Features

8- to 32-MHz input frequency range

CY25818: 8–16 MHz

CY25819: 16–32 MHz

Separate modulated and unmodulated clocks

Accepts clock, crystal, and resonator inputs

Down spread modulation

Power-down function

Low-power dissipation

CY25818 = 33 mW-typ @ 8 MHz

CY25818 = 56 mW-typ @ 16 MHz

CY25819 = 36 mW-typ @ 16 MHz

CY25819 = 63 mW-typ @ 32 MHz

Low cycle-to-cycle jitter

SSCLK = 250 ps-typ

REFOUT = 275 ps-typ

Available in 8-pin (150-mil) SOIC package

CY25818/19

Spread Spectrum Clock Generator

Applications

Printers and MFPs

LCD panels and notebook PCs

Digital copiers

PDAs

Automotive

CD-ROM, VCD, and DVD

Networking and LAN/WAN

Scanners

Modems

Embedded digital systems

Benefits

Peak electromagnetic interference (EMI) reduction by 8–16 dB

Fast time to market

Cost reduction

Block Diagram

300K

Pin Configuration

XIN/CLKIN 1

XOUT 8

VDD 7

VSS 2

REFERENCE

DIVIDER

MODULATION

CONTROL

INPUT

DECODER

3

6

S0 PD#

PD and

LF

XIN/CLKIN 1

CP

 

 

 

 

 

 

 

 

 

 

 

 

Vss 2 CY25818

 

 

VCO

 

 

 

VCO

 

 

CY25819

 

 

 

 

 

 

 

 

 

COUNTER

 

 

 

 

 

 

S0 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SSCLK 4

 

 

 

 

DIVIDER

 

 

4

SSCLK

 

 

 

 

 

and

 

 

5

REFCLK

 

 

 

 

 

 

 

 

 

 

 

 

MUX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 Pin SOIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8-pin SOIC

8XOUT

7Vdd

6PD#

5REFCLK

Cypress Semiconductor Corporation

198 Champion Court • San Jose, CA 95134-1709

408-943-2600

Document #: 38-07362 Rev. *B

 

Revised April 11, 2006

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Cypress CY25818, CY25819 manual Features, Applications, Benefits, Block Diagram, Pin Configuration

CY25819, CY25818 specifications

Cypress Semiconductor, a renowned player in the embedded solutions market, has introduced two advanced clock generators: the CY25819 and CY25818. These devices stand out in the realm of high-performance clock management solutions, offering a variety of features that make them ideal for various applications such as telecommunications, consumer electronics, and computing systems.

The CY25819 and CY25818 utilize cutting-edge technology to provide users with exceptional flexibility and reliability. Both devices are designed to generate multiple clock outputs from a single reference clock input, which ultimately reduces component count and simplifies circuit design. This is especially valuable in modern electronic designs that prioritize space efficiency and power reduction.

One of the key features of the CY25819 is its ability to produce up to nine output clocks, while the CY25818 generates up to six. This capability allows designers to meet the diverse timing requirements of complex systems seamlessly. Additionally, both models support a wide range of output frequencies, which can be easily configured through I2C communication. This programmability ensures that designers can adapt the device to their specific needs, enhancing its versatility for different applications.

In terms of performance characteristics, both the CY25819 and CY25818 exhibit low phase noise and jitter, critical metrics for applications where timing precision is paramount. The low jitter performance is particularly important in high-speed data transfers and communication interfaces, as it helps maintain signal integrity and minimize errors.

Another notable feature includes power management capabilities. The CY25819 and CY25818 provide multiple power-saving modes, such as a low power sleep mode, which significantly reduces power consumption when the system is idle. This energy-efficient design is aligned with the growing demand for sustainable electronic solutions and extends battery life in portable applications.

Furthermore, these devices are built with robust engineering to ensure high reliability under various operating conditions. They offer a wide temperature range, making them suitable for industrial applications.

In summary, the Cypress CY25819 and CY25818 clock generators are exceptional solutions tailored for complex timing needs in a diverse array of industries. With their high output capabilities, superior performance, energy-efficient features, and reliability, they represent the forefront of clock management technology, enabling engineers to innovate and optimize their designs effectively.