CY25402SXC datasheet(1/14 Pages) CYPRESS

Part #	CY25402SXC

Description	Two PLL Programmable Clock Generator with Spread Spectrum

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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CY25402/CY25422/CY25482

Two PLL Programmable Clock Generator

with Spread Spectrum

Cypress Semiconductor Corporation

•

198 Champion Court

•

San Jose

, CA 95134-1709

•

408-943-2600

Document #: 001-12565 Rev. *F

Revised April 20, 2011

Features

■ Two fully integrated phase locked loops (PLLs)

■ Input frequency range

❐ External crystal: 8 to 48 MHz

❐ External reference: 8 to 166 MHz clock

■ Reference clock input voltage range

❐ 2.5 V, 3.0 V, and 3.3 V for CY25482

❐ 1.8 V for CY25402 and CY25422

■ Wide operating output frequency range

❐ 3 to 166 MHz

■ Programmable spread spectrum with center and down spread

option and lexmark and linear modulation profiles

■ VDD supply voltage options:

❐ 2.5 V, 3.0 V, and 3.3 V for CY25402 and CY25482

❐ 1.8 V for CY25422

■ Selectable output clock voltages independent of VDD:

❐ 2.5 V, 3.0 V, and 3.3 V for CY25402 and CY25482

❐ 1.8 V for CY25422

■ Frequency select feature with option to select four different

frequencies

■ Power-down, Output Enable, and SS ON/OFF controls

■ Low jitter, high accuracy outputs

■ Ability to synthesize nonstandard frequencies with Fractional-N

capability

■ Three clock outputs with programmable drive strength

■ Glitch-free outputs while frequency switching

■ 8-pin small outline integrated circuit (SOIC) package

■ Commercial and Industrial temperature ranges

Benefits

■ Multiple high performance PLLs allow synthesis of unrelated

frequencies

■ Nonvolatile programming for personalization of PLL

frequencies, spread spectrum characteristics, drive strength,

crystal load capacitance, and output frequencies

■ Application specific programmable EMI reduction using spread

spectrum for clocks

■ Programmable PLLs for system frequency margin tests

■ Meets critical timing requirements in complex system designs

■ Suitability for PC, consumer, portable, and networking

applications

■ Capable of zero parts per million (PPM) frequency synthesis

error

■ Uninterrupted system operation during clock frequency switch

■ Application compatibility in standard and low power systems

Block Diagram

OSC

CLK2

REFOUT

CLK1

Crossbar

Switch

FS1

SSON

XOUT

XIN/

EXCLKIN

PD#/OE

PLL 2

(SS)

FS0

MUX

and

Control

Logic

PLL 1

(SS)

Output

Dividers

and

Drive

Strength

Control

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