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VT83201 Datasheet(PDF) 1 Page - Vaishali Semiconductor

Part No. VT83201
Description  3.3V Low Phase Noise VCXO Voltage-Controlled Crystal Oscillator and PLL Clock Synthesizer
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Maker  VAISH [Vaishali Semiconductor]
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VT83201 Datasheet(HTML) 1 Page - Vaishali Semiconductor

   
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2001-04-12
Page
1
MDST-0011-01
www.vaishali.com
Vaishali Semiconductor
747 Camden Avenue, Suite C
Campbell
CA 95008
Ph. 408.377.6060
Fax 408.377.6063
Applications
•= DSL clock source
•= Set-top boxes
•= Telecom switching
•= MPEG Video clock source
•= HDTV
General Description
The Vaishali VT83201 is a single-chip, integrated VCXO and Phase Locked Loop (PLL) clock synthesizer.
The device uses the VCXO and an analog Phase-Locked Loop (PLL) to accept a 10 MHz to 20 MHz, 30pF
(pull range of 200 ppm) crystal input, in order to produce either one or two output clocks. A 0 to 3V control
signal is used to fine tune the output clock frequency in the ±100ppm range. Select inputs S0 and S1 are
used for frequency and output selection.
Features
•= 3.3V supply operation
•= Packaged in 16-pin SOIC package
•= Replaces separate VCXO and multiplier
•= Uses inexpensive pullable crystal
•= On-chip VCXO with 200 ppm pull range (±100 ppm)
•= 5V-tolerant control inputs
•= Zero ppm synthesis error in both
clocks
VT83201
3.3V Low Phase Noise VCXO
(Voltage-Controlled Crystal Oscillator)
and PLL Clock Synthesizer
Figure 1. Functional Block Diagram
CLK1
CLK2
VDD1
VDD2
X2
Load Cap Control
Low
Phase
Noise
PLL
Output
Buffer
Output
Buffer
osc
Load
Caps
OE
10-20 MHz
Pullable
Crystal
S1:S0
VIN
X1


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