CY25404 Datasheet, PDF (1/13 Pages) Cypress Semiconductor – Quad PLL Programmable Clock Generator with Spread Spectrum

CY25404
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
❐ External reference: 8 to 166 MHz clock
■ Wide operating output frequency range
❐ 3 to 166 MHz
■ Programmable spread spectrum with center and down
spread option and lexmark and linear modulation profiles
■ Selectable V_DD supply voltage options:
❐ 2.5 V, 3.0 V, and 3.3 V
■ Selectable output clock voltages, independent of V_DD supply:
❐ 2.5 V, 3.0 V, and 3.3 V
■ Frequency select feature with option to select eight different
frequencies over nine clock outputs
■ 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
■ 20-pin TSSOP 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 electromagnetic
interference (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
XIN/
EXCLKIN
XOUT
OSC
FS 0
FS 1
FS 2
MUX
and
Control
Logic
SSON
PLL1
PLL2
PLL3
(SS)
PLL4
(SS)
Crossbar
Switch
Bank
1
Output
Dividers
and Bank
2
Drive
Strength
Control _Bank
3
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
CLK9
OE
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-43258 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 11, 2011