Cypress CY7C1007B manual Features, Functional Description, Logic Block Diagram Pin Configuration

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CY7C107B

CY7C1007B

Features

High speed

tAA = 12 ns

CMOS for optimum speed/power

Automatic power-down when deselected

TTL-compatible inputs and outputs

Functional Description

The CY7C107B and CY7C1007B are high-performance CMOS static RAMs organized as 1,048,576 words by 1 bit. Easy memory expansion is provided by an active LOW Chip Enable (CE) and three-state drivers. These devices have an automatic power-down feature that reduces power consump- tion by more than 65% when deselected.

1M x 1 Static RAM

Writing to the devices is accomplished by taking Chip Enable (CE) and Write Enable (WE) inputs LOW. Data on the input pin (DIN) is written into the memory location specified on the ad- dress pins (A0 through A19).

Reading from the devices is accomplished by taking Chip En- able (CE) LOW while Write Enable (WE) remains HIGH. Under these conditions, the contents of the memory location speci- fied by the address pins will appear on the data output (DOUT) pin.

The output pin (DOUT) is placed in a high-impedance state when the device is deselected (CE HIGH) or during a write operation (CE and WE LOW).

The CY7C107B is available in a standard 400-mil-wide SOJ; the CY7C1007B is available in a standard 300-mil-wide SOJ.

Logic Block Diagram

Pin Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUT BUFFER

 

 

A0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DECODER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

 

 

 

 

 

 

 

512x2048

 

 

 

 

A5

 

 

 

 

 

 

 

 

 

 

 

 

ROW

 

 

 

 

 

 

ARRAY

 

 

 

 

 

 

 

 

 

 

 

 

 

A7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COLUMN

 

 

 

 

 

 

 

 

 

 

 

 

DECODER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9 10

11

12

13

14

15

16

17

18

19

 

 

 

 

A A A A A A A A A A A

 

 

 

DIN

AMPS

 

SENSE

DOUT

 

POWER

 

DOWN

CE

 

 

WE

 

107B-1

 

 

SOJ

 

 

Top View

 

A10

1

28

VCC

A11

2

27

A

A12

3

26

9

A

A13

 

 

8

4

25

A

A14

 

24

7

5

A6

23

A15

6

A5

22

NC

7

A4

21

A16

8

NC

20

A17

9

A3

 

A18

10

19

A2

A19

11

18

A1

DOUT

12

17

A0

WE

13

16

DIN

GND

14

15

CE

 

 

 

107B-2

Selection Guide

 

7C107B-12

7C107B-15

7C107B-20

7C107B-25

7C107B-35

 

7C1007B-12

7C1007B-15

7C1007B-20

7C1007B-25

7C1007B-35

 

 

 

 

 

 

Maximum Access Time (ns)

12

15

20

25

35

 

 

 

 

 

 

Maximum Operating

90

80

75

70

60

Current (mA)

 

 

 

 

 

 

 

 

 

 

 

Maximum CMOS Standby

2

2

2

2

2

Current SB2 (mA)

 

 

 

 

 

 

 

 

 

 

 

Cypress Semiconductor Corporation • 3901 North First Street

• San Jose • CA 95134 • 408-943-2600

Document #: 38-05030 Rev. **

Revised September 7, 2001

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Contents Logic Block Diagram Pin Configuration FeaturesFunctional Description Selection GuideMaximum Ratings Electrical Characteristics Over the Operating RangeOperating Range 7C107B-25 7C107B-35 Capacitance4Parameter Description Test Conditions Min Max Parameter Description Test Conditions Max UnitAC Test Loads and Waveforms Switching Characteristics5 Over the Operating RangeParameter Description Min Max Read Cycle No Switching WaveformsWrite Cycle No CE Controlled13 High Impedance Data OUT Data Undefined Write Cycle No WE Controlled13Truth Table Package DiagramsOrdering Information Lead 300-Mil Molded SOJ Change Description of Change REV ECN no

CY7C1007B, CY7C107B specifications

Cypress Semiconductor's CY7C107B and CY7C1007B are high-performance static random-access memory (SRAM) devices designed for demanding applications that require fast access times, low power consumption, and high reliability. Both of these memory chips are particularly suitable for use in a variety of electronic systems, including telecommunications, networking, industrial automation, and consumer electronics.

The CY7C107B is a 1 megabit SRAM, while the CY7C1007B is a larger 256 kilobit SRAM. They belong to the Cypress family of asynchronous SRAMs, which are known for their ease of integration into existing systems. One of the main features of these devices is their high-speed operation, with access times that can be as low as 10 nanoseconds. This rapid access allows for quick read and write cycles, making them ideal for applications where speed is critical.

Both memory chips are available in a variety of package options, including 28-pin DIP and 32-pin SOP, allowing for flexible use in different system designs. The CY7C107B and CY7C1007B also employ a dual-port architecture, which enhances their functionality by allowing multiple devices or processors to access the memory simultaneously without conflict. This characteristic is especially beneficial in systems requiring high-throughput data handling, such as video processing or high-speed networking.

Power consumption is another significant aspect of these SRAM devices. They are designed to operate efficiently, with low standby current and minimal active power usage. This makes them suitable for battery-powered and energy-sensitive applications, helping to extend the operating life of such devices.

In terms of reliability, the CY7C107B and CY7C1007B are built using advanced CMOS technology, which not only enhances performance but also increases durability and longevity. These SRAMs are capable of withstanding environmental stresses, thus ensuring consistent performance over time. Furthermore, they incorporate built-in data integrity features to protect against soft errors caused by radiation or other disturbances.

Overall, the Cypress CY7C107B and CY7C1007B SRAMs are robust and efficient solutions for high-speed memory needs. Their combination of fast access times, low power consumption, dual-port capabilities, and reliability makes them excellent choices for a wide range of applications in a rapidly evolving tech landscape. With their proven performance in various sectors, these memory chips continue to be a popular choice among engineers and designers seeking reliable memory solutions.