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Si5351A-Bxxxxx-GTR: 产品描述Clock Generators u0026 Support Products Any-Rate, Dual PLL 200 MHz Clock and I2C, 3 outputs with 50 output impedance, 10-MSOP (customized); 产品类别半导体模拟混合信号IC; 文件大小2MB，共41页; 制造商Silicon Laboratories

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Si5351A-Bxxxxx-GTR概述

Clock Generators u0026 Support Products Any-Rate, Dual PLL 200 MHz Clock and I2C, 3 outputs with 50 output impedance, 10-MSOP (customized)

Si5351A-Bxxxxx-GTR规格参数

参数名称	属性值
产品种类 Product Category	Clock Generators & Support Products
制造商 Manufacturer	Silicon Laboratories
系列 Packaging	Reel

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Si5351A/B/C-B

I

2

C - P

R O G R A M M A B L E

A

NY

-F

R E Q U E N C Y

C M O S C

LO CK

G

EN ER ATO R

+ V C X O

Features



www.silabs.com/custom-timing



Generates up to 8 non-integer-related

frequencies from 2.5 kHz to 200 MHz























I

2

C 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

10-MSOP

20-QFN

Applications



Ordering Information:

See page 29

HDTV, DVD/Blu-ray, set-top box



Audio/video equipment, gaming



Printers, scanners, projectors



Handheld Instrumentation



Residential gateways



Networking/communication



Servers, storage



XO replacement

Description

The Si5351 is an I

2

C 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

Si5351B (20-QFN)

XA

OSC

XB

VCXO

VC

PLL

MultiSynth

0

MultiSynth

1

MultiSynth

2

MultiSynth

3

MultiSynth

4

MultiSynth

5

MultiSynth

6

MultiSynth

7

VDDOA

R0

R1

R2

R3

R4

R5

R6

R7

CLK0

CLK1

VDDOB

CLK2

CLK3

VDDOC

CLK4

CLK5

VDDOD

CLK6

CLK7

SDA

SCL

INTR

OEB

Control

Logic

I

2

C

CLKIN

XA

OSC

XB

Si5351C (20-QFN)

PLL

A

PLL

B

MultiSynth

0

MultiSynth

1

MultiSynth

2

MultiSynth

3

MultiSynth

4

MultiSynth

5

MultiSynth

6

MultiSynth

7

VDDOA

R0

R1

R2

R3

R4

R5

R6

R7

CLK0

CLK1

VDDOB

CLK2

CLK3

VDDOC

CLK4

CLK5

VDDOD

CLK6

CLK7

SDA

SCL

OEB

SSEN

I

2

C

Control

Logic

Rev. 1.0 4/15

Copyright © 2015 by Silicon Laboratories

Si5351A/B/C-B

Si5351A/B/C-B

T

ABLE

Section

OF

C

ONTENTS

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2. Detailed Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1. Input Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2. Synthesis Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3. Output Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.4. Spread Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.5. Control Pins (OEB, SSEN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4. I2C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5. Configuring the Si5351 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1. Writing a Custom Configuration to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2. Si5351 Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.3. Replacing Crystals and Crystal Oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4. Replacing Crystals, Crystal Oscillators, and VCXOs . . . . . . . . . . . . . . . . . . . . . . . .20

5.5. Replacing Crystals, Crystal Oscillators, and PLLs . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.6. Applying a Reference Clock at XTAL Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.7. HCSL Compatible Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6. Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.1. Power Supply Decoupling/Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.2. Power Supply Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.3. External Crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.4. External Crystal Load Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.5. Unused Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.6. Trace Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7. Register Map Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

8. Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

9. Si5351 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9.1. Si5351A 20-pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

9.2. Si5351B 20-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

9.3. Si5351C 20-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

9.4. Si5351A 10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

10. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

11. Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

11.1. 20-pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

12. Land Pattern: 20-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.1. 10-Pin MSOP Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

13. Land Pattern: 10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

14.1. 20-Pin QFN Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

14.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

14.3. 10-Pin MSOP Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Rev. 1.0

3

Si5351A-Bxxxxx-GTR相似产品对比

	Si5351A-Bxxxxx-GTR	Si5351C-Bxxxxx-GMR	Si5351B-Bxxxxx-GMR
描述	Clock Generators u0026 Support Products Any-Rate, Dual PLL 200 MHz Clock and I2C, 3 outputs with 50 output impedance, 10-MSOP (customized)	Clock Generators u0026 Support Products Any-Rate, Dual PLL 200 MHz Clock with Dual Input and I2C, 8 outputs with 50 output impedance, 20-QFN (customized)	Clock Generators u0026 Support Products Any-Rate, Dual PLL 200 MHz Clock with VCXO and I2C, 8 outputs with 50 output impedance, 20-QFN (customized)
产品种类 Product Category	Clock Generators & Support Products	Clock Generators & Support Products	Clock Generators & Support Products
制造商 Manufacturer	Silicon Laboratories	Silicon Laboratories	Silicon Laboratories
系列 Packaging	Reel	Reel	Reel

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