AD9549 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD9549
Manufacturer

ADI
ChipWorker Part#

CW430795587
Description

Dual Input Network Clock Generator/Synchronizer
Documentation

Datasheet

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AD9549 Specifications

Attribute	Attribute Value

Part Number	AD9549
Manufacturer	ADI
ChipWorker Part#	CW430795587
Documentation	Datasheet
	expand all
Product Lifecycle Status	Recommended for New Designs

Product Description

Product Details
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 of −40°C to +85°C.
**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
### Features and Benefits
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
Please see Data Sheet for additional features.

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