the contents of the location specified on the
address pins will appear on the four data input/output pins
(I/O
0
through I/O
3
).
The input/output pins remain in a high-impedance state when
Chip Enable (CE) is HIGH or Write Enable (WE) is LOW.
A die coat is used to insure alpha immunity.
Logic Block Diagram
Pin Configurations
128 x 128
ARRAY
C168A-1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
18
17
16
15
Top View
DIP/SOJ
7C168A
\
A
1
A
2
A
3
A
4
A
5
A
6
A
8
A
9
A
0
COLUMN
DECODER
R
S
INPUTBUFFER
POWER
DOWN
(7C168A)
WE
CE
I/O
0
A
5
A
6
A
7
A
8
A
9
A
10
A
11
CE
WE
GND
V
CC
A
3
A
2
A
1
A
0
I/O
0
I/O
1
I/O
2
I/O
3
C168A-2
I/O
1
A
10
A
11
A
4
I/O
2
I/O
3
A
7
20
19
Selection Guide
7C168A-15
15
115
-
7C168A-20
20
90
100
7C168A-25
25
90
100
7C168A-35
35
90
100
7C168A-45
45
90
100
Maximum Access Time (ns)
Maximum Operating
Current (mA)
Commercial
Military
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