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CDC421100RGET Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce CDC421100RGET
Description  FULLY INTEGRATED FIXED FREQUENCY LOW-JITTER, CRYSTAL-OSCILLATOR CLOCK
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

CDC421100RGET Fiches technique(HTML) 1 Page - Texas Instruments

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FEATURES
APPLICATIONS
Crystal
Oscillator
Input
ExternalCrystal
Feedback
Divider
LoopFilter
VCO
CLK
NCLK
B0216-02
DESCRIPTION
CDC421xxx
SLAS540 – APRIL 2007
FULLY INTEGRATED FIXED FREQUENCY LOW-JITTER, CRYSTAL-OSCILLATOR CLOCK
GENERATOR
• Output Frequencies: 100 MHz, 106.25 MHz,
125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz,
• Single 3.3 V Supply
and 312.5 MHz
• High-Performance Clock Generator,
• Differential Low-Voltage Positive Emitter
Incorporating Crystal Oscillator Circuitry With
Coupled Logic (LVPECL) Output
Integrated Frequency Synthesizer
• Fully Integrated Voltage-Controlled Oscillator
• Low Output Jitter, as Low as 380 fs (rms
(VCO) Running from 1.75 GHz to 2.35 GHz
integrated between 10 kHz–20 MHz)
• Typical Power Consumption 300 mW
• Low Phase Noise at 312.5 MHz, Less Than
–120 dBc/Hz at 10 kHz and –147 dBc/Hz at 10
• Chip-Enable Control Pin
MHz Offset From the Carrier
• QFN-24 Package
• Supports Crystal Frequencies or LVCMOS
• ESD Protection Exceeds 2 kV HBM
Input Frequencies at 31.25 MHz, 33.33 MHz,
• Industrial Temperature Range –40°C to 85°C
and 35.42 MHz
A
A
• Low-Cost, Low-Jitter Frequency Multiplier
A
A
CDC421xxx is a high-performance, low-phase-noise clock generator. It has an integrated low-noise, LC-based
voltage-controlled oscillator (VCO) that operates within the 1.75 GHz–2.35 GHz frequency range. It has an
integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable
frequency reference for the PLL-based frequency synthesizer. The output frequency (fout) is proportional to the
frequency of the input crystal (fxtal).
The device operates in a 3.3 V supply environment and is characterized for operation from –40
°C to 85°C.
CDC421xxx is available in a QFN-24 package.
A high-level block diagram of the CDC421xxx is shown in Figure 1.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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