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參數資料
| 型號： | CYM1441 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 256K x 8 Static RAM Module(256K x 8 靜態RAM模塊) |
| 中文描述： | 256K × 8靜態存儲器模塊（256K × 8靜態內存模塊） |
| 文件頁數： | 1/5頁 |
| 文件大小： | 105K |
| 代理商： | CYM1441 |
256K x 8 Static RAM Module
CYM1441
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
November 1990 – Revised March 1995
1CYM1441
Features
High-density 2-megabit SRAM module
High-speed CMOS SRAMs
—Access time of 20 ns
Low active power
—5.3W (max.)
SMD technology
Separate data I/O
60-pin ZIP package
TTL-compatible inputs and outputs
Low profile
—Max. height of 0.5 in.
Small PCB footprint
—1.14 sq. in.
Functional Description
The CYM1441 is a very high performance 2-megabit static
RAM module organized as 256K words by 8 bits. The module
is constructed using eight 256K x 1 static RAMs in SOJ pack-
ages mounted onto an epoxy laminate substrate with pins.
Two chip selects (CS
L
and CS
U
) are used to independently
enable the upper and lower 4 bits of the data word. Writing to
the memory module is accomplished when the chip select
(CS) and write enable (WE) inputs are both LOW. Data on the
eight input pins (DI
0
through DI
7
) is written into the memory
location specified on the address pins (A
0
through A
17
). Read-
ing the device is accomplished by taking chip select (CS) LOW
while write enable (WE) remains inactive or HIGH. Under
these conditions, the contents of the memory location speci-
fied on the address pins will appear on the appropriate data
output pins (DO
0
through DO
7
). The data output pins remain
in a high- impedance state unless the module is selected and
write enable (WE) is HIGH.Two pins (PD
0
and PD
1
) are used
to identify module memory density in applications where alter-
nate versions of the JEDEC-standard modules can be inter-
changed.
Logic Block Diagram
Pin Configuration
1441–1
1441–2
ZIP
TopView
A
0
- A
17
WE
CS
U
CS
L
DI
4
- DI
7
DI
0
- DI
3
DO
4
- DO
7
DO
0
- DO
3
(OPEN)PD
0
NC
V
CC
DI
0
DO
0
A
0
A
2
A
4
A
6
GND
DI
1
DO
1
WE
A
9
CS
L
NC
NC
V
CC
DI
2
DO
2
A
10
A
12
A
14
A
16
NC
DI
3
DO
3
NC
NC
GND
GND
PD
1
(GND)
NC
DI
4
DO
4
NC
A
1
A
3
A
5
A
7
DI
5
DO
5
V
CC
A
8
NC
CS
U
NC
NC
DI
6
DO
6
GND
A
11
A
13
A
15
A
17
DI
7
DO
7
V
CC
NC
NC
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
256K x 1
SRAM
相關PDF資料 |
PDF描述 |
|---|---|
| CYM1464 | 512Kx8 Static RAM Module(521K x 8 靜態RAM模塊) |
| CYM1465A | 512K x 8 PDIP Static RAM |
| CYM1465ALPD-70C | 512K x 8 PDIP Static RAM |
| CYM1465ALPD-70I | 512K x 8 PDIP Static RAM |
| CYM1465ALPD-85C | 512K x 8 PDIP Static RAM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CYM1441PZ-20C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:256K x 8 Static RAM Module |
| CYM1441PZ-25C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:256K x 8 Static RAM Module |
| CYM1441PZ-35C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:256K x 8 Static RAM Module |
| CYM1441PZ-45C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:256K x 8 Static RAM Module |
| CYM1460PF-35C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 SRAM Module |
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