SI5351-B Datasheet, PDF (1/41 Pages) Silicon Laboratories – Supports static phase offset

Si5351A/B/C-B
I²C-PROGRAMMABLE ANY-FREQUENCY CMOS CLOCK
GENERATOR + VCXO
Features
 www.silabs.com/custom-timing
 Glitchless frequency changes
 Generates up to 8 non-integer-related  Separate voltage supply pins provide
frequencies from 2.5 kHz to 200 MHz
level translation:
 I²C user definable configuration
Core VDD: 2.5 or 3.3 V
 Exact frequency synthesis at each output ^{Output VDDO: 1.8, 2.5, or 3.3 V}
(0 ppm error)
 Excellent PSRR eliminates external
 Highly linear VCXO
power supply filtering
 Optional clock input (CLKIN)
 Very low power consumption
 Low output period jitter: < 70 ps pp, typ ^{ Adjustable output delay}
 Configurable spread spectrum selectable ^{ Available in 2 packages types:}
at each output
 10-MSOP: 3 outputs
 Operates from a low-cost, fixed frequency ^{ 20-QFN (4x4 mm): 8 outputs}
crystal: 25 or 27 MHz
 PCIE Gen 1 compatible
 Supports static phase offset
 Supports HCSL compatible swing
 Programmable rise/fall time control
Applications
 HDTV, DVD/Blu-ray, set-top box
 Audio/video equipment, gaming
 Printers, scanners, projectors
 Handheld Instrumentation
Description
 Residential gateways
 Networking/communication
 Servers, storage
 XO replacement
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).
10-MSOP
20-QFN
Ordering Information:
See page 29
Functional Block Diagram
Si5351B (20-QFN)
XA
OSC
PLL
XB
VCXO
VC
SDA
SCL
OEB
SSEN
I²C
Control
Logic
MultiSynth
0
R0
MultiSynth
1
R1
MultiSynth
2
R2
MultiSynth
3
R3
MultiSynth
4
R4
MultiSynth
5
R5
MultiSynth
6
R6
MultiSynth
7
R7
VDDOA
CLK0
CLK1
VDDOB
CLK2
CLK3
VDDOC
CLK4
CLK5
VDDOD
CLK6
CLK7
Si5351C (20-QFN)
XA
OSC
PLL
XB
A
PLL
CLKIN
B
SDA
SCL
INTR
OEB
I²C
Control
Logic
MultiSynth
0
R0
MultiSynth
1
R1
MultiSynth
2
R2
MultiSynth
3
R3
MultiSynth
4
R4
MultiSynth
5
R5
MultiSynth
6
R6
MultiSynth
7
R7
VDDOA
CLK0
CLK1
VDDOB
CLK2
CLK3
VDDOC
CLK4
CLK5
VDDOD
CLK6
CLK7
Rev. 1.0 4/15
Copyright © 2015 by Silicon Laboratories
Si5351A/B/C-B