nb2769a ON Semiconductor, nb2769a Datasheet

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nb2769a

Manufacturer Part Number
nb2769a
Description
Low Power, Reduced Emi Clock Synthesizer
Manufacturer
ON Semiconductor
Datasheet

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NB2769A
Low Power, Reduced EMI
Clock Synthesizer
designed specifically for a wide range of clock frequencies. The
NB2769A reduces ElectroMagnetic Interference (EMI) at the clock
source, allowing system wide reduction of EMI of all clock dependent
signals. The NB2769A 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.
profile approved by the FCC and is implemented by using a
proprietary all digital method.
“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’.
low power requirements like MP3 players and digital still cameras.
Features
© Semiconductor Components Industries, LLC, 2006
December, 2006 − Rev. 3
The NB2769A is a versatile spread spectrum frequency modulator
The NB2769A uses the most efficient and optimized modulation
The NB2769A modulates the output of a single PLL in order to
The NB2769A is targeted towards all portable devices with very
Input Frequency Range: 6.0 MHz to 13 MHz for 3.3 V
Frequency
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
Generates a 1X Low EMI Spread Spectrum clock of the Input
Frequency Deviation "1% @ 10 MHz
Available in TSOP−6 Package (TSOT−23−6)
Pb−Free Package is Available
1
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
6
*For additional marking information, refer to
(Note: Microdot may be in either location)
Application Note AND8002/D.
1
ORDERING INFORMATION
E05 = Specific Device Code
A
Y
W
G
http://onsemi.com
(TSOT−23−6)
= Assembly Location
= Year
= Work Week
= Pb−Free Package
CASE 318G
SN SUFFIX
TSOP−6
Publication Order Number:
1
DIAGRAM*
MARKING
E05AYWG
NB2769A/D
G

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nb2769a Summary of contents

Page 1

... The NB2769A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The NB2769A 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 ...

Page 2

... Figure 1. Block Diagram For 2.5 V Supply 6 MHz < CLKIN < 12 MHz For 3.3 V Supply 6 MHz < CLKIN < 13 MHz 200 ps (maximum) 45/55% (worst case) F /256 IN " MHz 1 PD XOUT 2 NB2769A 3 Figure 2. Pin Configuration Description http://onsemi.com PLL Output V CO Divider V SS Specification ...

Page 3

Table 3. MAXIMUM RATINGS Symbol V V Voltage on any pin with respect to Ground DD Storage Temperature STG T Operating Temperature A T Max. Soldering Temperature (10 sec Junction Temperature J T Static Discharge Voltage ...

Page 4

Table 4. DC ELECTRICAL CHARACTERISTICS FOR 2.5 V SUPPLY temperature 25°C) Symbol V Input LOW Voltage IL V Input HIGH Voltage IH I Input LOW Current IL I Input HIGH Current IH I XOUT Output LOW Current (@ 0.5 V, ...

Page 5

Table 6. DC ELECTRICAL CHARACTERISTICS FOR 3.3 V SUPPLY temperature 25°C) Symbol V Input LOW Voltage IL V Input HIGH Voltage IH I Input LOW Current IL I Input HIGH Current IH I XOUT Output LOW Current (@ 0.4 V, ...

Page 6

Table 8. TYPICAL CRYSTAL SPECIFICATIONS Nominal Frequency Frequency Tolerance Operating Temperature Range Storage Temperature Load Capacitance Shunt Capacitance ESR XIN XOUT R1 = 510 W Crystal Figure 4. Typical Crystal Oscillator Circuit ...

Page 7

... ORDERING INFORMATION Device Marking NB2769ASNR2 E05 NB2769ASNR2G E05 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Temperature Range Package 0°C − 70°C TSOP−6 (TSOT−23−6) 0° ...

Page 8

... H 2.50 2.75 3.00 0.099 0.108 E q 0° − 10° 0° − 0.7 0.028 mm SCALE 10:1 inches ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NB2769A/D MAX 0.043 0.004 0.020 0.010 0.122 0.067 0.041 0.024 0.118 10° ...

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