NB2969A datasheet(1/8 Pages) ONSEMI

部件名	NB2969A

功能描述	Low Power, Reduced EMI Clock Synthesizer

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制造商	ONSEMI [ON Semiconductor]

网页	http://www.onsemi.com

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December, 2006 − Rev. 3

1

Publication Order Number:

NB2969A/D

NB2969A

Low Power, Reduced EMI

Clock Synthesizer

The NB2969A is a versatile spread spectrum frequency modulator

designed specifically for a wide range of clock frequencies. The

NB2969A reduces ElectroMagnetic Interference (EMI) at the clock

source, allowing system wide reduction of EMI of all clock dependent

signals. The NB2969A 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 NB2969A uses the most efficient and optimized modulation

profile approved by the FCC and is implemented by using a

proprietary all digital method.

The NB2969A 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 NB2969A is targeted towards all portable devices with very

low power requirements like MP3 players, Notebooks and digital still

cameras.

Features

• 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: 6.0 MHz to 12 MHz for 2.5 V

Input Frequency Range: 6.0 MHz to 13 MHz for 3.3 V

• Generates a 1X Low EMI Spread Spectrum clock of the Input

Frequency

• Frequency Deviation "1% @ 10 MHz

• Available in TSOP−6 Package (TSOT−23−6)

• Pb−Free Package is Available

MARKING

DIAGRAM*

*For additional marking information, refer to

Application Note AND8002/D.

TSOP−6

(TSOT−23−6)

SN SUFFIX

CASE 318G

See detailed ordering and shipping information in the package

dimensions section on page 7 of this data sheet.

ORDERING INFORMATION

http://onsemi.com

1

6

EOC = Specific Device Code

A

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

EOCAYWG

G

1

(Note: Microdot may be in either location)

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