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SI5351A Datasheet(PDF) 1 Page - Silicon Laboratories |
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SI5351A Datasheet(HTML) 1 Page - Silicon Laboratories |
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1 / 41 page  Rev. 1.0 4/15 Copyright © 2015 by Silicon Laboratories Si5351A/B/C-B Si5351A/B/C-B I 2C-P ROGRAMMABLE A NY-F REQUENCY CMOS C LOCK G ENERATOR + VCXO Features Applications Description 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). Functional Block Diagram www.silabs.com/custom-timing Generates up to 8 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 2 packages types: 10-MSOP: 3 outputs 20-QFN (4x4 mm): 8 outputs PCIE Gen 1 compatible Supports HCSL compatible swing HDTV, DVD/Blu-ray, set-top box Audio/video equipment, gaming Printers, scanners, projectors Handheld Instrumentation Residential gateways Networking/communication Servers, storage XO replacement R0 R1 CLK0 CLK1 VDDOA R2 R3 CLK2 CLK3 VDDOB R4 R5 CLK4 CLK5 VDDOC R6 R7 CLK6 CLK7 VDDOD MultiSynth 0 MultiSynth 1 MultiSynth 2 MultiSynth 3 MultiSynth 4 MultiSynth 5 MultiSynth 6 MultiSynth 7 PLL A PLL B XA XB OSC CLKIN SCL SDA Control Logic INTR OEB I 2C Si5351C (20-QFN) OSC XA XB PLL VCXO R0 R1 CLK0 CLK1 VDDOA R2 R3 CLK2 CLK3 VDDOB R4 R5 CLK4 CLK5 VDDOC R6 R7 CLK6 CLK7 VDDOD MultiSynth 0 MultiSynth 1 MultiSynth 2 MultiSynth 3 MultiSynth 4 MultiSynth 5 MultiSynth 6 MultiSynth 7 VC SCL SDA Control Logic OEB SSEN I 2C Si5351B (20-QFN) Ordering Information: See page 29 10-MSOP 20-QFN |
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