CY7C145, CY7C144

Figure 17. Typical DC and AC Characteristics

NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE

 

1.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SB

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICC

 

 

 

 

 

 

 

 

, I

 

 

 

 

 

 

 

 

 

 

 

 

CC

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ISB3

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

NORMALIZED

0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.0

 

 

 

 

 

 

 

 

 

 

 

 

 

4.0

4.5

5.0

5.5

6.0

 

NORMALIZED SUPPLY CURRENT

 

 

 

vs. AMBIENT TEMPERATURE

 

(mA)

200

 

1.2

ICC

 

 

 

 

 

SB

1.0

 

OUTPUT SOURCE CURRENT

 

 

 

160

I

 

 

,

 

 

 

CC

0.8

ISB3

 

 

NORMALIZED I

 

120

 

 

 

0.6

VCC = 5.0V

 

 

 

 

80

0.4

VIN = 5.0V

 

 

 

 

0.2

 

 

40

 

 

 

0.6

25

125

0

 

55

 

 

OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGE

 

 

 

VCC = 5.0V

 

 

 

 

TA = 25°C

 

0

1.0

2.0

3.0

4.0

5.0

SUPPLY VOLTAGE (V)

AMBIENT TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

NORMALIZED ACCESS TIME vs. SUPPLY VOLTAGE

 

1.4

 

 

 

 

AA

1.3

 

 

 

 

 

 

 

 

 

t

 

 

 

 

 

NORMALIZED

1.2

 

 

 

 

1.1

 

 

 

 

1.0

 

 

TA = 25°C

 

 

 

 

 

 

0.9

 

 

 

 

 

0.8

4.5

5.0

5.5

6.0

 

4.0

NORMALIZED ACCESS TIME vs. AMBIENT TEMPERATURE

 

1.6

 

 

AA

1.4

 

 

t

 

 

 

NORMALIZED

1.2

 

 

1.0

 

 

 

 

VCC = 5.0V

 

0.8

 

 

 

0.6

25

125

 

55

OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE

(mA)

140

 

 

 

 

 

120

 

 

 

 

 

CURRENT

 

 

 

 

 

100

 

 

 

 

 

80

 

 

 

 

 

SINK

60

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

40

 

 

 

 

 

20

 

 

VCC = 5.0V

 

0

 

 

TA = 25°C

 

 

0.0

1.0

2.0

3.0

4.0

5.0

SUPPLY VOLTAGE (V)

TYPICAL POWER-ON CURRENT vs. SUPPLY VOLTAGE

 

1.00

 

 

 

 

 

 

PC

 

 

 

 

 

 

 

t

0.75

 

 

 

 

 

 

NORMALIZED

 

 

 

 

 

 

0.50

 

 

 

 

 

 

0.25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.0

0

1.0

2.0

3.0

4.0

5.0

SUPPLY VOLTAGE (V)

AMBIENT TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

 

TYPICAL ACCESS TIME CHANGE

 

NORMALIZED ICC vs. CYCLE TIME

 

vs. OUTPUT LOADING

 

 

 

 

30.0

 

 

 

 

 

 

1.25

VCC = 5.0V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25.0

 

 

 

 

 

CC

 

TA = 25°C

 

 

(ns)

20.0

 

 

 

 

 

I

1.0

VIN = 5.0V

 

 

AA

 

 

 

 

 

NORMALIZED

 

 

 

 

 

 

 

 

 

 

 

 

 

DELTA t

15.0

 

 

 

 

 

 

 

 

 

10.0

 

 

 

 

 

0.75

 

 

 

 

5.0

 

 

VCC = 4.5V

 

 

 

 

 

 

 

 

 

 

TA = 25°C

 

 

0.5010

 

 

 

 

0 0

200

400

600

800

1000

 

28

40

66

CAPACITANCE (pF)

CYCLE FREQUENCY (MHz)

Document #: 38-06034 Rev. *D

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Cypress CY7C144, CY7C145 manual Typical DC and AC Characteristics

CY7C145, CY7C144 specifications

Cypress Semiconductor is renowned for its advanced memory solutions, and two of its noteworthy products are the CY7C144 and CY7C145, both of which serve as emerging leaders in the field of synchronous dynamic random-access memory (SDRAM). These memory chips provide high-speed data access, making them ideal for various applications, including networking, automotive, and industrial electronics.

The CY7C144 is a 4-Mbit SRAM, while its counterpart, the CY7C145, is an 8-Mbit SRAM. Both chips utilize a synchronous interface, which allows them to operate at clock rates that significantly enhance data retrieval speeds. Designed for low power consumption, these devices feature several power-saving modes, making them suitable for battery-operated applications.

One of the main features of the CY7C144 and CY7C145 is their support for burst read and write operations. This function enables the memory to deliver multiple bits of data sequentially with a single command, substantially increasing throughput. Additionally, both models come with a wide data bus, typically 16 bits, allowing for efficient data handling and alignment with a variety of systems.

The technology behind these chips includes static CMOS processes, which promote high performance and reliability under various operating environments. The CY7C144 and CY7C145 both guarantee a high level of data integrity, thanks to advanced error detection and correction features. This makes them especially valuable in applications where data accuracy is critical.

Another critical aspect is the integration of an on-chip address decoder for efficient memory addressing, minimizing delays during data access. This characteristic plays a crucial role in optimizing the overall system performance, particularly in high-bandwidth applications.

In terms of environmental resilience, these memories are designed to withstand a range of temperatures, making them robust enough for industrial applications. The CY7C144 and CY7C145 also comply with several industry standards, ensuring compatibility with a wide array of devices and systems.

In summary, the CY7C144 and CY7C145 by Cypress Semiconductor stand out due to their blend of high speed, low power consumption, and robust reliability. With advanced features like burst read/write capabilities, error detection, and temperature resilience, these memory chips are exceptional choices for modern electronic applications demanding speed and efficiency. Their continued evolution reflects Cypress's commitment to innovation in the semiconductor industry, catering to the growing needs of a data-driven world.