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P3P25814AG-08CR Datasheet(PDF) 1 Page - ON Semiconductor |
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P3P25814AG-08CR Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 9 page PCS3P25811 and PCS3P25812 and PCS3P25814 Spread Spectrum Clock Generator ©2010 SCILLC. All rights reserved. Publication Order Number: JANUARY 2010 – Rev. 1 PCS3P25811/D 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 • 8-pin SOIC, and 8L 2mmX2mm WDFN (TDFN) Packages Product Description The PCS3P25811/12/14 devices are versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 4MHz to 32MHz. The PCS3P25811/12/14 reduce electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data 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 No- Spread 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 and are available in 8 pin SOIC, and 8L 2mmX2mm WDFN packages. Applications The PCS3P25811/12/14 are targeted towards EMI management in applications such as LCD Panels, MFPs, Digital copiers, Networking, PC peripheral devices, consumer electronics, and embedded controller systems. |
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