AD9549
RECOMMENDED FOR NEW DESIGNSDual Input Network Clock Generator/Synchronizer
- Part Models
- 2
- 1ku List Price
- Starting From $17.74
Part Details
- 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 of >400 MHz
- Single-ended CMOS output for frequencies of <150 MHz
- Programmable digital loop filter (<1 Hz to ~100 kHz)
- High speed digitally controlled oscillator (DCO) core
- Direct digital synthesizer (DDS) with integrated 14-bit DAC
- Excellent dynamic performance
- Programmable 16 + 1-bit feedback divider, S
- Software controlled power-down
- Available 64-lead LFCSP package
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
Documentation
Data Sheet 1
Application Note 9
Technical Articles 6
Frequently Asked Question 1
Product Selection Guide 1
Webcast 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD9549ABCPZ | 64-Lead LFCSP (9mm x 9mm w/ EP) | ||
| AD9549ABCPZ-REEL7 | 64-Lead LFCSP (9mm x 9mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 9, 2021 - 20_0126 Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea |
||
| AD9549ABCPZ | PRODUCTION | |
| AD9549ABCPZ-REEL7 | PRODUCTION | |
|
Oct 22, 2010 - 10_0261 AD9549A mask change |
||
| AD9549ABCPZ | PRODUCTION | |
| AD9549ABCPZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Tools & Simulations
AD9549 IBIS Models 1
Evaluation Kits
AD9549 Evaluation Board