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PCS3P25814

ON Semiconductor
Part Number PCS3P25814
Manufacturer ON Semiconductor
Description Spread Spectrum Clock Generator
Published Feb 16, 2011
Detailed Description PCS3P25811 and PCS3P25812 and PCS3P25814 Spread Spectrum Clock Generator www.DataSheet4U.com Features • Generates a 1x...
Datasheet PDF File PCS3P25814 PDF File

PCS3P25814
PCS3P25814

Overview
PCS3P25811 and PCS3P25812 and PCS3P25814 Spread Spectrum Clock Generator www.
DataSheet4U.
com Features • Generates a 1x (PCS3P25811), 2x (PCS3P25812) and 4x(PCS3P25814) low EMI spread spectrum clock of the input frequency • Provides up to 15dB of EMI suppression • Input Frequency: 4MHz - 32MHz • Output Frequency: PCS3P25811: 4MHz - 32MHz PCS3P25812: 8MHz - 64MHz PCS3P25814: 16MHz - 128MHz • Selectable spread options: Down Spread and Center Spread • Low Power Dissipation: 3.
3V: 20mW (typ) @ 6MHz 3.
3V: 24mW (typ) @ 12MHz 3.
3V: 30mW (typ) @ 24MHz • Low inherent Cycle-to-Cycle Jitter • Supply Voltage: 2.
8V to 3.
6V • LVCMOS Input and output • Functional and Pinout compatible to Cypress CY25811, CY25812 and CY25814 dependent signals.
It allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding, and other passive components that are traditionally required to pass EMI regulations.
The PCS3P25811/12/14 can generate an EMI reduced clock from crystal, ceramic resonator, or system clock.
The PCS3P25811/12/14 modulate the output of a single PLL in order to “spread” the bandwidth of a synthesized cock, and more importantly, decreases the peak amplitudes of its harmonics.
This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators.
Lowering EMI by increasing a signal’s bandwidth is called ‘spread spectrum clock generation.
’ The PCS3P25811/12/14 use the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method.
The PCS3P25811/12/14 have 2 pins S0 and S1 to control the selection of Center Spread, Down Spread and NoSpread functions.
Additionally there is a 3 level logic contol FSEL, for selecting one of the three different frequency ranges within the operating frequency range.
Refer Input/Output Frequency Range Selection Table.
The PCS3P25811/12/14 operate from a 2.
8V to 3.
6V supply...


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