CY7C148-35PC

CY7C148-35PC Datasheet

CY7C148

Part	Datasheet
CY7C148-35PC	CY7C148-35PC (pdf)

PDF Datasheet Preview
CY7C148 1Kx4 Static RAM • Automatic power-down when deselected • CMOS for optimum speed/power • 35-ns access time • Low active power 440 mW • Low standby power 7C148 55 mW all others • 5-volt power supply  10% tolerance, both commercial and military • TTL-compatible inputs and outputs Functional Description The CY7C148 is a high-performance CMOS static RAMs organized as 1024 by 4 bits. Easy memory expansion is provided by an active LOW chip select CS input and three-state outputs. The CY7C148 remains in a low-power mode as long as the device remains unselected i.e., CS is HIGH, thus reducing the average power requirements of the device. Writing to the device is accomplished when the chip select CS and write enable WE inputs are both LOW. Data on the I/O pins I/O0 through I/O3 is written into the memory locations specified on the address pins A0 through A9 . Reading the device is accomplished by taking chip select CS 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 I/O pins. The I/O pins remain in a high-impedance state when chip select CS is HIGH or write enable WE is LOW. Logic Block Diagram INPUTBUFFER ROW DECODER SENSE AMP I/O0 64 x 64 I/O1 ARRAY I/O2 I/O3 COLUMN DECODER POWER DOWN 7C148 CS WE A3 A2 A1 A0 • San Jose, CA 95134-1709 • 408-943-2600 [+] Feedback Pin Configuration DIP Top View A6 1 A5 2 A4 3 A3 4 A0 5 A1 6 A2 7 CS 8 GND 9 18 VCC 17 A7 16 A8 15 A9 14 I/O 0 13 I/O 1 12 I/O 2 11 I/O 3 10 WE Selection Guide Description Maximum Access Time ns Maximum Operating Current mA Maximum Standby Current mA Commercial 35 80 10 CY7C148 Page 2 of 10 [+] Feedback CY7C148 Maximum Ratings Exceeding the maximum ratings may impair the useful life of the device. These user guidelines are not tested. Ordering Information Speed ns Ordering Code Package Name Package Type 18-Lead 300-Mil Molded DIP Operating Range Commercial Ordering Code Definitions CY 7 C 1 48 - 35 P C Temperature Range C = Commercial Package Type P 18-Lead Molded DIP Access time in ns 48 = 4-Kbit density with Data width x 4 bits 1 = Fast Asynchronous SRAM family Technology Code C = CMOS 7 = SRAM CY = Cypress Page 8 of 10 [+] Feedback Figure 18-Lead 300-Mil Molded DIP P3 CY7C148 51-85010 *C Page 9 of 10 [+] Feedback CY7C148 Document History Page Document Title CY7C148 1K x 4 Static RAM Document Number 38-05059 ECN No. Issue Date Orig. of Change 110170 09/29/01 2894016 03/19/2010 VKN 3051744 10/07/2010 PRAS Description of Change Change from Spec number 38-00031 to 38-05059 Removed 25 ns speed bin Removed Military product information Changed the description of IIX from Input Load Current to Input Leakage Current in DC Electrical Characteristics table Removed IOS parameter from DC Electrical Characteristics table Removed 18-pin 300-mil CerDIP and 18-pin Rectangular Leadless Chip Carrier packages Updated ordering Information Table Removed inactive part CY7C149-45PC from all places it appeared. Added Ordering Code Definition Updated Package Diagram Sales, Solutions, and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations. Products Automotive Clocks & Buffers Interface Lighting & Power Control Memory Optical & Image Sensing PSoC Touch Sensing USB Controllers Wireless/RF cypress.com/go/automotive cypress.com/go/clocks cypress.com/go/interface cypress.com/go/powerpsoc cypress.com/go/plc cypress.com/go/memory cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB cypress.com/go/wireless PSoC Solutions psoc.cypress.com/solutions PSoC 1 \| PSoC 3 \| PSoC 5 Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code software and/or firmware is owned by Cypress Semiconductor Corporation Cypress and is protected by and subject to worldwide patent protection United States and foreign , United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. All products and company names mentioned in this document may be the trademarks of their respective holders. Page 10 of 10 [+] Feedback

PDF Datasheet Preview

CY7C148
1Kx4 Static RAM
• Automatic power-down when deselected
• CMOS for optimum speed/power
• 35-ns access time
• Low active power
440 mW
• Low standby power 7C148
55 mW all others
• 5-volt power supply  10% tolerance, both commercial and
military
• TTL-compatible inputs and outputs

Functional Description

The CY7C148 is a high-performance CMOS static RAMs organized as 1024 by 4 bits. Easy memory expansion is provided by an active LOW chip select CS input and three-state outputs. The CY7C148 remains in a low-power mode as long as the device remains unselected i.e., CS is HIGH, thus reducing the average power requirements of the device.

Writing to the device is accomplished when the chip select CS and write enable WE inputs are both LOW. Data on the I/O pins I/O0 through I/O3 is written into the memory locations specified on the address pins A0 through A9 .

Reading the device is accomplished by taking chip select CS 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 I/O pins.

The I/O pins remain in a high-impedance state when chip select CS is HIGH or write enable WE is LOW.

Logic Block Diagram

INPUTBUFFER

ROW DECODER SENSE AMP

I/O0
64 x 64

I/O1

ARRAY

I/O2

I/O3

COLUMN DECODER

POWER

DOWN 7C148

CS WE

A3 A2 A1 A0
• San Jose, CA 95134-1709
• 408-943-2600
[+] Feedback

Pin Configuration

DIP Top View

A6 1 A5 2 A4 3 A3 4 A0 5 A1 6 A2 7 CS 8

GND 9
18 VCC 17 A7 16 A8 15 A9 14 I/O 0 13 I/O 1 12 I/O 2 11 I/O 3 10 WE

Selection Guide

Description Maximum Access Time ns Maximum Operating Current mA Maximum Standby Current mA

Commercial
35 80 10

CY7C148

Page 2 of 10 [+] Feedback

CY7C148

Maximum Ratings

Exceeding the maximum ratings may impair the useful life of the device. These user guidelines are not tested.
Ordering Information

Speed ns
Ordering Code

Package Name

Package Type
18-Lead 300-Mil Molded DIP

Operating Range

Commercial
Ordering Code Definitions CY 7 C 1 48 - 35 P C

Temperature Range C = Commercial Package Type P 18-Lead Molded DIP Access time in ns 48 = 4-Kbit density with Data width x 4 bits 1 = Fast Asynchronous SRAM family Technology Code C = CMOS 7 = SRAM CY = Cypress

Page 8 of 10 [+] Feedback

Figure 18-Lead 300-Mil Molded DIP P3

CY7C148
51-85010 *C

Page 9 of 10 [+] Feedback

CY7C148

Document History Page

Document Title CY7C148 1K x 4 Static RAM Document Number 38-05059

ECN No.

Issue Date

Orig. of Change
110170 09/29/01
2894016 03/19/2010 VKN
3051744 10/07/2010 PRAS

Description of Change

Change from Spec number 38-00031 to 38-05059
Removed 25 ns speed bin Removed Military product information Changed the description of IIX from Input Load Current to Input Leakage Current in DC Electrical Characteristics table Removed IOS parameter from DC Electrical Characteristics table Removed 18-pin 300-mil CerDIP and 18-pin Rectangular Leadless Chip Carrier packages Updated ordering Information Table
Removed inactive part CY7C149-45PC from all places it appeared. Added Ordering Code Definition Updated Package Diagram

Sales, Solutions, and Legal Information

Worldwide Sales and Design Support

Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at Cypress Locations.

Products Automotive Clocks & Buffers Interface Lighting & Power Control

Memory Optical & Image Sensing PSoC Touch Sensing USB Controllers Wireless/RF
cypress.com/go/automotive cypress.com/go/clocks
cypress.com/go/interface cypress.com/go/powerpsoc
cypress.com/go/plc cypress.com/go/memory
cypress.com/go/image cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB
cypress.com/go/wireless

PSoC Solutions psoc.cypress.com/solutions PSoC 1 | PSoC 3 | PSoC 5

Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Any Source Code software and/or firmware is owned by Cypress Semiconductor Corporation Cypress and is protected by and subject to worldwide patent protection United States and foreign , United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress.

Disclaimer CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement.

All products and company names mentioned in this document may be the trademarks of their respective holders.

Page 10 of 10
[+] Feedback

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CY7C148-35PC Datasheet file may be downloaded here without warranties.

Datasheet ID: CY7C148-35PC 508046