CDCE62005 Datasheet, PDF (5/76 Pages) Texas Instruments – Five/Ten Output Clock Generator/Jitter Cleaner With Integrated Dual VCOs

CDCE62005
www.ti.com........................................................................................................................................................................................... SCAS862 – NOVEMBER 2008
FUNCTIONAL DESCRIPTION
PRI_IN
SEC_IN
XTAL /
AUX_IN
EXT_LFP
EXT_LFN
/1:/2:HiZ
/1:/2:HiZ
Reference
Divider
Input
Divider
Feedback
Divder
PFD /
CP
Prescaler
REF_SELECT
/Power_down
/SYNC
SPI_LE
SPI_CLK
SPI_MISO
SPI_MOSI
Interface
&
Control
EEPROM
Output
Divider 0
Output
Divider 1
Output
Divider 2
Output
Divider 3
Output
Divider 4
U0P
U0N
U1P
U1N
U2P
U2N
U3P
U3N
U4P
U4N
AUX
OUT
Figure 3. CDCE62005 Block Diagram
The CDCE62005 comprises of four primary blocks: the interface and control block, the input block, the output
block, and the synthesizer block. In order to determine which settings are appropriate for any specific
combination of input/output frequencies, a basic understanding of these blocks is required. The interface and
control block determines the state of the CDCE62005 at power-up based on the contents of the on-board
EEPROM. In addition to the EEPROM, the SPI port is available to configure the CDCE62005 by writing directly
to the device registers after power-up. The input block selects which of the three input ports is available for use
by the synthesizer block and buffers all clock inputs. The output block provides five separate clock channels that
are fully programmable and configurable to select and condition one of four internal clock sources. The
synthesizer block multiplies and filters the input clock selected by the input block.
NOTE:
This Section of the data sheet provides a high-level description of the features of the
CDCE62005 for purpose of understanding its capabilities. For a complete description
of device registers and I/O, please refer to the Device Configuration Section.
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s) :CDCE62005
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