NB2579A-D| Datasheet

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NB2579A Low Power, Reduced EMI Clock Synthesizer
The NB2579A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The NB2579A reduces ElectroMagnetic Interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The NB2579A allows significant system cost savings by reducing the number of circuit board layers, ferrite beads and shielding that are traditionally required to pass EMI regulations. The NB2579A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The NB2579A 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'. T
he NB2579A is targeted towards all portable devices with very low power requirements like MP3 players and digital still cameras.
Features http://onsemi.com MARKING DIAGRAM*
6 1 TSOP-6 (TSOT-23-6) SN SUFFIX CASE 318G E01 A Y W G

E01AYWG G 1

= Specific Device Code = Assembly Location = Year = Work Week = Pb-Free Package

(Note: Microdot may be in either location) *For additional marking information, refer to Application Note AND8002/D.

Generates an EMI Optimized Clocking Signal at the Output Integrated Loop Filter Components Operates with a 3.3 V / 2.5 V Supply Operating Current less than 4.0 mA Low Power CMOS Design Input Frequency Range: 13 MHz to 30 MHz Generates a 1X Low EMI Spread Spectrum clock of the Input Frequency Spread Spectrum Enable Control Frequency Deviation "1% @ 24 MHz Available in TSOP-6 Package (TSOT-23-6) Pb-Free Package is Available

ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet.

Semiconductor Components Industries, LLC, 2006

December, 2006 - Rev. 3

Publication Order Number: NB2579A/D