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CY62138CV33LL-70BVI PDF预览

CY62138CV33LL-70BVI

更新时间: 2024-11-23 22:14:27
品牌 Logo 应用领域
赛普拉斯 - CYPRESS /
页数 文件大小 规格书
12页 236K
描述
2M (256K x 8) Static RAM

CY62138CV33LL-70BVI 数据手册

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®
®
CY62138CV25/30/33 MoBL  
CY62138CV MoBL  
2M (256K x 8) Static RAM  
bits. This device features advanced circuit design to provide  
ultra-low active current. This is ideal for providing More Battery  
Life(MoBL®) in portable applications. The device also has  
an automatic power-down feature that significantly reduces  
power consumption by 80% when addresses are not toggling.  
The device can be put into standby mode reducing power  
consumption by more than 99% when deselected (CE1 HIGH  
or CE2 LOW).  
Features  
Very high speed: 55 ns and 70 ns  
Voltage range:  
CY62138CV25: 2.2V2.7V  
CY62138CV30: 2.7V3.3V  
CY62138CV33: 3.0V3.6V  
Writing to the device is accomplished by taking Chip Enable 1  
(CE1) and Write Enable (WE) inputs LOW and Chip Enable 2  
(CE2) HIGH. Data on the eight I/O pins (I/O0 through I/O7) is  
then written into the location specified on the address pins (A0  
through A17).  
CY62138CV: 2.7V3.6V  
Pin-compatible with CY62138V  
Ultra low active power  
Typical active current: 1.5 mA @ f = 1 MHz  
Reading from the device is accomplished by taking Chip  
Enable 1 (CE1) and Output Enable (OE) LOW while forcing  
Write Enable (WE) and Chip Enable 2 (CE2) HIGH. Under  
these conditions, the contents of the memory location  
specified by the address pins will appear on the I/O pins.  
Typical active current: 5.5 mA @ f = fmax (70-ns  
speed)  
Low standby power  
Easy memory expansion with CE1, CE2, and OE  
features  
The eight input/output pins (I/O0 through I/O7) are placed in a  
high-impedance state when the device is deselected (CE1  
HIGH or CE2 LOW), the outputs are disabled (OE HIGH), or  
during a write operation (CE1 LOW, CE2 HIGH and WE LOW).  
See the truth table at the back of this data sheet for a complete  
description of read and write modes.  
Automatic power-down when deselected  
CMOS for optimum speed/power  
Packages offered in a 36-ball FBGA  
Functional Description[1]  
The CY62138CV25/30/33 and CY62138CV are high-perfor-  
mance CMOS static RAMs organized as 256K words by eight  
Logic Block Diagram  
I/O  
I/O  
I/O  
I/O  
I/O  
I/O  
I/O  
0
1
2
3
4
5
Data in Drivers  
A
0
A
1
A
2
3
4
A
A
A
5
A
256K x 8  
ARRAY  
6
A
7
A
8
A
9
A
10  
A
11  
6
7
POWER  
DOWN  
CE  
CE  
COLUMN  
DECODER  
1
2
I/O  
WE  
OE  
Note:  
1. For best practice recommendations, please refer to the Cypress application note System Design Guidelineson http://www.cypress.com.  
Cypress Semiconductor Corporation  
Document #: 38-05200 Rev. *D  
3901 North First Street  
San Jose  
CA 95134  
408-943-2600  
Revised September 20, 2002  

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