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NB4N441 Datasheet

3.3V Serial Input MultiProtocol PLL Clock Synthesizer

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NB4N441
3.3V Serial Input
MultiProtocol PLL Clock
Synthesizer, Differential
LVPECL Output
Description
The NB4N441 is a precision clock synthesizer which generates a
differential LVPECL clock output frequency from 12.5 MHz to
425 MHz. A Serial Peripheral Interface (SPI) is used to configure the
device to produce one of sixteen popular standard protocol output
frequencies from a single 27 MHz crystal reference. The NB4N441
also has the added feature of allowing application specific output
frequencies from 12.5 MHz to 425 MHz using crystals within the
range of 10 MHz to 28 MHz.
Features
Performs Precision Clock Generation and Synthesis from a Single
27 MHz Crystal Reference
Serial Load Capability for Proprietary Frequencies
Flexible Input Allows for External Clock Reference
Exceeds Bellcore and ITU Jitter Generation Specification
PLL Lock Detect Output
Output Enable
Fully Integrated PhaseLockLoop with Internal Loop Filter
Operating Range: VCC = 3.135 V to 3.465 V
Small Footprint 24 Pin QFN
These are PbFree Devices*
LOCKED
27 MHz
XTAL
OSC
B
R
FB
Feedback
Divider
SDATA
SCLOCK
SLOAD
Frequency Control Logic
Serial Load
http://onsemi.com
QFN24
MN SUFFIX
CASE 485L
MARKING
DIAGRAM*
24
1 NB4N
441
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
OUTDIV
B2, 4, 8,
16, 32
CLKOUT
CLKOUT
OE
VCC 2 V
Figure 1. Simplified Block Diagram
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2011
April, 2011 Rev. 2
1
Publication Order Number:
NB4N441/D


  ON Semiconductor Electronic Components Datasheet  

NB4N441 Datasheet

3.3V Serial Input MultiProtocol PLL Clock Synthesizer

No Preview Available !

CLK/XTAL1
XTAL2
NB4N441
VCC
XTAL
OSC
LOCKED
Input
Prescaler
PB
PFD
R
FB
VCC_PLL
Loop
Filter
VCO
Feedback
Divider (MB)
OUTDIV (NB)
B2, 4, 8,
16, 32
SDATA
SCLOCK
SLOAD
GND
P[4:0] M[9:0] N[3:0]
Frequency Control Logic
Serial Load
Figure 2. Block Diagram
OE
CLKOUT
CLKOUT
GND 1
NC 2
VCC_PLL 3
NC 4
NC 5
GND 6
24 23 22 21 20 19
Exposed Pad
(EP)
18 GND
17 SCLOCK
16 SDATA
15 SLOAD
14 NC
13 VCC
7 8 9 10 11 12
Figure 3. QFN24 Lead Pinout (Top View)
http://onsemi.com
2


Part Number NB4N441
Description 3.3V Serial Input MultiProtocol PLL Clock Synthesizer
Maker ON Semiconductor
Total Page 12 Pages
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