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P1817B Dataheets PDF



Part Number P1817B
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Low-Power Mobile VGA EMI Reduction IC
Datasheet P1817B DatasheetP1817B Datasheet (PDF)

P1817A, P1817B Product Preview Low-Power Mobile VGA EMI Reduction IC Description The P1817 is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies. The P1817 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P1817 allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding and other passive comp.

  P1817B   P1817B



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P1817A, P1817B Product Preview Low-Power Mobile VGA EMI Reduction IC Description The P1817 is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies. The P1817 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P1817 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 P1817 modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, 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 P1817 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. http://onsemi.com SOIC−8 S SUFFIX CASE 751BD TSSOP−8 T SUFFIX CASE 948AL PIN CONFIGURATION 1 CLKIN / XIN XOUT VSS VDD SR0 REF SSON / SBM ModOUT Applications The P1817 is targeted towards notebook LCD displays, and other displays using an LVDS interface, PC peripheral devices, and embedded systems. Features • FCC Approved Method of EMI Attenuation • Generates a Low EMI Spread Spectrum Clock of the Input Frequency (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. • Optimized for Frequency Range from: • P1817A – 20 to 32 MHz • P1817B – 10 to 20 MHz • Internal Loop Filter Minimizes External Components and Board Space • Two Selectable Spread Ranges • Low Inherent Cycle−to−Cycle Jitter • 3.3 V or 5 V Operating Voltage Range • TTL or CMOS Compatible Inputs and Outputs • Ultra−low Power CMOS Design • 3.17 mA @ 3.3 V, 10 MHz | 6.20 mA @ 5.0 V, 10 MHz • 4.28 mA @ 3.3 V, 14 MHz | 7.50 mA @ 5.0 V, 14 MHz • 5.50 mA @ 3.3 V, 20 MHz | 9.50 mA @ 5.0 V, 20 MHz • Supports Notebook VGA and Other LCD Timing Controller Applications • SSON / SBM Pin for Spread Spectrum On/Off and Standby Mode Controls • Available in 8−pin SOIC and TSSOP • These are Pb−Free Devices This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. P3 1 Publication Order Number: P1817A/D CLKIN / XIN XOUT REF P1817A, P1817B SR0 SSON VDD Frequency Divider Feedback Divider Modulation Phase Detector Loop Filter PLL VCO Output Divider ModOUT VSS Figure 1. Block Diagram Table 1. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit VDD, VIN Voltage on any pin with respect to GND −0.5 to +7.0 V TSTG Stor.


P1817A P1817B P1P8160A


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