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參數資料
| 型號： | CY7C187 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 64K x 1 Static RAM(64Kx1 靜態 RAM) |
| 中文描述： | 64K的× 1靜態存儲器（64Kx1靜態RAM）的 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 136K |
| 代理商： | CY7C187 |
64K x 1 Static RAM
CY7C187
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
October 4, 1999
Features
High speed
—15 ns
CMOS for optimum speed/power
Low active power
—495 mW
Low standby power
—220 mW
TTL compatible inputs and outputs
Automatic power-down when deselected
Functional Description
The CY7C187 is a high-performance CMOS static RAM orga-
nized as 65,536 words x 1 bit. Easy memory expansion is pro-
vided by an active LOW Chip Enable (CE) and three-state driv-
ers. The CY7C187 has an automatic power-down feature,
reducing the power consumption by 56% when deselected.
Writing to the device is accomplished when the Chip Enable
(CE) and Write Enable (WE) inputs are both LOW. Data on the
input pin (D
IN
) is written into the memory location specified on
the address pins (A
0
through A
15
).
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 memory location speci-
fied on the address pin will appear on the data output (D
OUT
)
pin.
The output pin stays in high-impedance state when Chip En-
able (CE) is HIGH or Write Enable (WE) is LOW.
The CY7C187 utilizes a die coat to insure alpha immunity.
Logic Block Diagram
Pin Configurations
256 x 256
ARRAY
C187–1
A
12
A
13
A
14
A
15
A
0
A
1
A
2
A
3
A
4
A
5
A
1
A
1
COLUMNDECODER
R
S
INPUT BUFFER
POWER
DOWN
DI
DO
CE
WE
A
7
A
6
A
9
A
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
18
17
16
15
19
22
21
20
Top View
DIP
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
D
OUT
WE
GND
CE
V
CC
A
15
A
14
A
13
A
12
A
11
A
10
A
9
A
8
D
IN
C187–2
WE
GND
1
2
3
4
5
6
7
8
9
10
11
12
14
13
15
16
20
19
18
17
21
24
23
22
Top View
SOJ
A
0
A
1
A
2
A
3
A
4
A
5
NC
A
6
A
7
CE
V
CC
A
15
A
14
A
13
A
12
NC
A
11
A
10
A
9
A
8
D
IN
D
OUT
C187–3
Selection Guide
[1]
7C187-15
7C187-20
7C187-25
7C187-35
Maximum Access Time (ns)
15
20
25
35
Maximum Operating Current (mA)
90
80
70
70
Maximum Standby Current (mA)
40/20
40/20
20/20
20/20
Note:
1.
For military specifications, see the CY7C187A datasheet.
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相關代理商/技術參數 |
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|---|---|
| CY7C187-15PC | 制造商:Cypress Semiconductor 功能描述:SRAM Chip Async Dual 5V 64K-Bit 64K x 1 15ns 22-Pin PDIP |
| CY7C187-15PXC | 功能描述:靜態隨機存取存儲器 64Kx1 22 PIN 靜態隨機存取存儲器 RoHS:否 制造商:Cypress Semiconductor 存儲容量:16 Mbit 組織:1 M x 16 訪問時間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray |
| CY7C187-15VC | 制造商:Cypress Semiconductor 功能描述:SRAM Chip Async Dual 5V 64K-Bit 64K x 1 15ns 24-Pin SOJ 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C187-15VXC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Cypress Semiconductor 功能描述: |
| CY7C187-20PC | 制造商:Rochester Electronics LLC 功能描述:64K (64K X 1)- FAST ASYNCH SRAM - Bulk 制造商:Cypress Semiconductor 功能描述: |
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