CDCE62002 datasheet(40/49 Pages) TI

tên linh kiện	CDCE62002

Giải thích chi tiết về linh kiện	Four Output Clock Generator/Jitter Cleaner With Integrated Dual VCOs

PDF	49 Pages

Scroll/Zoom	100%

nhà sản xuất	TI [Texas Instruments]

Trang chủ	http://www.ti.com

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40 / 49 page

SERDES Startup and Clock Cleaner

SERDES

CleanedClock

Data

RecoveredClock

Output

Divider 0

U0P

U0N

Output

Divider 1

U1P

U1N

PFD/

Prescaler

Feedback

Divider

Input

Divider

Reference

Divider

REF_IN

XTAL /AUX_IN

EXT_LFP

EXT _LFN

CDCE62002

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

The CDCE62002 can serve as a SERDES device companion by providing a crystal based reference for the

SERDES device to lock to receive data stream and when the SERDES locks to the data and outputs the

recovered clock the CDCE62002 can switch and use the recovered clock and serve as a jitter cleaner.

Figure 34. CDCE62002 Clocking SERDES

Since the jitter of the recovered clock can be above 100 ps (RMS) the output jitter from CDCE62002 can be as

low and 6 ps (RMS) depending on the external loop filter configuration.

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