CY7B991

CY7B992

 

 

Figure 8. Board-to-Board Clock Distribution

 

 

 

 

 

 

REF

 

 

LOAD

 

 

 

 

 

 

 

 

 

 

 

Z0

 

 

 

 

L1

 

 

 

 

FB

 

 

 

 

LOAD

SYSTEM

REF

 

 

 

 

 

 

 

 

 

CLOCK

FS

 

L2

 

Z0

 

 

4Q0

 

 

 

4F0

 

 

 

 

 

4F1

4Q1

 

 

 

 

 

 

 

 

 

 

 

3F0

3Q0

 

 

 

 

 

3F1

3Q1

L3

 

 

LOAD

 

2F0

2Q0

 

 

Z0

 

 

2F1

2Q1

 

 

 

 

 

 

 

 

 

1F0

1Q0

L4

 

 

 

 

1F1

1Q1

 

FB

 

 

 

TEST

 

 

 

 

 

 

 

REF

 

 

 

 

 

 

 

 

 

 

 

 

FS

4Q0

LOAD

 

 

 

Z0

4F0

 

 

 

 

4Q1

 

 

 

 

4F1

 

 

 

 

 

3F0

3Q0

 

 

 

 

 

3F1

3Q1

 

 

 

 

 

2F0

2Q0

LOAD

 

 

 

 

2F1

2Q1

 

 

 

 

1F0

1Q0

 

 

 

 

 

1F1

1Q1

 

 

 

 

 

TEST

 

Figure 8 shows the CY7B991 and 992 connected in series to construct a zero skew clock distribution tree between boards. Delays of the downstream clock buffers are programmed to compensate for the wire length (that is, select negative skew equal to the wire delay) necessary to connect them to the master clock source, approximating a zero delay clock tree. Cascaded clock buffers accumu- lates low frequency jitter because of the non-ideal filtering characteristics of the PLL filter. Do not connect more than two clock buffers in series.

Document Number: 38-07138 Rev. *B

Page 15 of 19

[+] Feedback

Page 15
Image 15
Cypress CY7B991, CY7B992 manual Board-to-Board Clock Distribution

CY7B991, CY7B992 specifications

The Cypress CY7B992 and CY7B991 are advanced synchronous SRAM devices designed for high-speed applications, particularly in the field of telecommunications, networking, and high-performance computing. These SRAMs are notable for their ability to operate at high frequencies, making them suitable for systems that require rapid data access and processing.

One of the main features of the CY7B992 and CY7B991 is their support for synchronous operation, which allows for data transfers aligned with a clock signal. This capability significantly enhances performance by reducing access times and increasing data throughput compared to traditional asynchronous SRAMs. With their optimized write and read cycles, these devices can achieve low latency, enabling efficient data handling in real-time applications.

Another key technology utilized in these devices is the use of a 2-port architecture, which supports simultaneous read and write operations. This dual-port design allows for greater flexibility and efficiency in data management, making it easier to implement complex memory architectures in various applications. The architecture also supports burst mode operation, allowing for rapid sequential data access, which is crucial in environments where speed is paramount.

The CY7B992 and CY7B991 feature a wide data bus width, accommodating 32 bits to suit modern data processing needs. Their compact size and ease of integration into existing systems make them popular choices among designers and engineers. Moreover, these SRAMs offer a comprehensive range of voltage and temperature specifications, ensuring reliable performance across diverse operating conditions.

In terms of power management, the CY7B992 and CY7B991 are designed to consume low power while maintaining high performance, making them ideal for battery-operated or energy-sensitive applications. The devices include various power-saving features, such as power-down modes, enabling users to reduce overall system power consumption when the memory is not actively in use.

Overall, the Cypress CY7B992 and CY7B991 are robust, high-speed SRAM solutions that cater to the demands of sophisticated, data-intensive applications. Their synchronous operation, dual-port architecture, and efficient power management characteristics make them essential components in modern electronic systems. As technology continues to evolve, these SRAMs are poised to play a critical role in advancing the capabilities of next-generation devices.