AD9549 datasheet(1/78 Pages) AD

Teilenummer	AD9549

Bauteilbeschribung	Dual Input Network Clock Generator/Synchronizer

PDF	78 Pages

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Hersteller	AD [Analog Devices]

Direct Link	http://www.analog.com

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Dual Input Network Clock

Generator/Synchronizer

Preliminary Technical Data

AD9549

Rev. PrA

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

FEATURES

Flexible Reference Inputs

Input frequencies 8 kHz to 750 MHz

Two reference inputs

Loss of Reference indicators

Auto and Manual Holdover modes

Auto and Manual Switchover modes

Smooth A to B phase transition on outputs

Excellent stability in holdover mode

Programmable 16+1-bit Input Divider, R

Differential HSTL Clock Output

Output frequencies to 750 MHz

Low Jitter clock doubler for frequencies > 400 MHz

Single-ended CMOS output; frequencies < 50MHz

Programmable Digital Loop Filter (< 1 Hz to ~100 kHz)

High Speed Digitally Controlled Oscillator (DCO) core

DDS with integrated 14 bit DAC

Excellent Dynamic Performance

Programmable 16+1-bit Feedback Divider, S

Software controlled power-down

64-lead LFCSP package

APPLICATIONS

Network Synchronization

Reference Clock Jitter Cleanup

SONET/SDH Clocks up to OC-192, Including FEC

Stratum 3/3E Reference Clocks

Wireless Base Stations, Controllers

Cable Infrastructure

Data Communications

GENERAL DESCRIPTION

The AD9549 provides synchronization for many systems

including synchronous optical networks (SONET/SDH). The

AD9549 generates an output clock, synchronized to one of two

external input references. The external references may contain

significant time jitter, also specified as phase noise. Using a

digitally controlled loop and holdover circuitry, the AD9549

continues to generate a clean (low jitter), valid output clock

during a ‘loss of reference’ condition, even when both references

have failed.

The AD9549 operates over an industrial temperature range,

spanning -40°C to +85°C.

Figure 1: Basic Block Diagram

Ähnliche Beschreibung - AD9549

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Analog Devices	AD9547	1Mb / 104P	Dual/Quad Input Network Clock Generator/Synchronizer REV. 0
	AD9548	1Mb / 112P	Quad/Octal Input Network Clock Generator/Synchronizer REV. 0
	AD9549ABCPZ	1Mb / 76P	Dual Input Network Clock Generator/Synchronizer REV. D
	AD9549	1Mb / 76P	Dual Input Network Clock Generator/Synchronizer Rev. D
Pericom Semiconductor C...	PI6C557-10	378Kb / 6P	Network Clock Generator
Pericom Semiconductor C...	PI6LC4830	1Mb / 11P	HiFlex Network Clock Generator
Raltron Electronics Cor...	SY02-HP2O	170Kb / 5P	LOW INPUT/ HIGH DUAL OUTPUT FREQUENCY CLOCK/SYNCHRONIZER
Analog Devices	AD9547	1Mb / 106P	Dual/Quad Input Network Clock Generator/Synchronizer 11/14-Rev. F to Rev. G
Analog Devices	AD9548	1Mb / 111P	Quad/Octal Input Network Clock Generator/Synchronizer 12/14-Rev. F to Rev. G
Renesas Technology Corp	8V19N850D	3Mb / 175P	Radio Unit Clock Synchronizer and Converter Clock Generator February 13, 2023

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