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Cypress Semiconductor Electronic Components Datasheet

CY2548 Datasheet

Quad PLL Programmable Clock Generator

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CY2544/CY2546/CY2548
Quad-PLL Programmable Clock Generator
with Spread Spectrum
Quad-PLL Programmable Clock Generator with Spread Spectrum
Features
Four fully-integrated phase-locked loops (PLLs)
Input frequency range
External crystal: 8 to 48 MHz for CY2544 and CY2546
External reference: 8 to 166 MHz clock
Reference clock input voltage range
2.5 V, 3.0 V, and 3.3 V for CY2548
1.8 V for CY2544 and CY2546
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 CY2544 and CY2548
1.8 V for CY2546
Selectable output clock voltages:
1.8 V, 2.5 V, 3.0 V, and 3.3 V for CY2544 and CY2548
1.8 V for CY2546
Frequency select feature with option to select eight different
frequencies over nine clock outputs
Power down, output enable, and SS ON/OFF controls
Low jitter, high accuracy outputs
Ability to synthesize nonstandard frequencies with Fractional-N
capability
Up to nine clock outputs with programmable drive strength
Glitch free outputs while frequency switching
24-pin QFN package
Commercial and Industrial temperature ranges
One-time programmability
For programming support, contact Cypress technical support
or send an e-mail to clocks@cypress.com
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 PPM frequency synthesis error
Uninterrupted system operation during clock frequency switch
Application compatibility in standard and low-power systems
Functional Description
For a complete list of related documentation, click here.
Logic Block Diagram
CLKIN
XIN/
EXCLKIN
XOUT
OSC
FS 0
FS 1
FS 2
MUX
and
Control
Logic
PLL1
PLL2
PLL3
(SS)
Crossbar
Switch
Output
Bank
1
Dividers
and Bank
2
Drive
Strength
Control Bank
3
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
CLK9
SSON
PLL4
(SS)
PD#/OE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-12563 Rev. *M
• San Jose, CA 95134-1709 • 408-943-2600
Revised October 31, 2017


Cypress Semiconductor Electronic Components Datasheet

CY2548 Datasheet

Quad PLL Programmable Clock Generator

No Preview Available !

CY2544/CY2546/CY2548
Contents
Device Selection Guide .................................................... 3
Pinout ................................................................................ 3
Pin Definitions .................................................................. 3
Pinout ................................................................................ 4
Pin Definitions .................................................................. 5
Functional Overview ........................................................ 5
Four Configurable PLLs .............................................. 5
Input Reference Clocks ............................................... 5
Multiple Power Supplies .............................................. 6
Output Bank Settings .................................................. 6
Output Source Selection ............................................. 6
Spread Spectrum Control ............................................ 6
Frequency Select ........................................................ 6
Glitch-Free Frequency Switch ..................................... 6
PD#/OE Mode ............................................................. 6
Output Drive Strength .................................................. 6
Generic Configuration and Custom Frequency ........... 6
Output Driver Supply
and Multi-Function Input Restriction ................................... 6
Absolute Maximum Conditions ....................................... 7
Recommended Operating Conditions ............................ 7
DC Electrical Specifications ............................................ 7
AC Electrical Specifications ............................................ 9
Configuration Example for C-C Jitter ............................. 9
Recommended Crystal Specification ............................. 9
Recommended Crystal Specification ........................... 10
Test and Measurement Setup ........................................ 10
Voltage and Timing Definitions ..................................... 10
Ordering Information ...................................................... 11
Possible Configurations ............................................. 11
Ordering Code Definitions ......................................... 12
Package Drawing and Dimensions ............................... 13
Acronyms ........................................................................ 14
Document Conventions ................................................. 14
Units of Measure ....................................................... 14
Document History Page ................................................. 15
Sales, Solutions, and Legal Information ...................... 17
Worldwide Sales and Design Support ....................... 17
Products .................................................................... 17
PSoC® Solutions ...................................................... 17
Cypress Developer Community ................................. 17
Technical Support ..................................................... 17
Document Number: 001-12563 Rev. *M
Page 2 of 17


Part Number CY2548
Description Quad PLL Programmable Clock Generator
Maker Cypress Semiconductor
Total Page 17 Pages
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