CDCE62005 datasheet(5/80 Pages) TI

Part #	CDCE62005

Description	Five/Ten Output Clock Generator/Jitter Cleaner With Integrated Dual VCOs

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Manufacturer	TI [Texas Instruments]

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Output

Divider0

U0P

U0N

U1P

U1N

U2P

U2N

U3P

U3N

U4P

U4N

PFD/

CP

/1:/2:HiZ

Prescaler

Feedback

Divder

Input

Divider

Reference

Divider

AUX

OUT

PRI_IN

SEC_IN

XTAL /

AUX_IN

EEPROM

Interface

&

Control

REF_SELECT

/Power_down

/SYNC

SPI_LE

SPI_CLK

SPI_MISO

SPI_MOSI

EXT_LFP

EXT_LFN

Output

Divider1

Output

Divider2

Output

Divider3

Output

Divider4

CDCE62005

www.ti.com

SCAS862C – NOVEMBER 2008 – REVISED FEBRUARY 2010

FUNCTIONAL DESCRIPTION

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.

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