CDCE62002 datasheet(4/49 Pages) TI

Part #	CDCE62002

Description	Four Output Clock Generator/Jitter Cleaner With Integrated Dual VCOs

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Manufacturer	TI [Texas Instruments]

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FUNCTIONAL DESCRIPTION

PD

SPI_LE

SPI _CLK

SPI _MOSI

SPI _MISO

Output

Divider 0

U0 P

U0N

Output

Divider 1

U1 P

U1N

PFD /

CP

Prescaler

Feedback

Divider

Input

Divider

Reference

Divider

REF_IN

XTAL /

AUX _IN

EEPROM

Interface

&

Control

EXT _LFP

EXT _LFN

CDCE62002

SCAS882A – JUNE 2009 – REVISED JULY 2009.............................................................................................................................................................. www.ti.com

Figure 2. CDCE62002 Block Diagram

The CDCE62002 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 CDCE62002 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 CDCE62002 by writing directly

to the device registers after power-up. The input block selects which of the two input ports is available for use by

the synthesizer block. The output block provides two separate clock channels that are fully programmable. 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

CDCE62002 for purpose of understanding its capabilities. For a complete description

of device registers and I/O, refer to the Device Configuration Section.

4

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