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參數(shù)資料
| 型號(hào)： | CY7C187A |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 64K x 1 Static RAM(64Kx1 靜態(tài) RAM) |
| 中文描述： | 64K的× 1靜態(tài)存儲(chǔ)器（64Kx1靜態(tài)RAM）的 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | CY7C187A |
64K x 1 Static RAM
CY7C187A
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
May 1986 - Revised March 1995
408-943-2600
Features
High speed
—20 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 CY7C187A is a high-performance CMOS static RAM or-
ganized as 65,536 words by 1 bit. Easy memory expansion is
provided by an active LOW chip enable (CE) and three-state
drivers. The CY7C187A has an automatic power-down fea-
ture, reducing the power consumption by 55% when deselect-
ed.
Writing to the device is accomplished when the chip enable
(CE) and write enable (WE) inputs are both LOW. Data on the
input pin (DI) 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 pins will appear on the data output (DO)
pin.
The output pin stays in high-impedance state when chip en-
able (CE) is HIGH or write enable (WE) is LOW.
The 7C187A utilizes a die coat to insure alpha immunity.
Logic Block Diagram
Pin Configurations
256 x 256
ARRAY
C187A–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
COLUMN DECODER
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
7C187A
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
21
3
4
5
6
7
8
9
2 1 22
1011 12 13
20
19
18
17
16
15
14
A
2
A
3
A
4
A
5
A
6
A
7
D
OUT
A
14
A
13
A
12
A
11
A
10
A
9
A
8
A
A
V
A1
G
C
D
W
7C187A
Top View
LCC
C187A–2
C187A–3
Selection Guide
[1]
7C187A–15
15
160
40/20
7C187A–20
20
90
40/20
7C187A–25
25
80
40/20
7C187A–35
35
80
30/20
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
Military
Military
Shaded area contains preliminary information.
Notes:
1.
For commercial specifications, see CY7C187 datasheet.
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PDF描述 |
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| CY7C187 | 64K x 1 Static RAM(64Kx1 靜態(tài) RAM) |
| CY7C188 | 32K x 9 Static RAM(32Kx9 靜態(tài) RAM) |
| CY7C197 | 256Kx1 Static RAM |
| CY7C197-12PC | 256Kx1 Static RAM |
| CY7C197-12VC | 256Kx1 Static RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C188-15VC | 制造商:Cypress Semiconductor 功能描述: |
| CY7C188-15VCT | 制造商:Cypress Semiconductor 功能描述: |
| CY7C188-20VC | 功能描述:32KX9 300 MIL ASYNCHRONOUS RAM RoHS:否 類別:集成電路 (IC) >> 存儲(chǔ)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 格式 - 存儲(chǔ)器:EEPROMs - 串行 存儲(chǔ)器類型:EEPROM 存儲(chǔ)容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-MFP 包裝:帶卷 (TR) |
| CY7C188-20VCT | 制造商:Rochester Electronics LLC 功能描述:256K (32K X 9)- FAST ASYNCH SRAM - Tape and Reel |
| CY7C188-25VC | 制造商:Rochester Electronics LLC 功能描述:256K (32K X 9)- FAST ASYNCH SRAM - Bulk 制造商:Cypress Semiconductor 功能描述: |
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