CDCE421 Datasheet, PDF (1/30 Pages) Texas Instruments – Fully Integrated Wide-Range, Low-Jitter, Crystal-Oscillator Clock Generator

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CDCE421
SCAS842 – APRIL 2007
Fully Integrated Wide-Range, Low-Jitter, Crystal-Oscillator Clock Generator
FEATURES
• Single 3.3V Supply
• High-Performance Clock Generator
Incorporating Crystal-Oscillator Circuitry With
Integrated Frequency Synthesizer
• Low-Output Jitter, as Low as 380 fs (rms
Integrated Between 10 kHz–20 MHz)
• Low Phase Noise at High Frequency; at 708
MHz It Is Less Than –109 dBc/Hz at 10-kHz
and –146 dBc/Hz at 10-MHz Offset From the
Carrier
• Supports Crystal Frequencies Between
27.35 MHz to 38.33 MHz
• Output Frequency Ranges From 10.9 MHz up
to 766.7 MHz and From 875.2 MHz up to
1175 MHz
• Low-Voltage Differential Signaling (LVDS)
Output, 100-Ω Differential Off-Chip
Termination, 10.9-MHz to 400-MHz Frequency
Range
A
A
A
CE
• Differential Low-Voltage Positive
Emitter-Coupled Logic (LVPECL) Output,
10.9-MHz to 1.175-GHz Frequency Range
• Two Fully Integrated Voltage-Controlled
Oscillators (VCOs) Support Wide Output
Frequency Range
• Fully Integrated Programmable Loop Filter
• Typical Power Consumption 240 mW in LVDS
Mode and 300 mW in LVPECL Mode
• Chip-Enable Control Pin
• Simple Serial Interface Allows Programming
After Manufacturing
• Integrated On-Chip Non-Volatile Memory
(EEPROM) to Store Settings Without the Need
to Apply High Voltage to the Device
• Die or QFN24 Package
• ESD Protection Exceeds 2 kV HBM
• Industrial Temperature Range –40°C to 85°C
APPLICATIONS
• Low-Cost, High-Frequency Crystal Oscillator
SDATA
X-tal
Output Enable/Programming Interface and EEPROM for Configuration Settings
Crystal
Oscillator
Input
Feedback
Divider
Loop Filter
VCO 1
VCO 2
CLK
NCLK
B0216-01
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated