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NB3N3010B Datasheet

12.288 MHz Audio Oversampling Clock Generator

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NB3N3010B
3.3V, 12.288 MHz Audio
Oversampling Clock
Generator for USB
Applications
Description
The NB3N3010B is a precision, low noise clock multiplier that
generates an output frequency of 12.288 MHz. This is accomplished
by using FrequencyLockedLoop (FLL) techniques where a 4 kHz
reference input is multiplied by 3072, or an 8 kHz input by 1536. The
frequency multiplier is selected by the S0 pin.
The two LVCMOS output drivers are disabled to a logic Low with
the ENABLEn pin set HIGH. The NB3N3010B operates from a single
+3.3 V supply, and is available in the SOIC8 pin package, and
optionally in a DFN8 package. The operating temperature range is
from 0°C to +85°C.
The NB3N3010B device provides the optimum combination of low
cost, flexibility, and high performance. This makes it ideal for
applications such as oversampling AtoD and DtoA converters
from a low reference frequency, such as a USB startofframe (SOF)
pulse.
http://onsemi.com
8
1
SOIC8
D SUFFIX
CASE 751
MARKING
DIAGRAMS*
8
3010B
ALYW
G
1
DFN8
MN SUFFIX
CASE 506AA
14
Features
Accepts 8 kHz or 4 kHz Reference Input Derived from USB
StartofFrame
Generates 12.288 MHz FrequencyLocked to the Reference
Fully Integrated FrequencyLockLoop with Internal Loop Filter
Low Skew Dual LVCMOS Outputs
Very Low Phase Noise Preserves Codec Noise Floor
Internal Voltage Regulator
Supply Voltage Required: +3.3 V $5%
Temperature Range: 0°C to +85°C
These are PbFree Devices
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
M = Date Code
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 7 of this data sheet.
REF
3
VDD
8
+1.8 V
Linear
Regulator
Tolerant
Frequency
Detector
CFILT
5
GND
4
Loop Filter
Frequency
Generator
Output
Buffers
CLK_A
6
CLK_B
7
Divider
1
ENABLEn
2
S0
Figure 1. NB3N3010B Simplified Diagram
© Semiconductor Components Industries, LLC, 2011
May, 2011 Rev. 0
1
Publication Order Number:
NB3N3010B/D


  ON Semiconductor Electronic Components Datasheet  

NB3N3010B Datasheet

12.288 MHz Audio Oversampling Clock Generator

No Preview Available !

NB3N3010B
ENABLEn 1
8 VDD
S0 2
REF 3
NB3N3010B
7 CLKB
6 CLKA
GND 4
5 CFILT
Figure 2. Pinout SOIC8 / DFN8 (Top View)
Table 1. PIN DESCRIPTION
Pin Symbol
I/O
1 ENABLEn LVTTL/
LVCMOS Input
2 S0 LVTTL/
LVCMOS Input
3 REF
Input
4
GND
Power Supply
5 CFILT
Analog
6
CLKA
LVCMOS
Output
7
CLKB
LVCMOS
Output
8
VDD
Power Supply
Description
Low active Output Enable; Defaults HIGH when left open; Internal pullup resistor to
VDD.
Frequency Select Input. See input frequency select Table 2 for details. Defaults HIGH
when left open. Internal pullup resistor to VDD.
Reference Clock input
Negative Supply Voltage; Ground 0 V. This pin provides GND return path to the VDD
supply.
Connection for external filter capacitor for internal +1.8 V regulator; see Figure 4.
Clock output, copy A (12.288 MHz)
Clock output, copy B (12.288 MHz)
Positive Supply Voltage, +3.3 V $5%
http://onsemi.com
2


Part Number NB3N3010B
Description 12.288 MHz Audio Oversampling Clock Generator
Maker ON Semiconductor
Total Page 9 Pages
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