SI5351A-B-GTR

The Si5351 is an I²C configurable clock generator that is ideally suited for replacing crystals, crystal oscillators, VCXOs, phase-locked loops (PLLs), and fanout buffers in cost-sensitive applications. Based on a PLL/VCXO + high resolution MultiSynth fractional divider architecture, the Si5351 can generate any frequency up to 200 MHz on each of its outputs with 0 ppm error. Three versions of the Si5351 are available to meet a wide variety of applications. The Si5351A generates up to 8 free-running clocks using an internal oscillator for replacing crystals and crystal oscillators. The Si5351B adds an internal VCXO and provides the flexibility to replace both free-running clocks and synchronous clocks. It eliminates the need for higher cost, custom pullable crystals while providing reliable operation over a wide tuning range. The Si5351C offers the same flexibility but synchronizes to an external reference clock (CLKIN).

Applications

• Audio/video equipment, gaming
• Printers, scanners, projectors
• Handheld Instrumentation
• Laser range finder
• Residential gateways
• Networking/communication
• Servers, storage
• XO replacement

Key features

• Generates up to eight non-integer related frequencies from 2.5 kHz to 200 MHz
• I²C user definable configuration
• Exact frequency synthesis at each output (0 ppm error)
• Highly linear VCXO
• Optional clock input (CLKIN)
• Low output period jitter: < 70 ps pp, typ
• Configurable spread spectrum selectable at each output
• Operates from a low-cost, fixed frequency crystal: 25 or 27 MHz
• Supports static phase offset
• Programmable rise/fall time control
• Glitchless frequency changes
• Separate voltage supply pins provide level translation:
• Core VDD: 2.5 or 3.3 V
• Output VDDO: 1.8, 2.5, or 3.3 V
• Excellent PSRR eliminates external power supply filtering
• Very low power consumption
• Adjustable output delay
• Available in three packages types:
• 10-MSOP: 3 outputs
• 16-QFN (3x3 mm): 4 outputs
• 20-QFN (4x4 mm): 8 outputs
• PCIE Gen 1 compatible
• Supports HCSL compatible swing