SI53312-B-GM datasheet, PDF - EEWORLD Datasheet

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SI53312-B-GM: Description时钟扇出缓冲器（分配），多路复用器，变换器 IC 2：10 1.25 GHz 44-VFQFN 裸露焊盘; Categorysemiconductor clock and timing; File Size2MB，33 Pages; ManufacturerSkyworks; Websitehttp://www.skyworksinc.com

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SI53312-B-GM Overview

时钟扇出缓冲器（分配），多路复用器，变换器 IC 2：10 1.25 GHz 44-VFQFN 裸露焊盘

SI53312-B-GM Parametric

Parameter Name	Attribute value
category
Maker	Skyworks
series	-
Package	tray
type	fanout buffers (distribution), multiplexers, converters
Number of circuits	1
Ratio - Input:Output	2：10
Differential - Input:Output	Yes Yes
enter	CML，HCSL，LVCMOS，LVDS，LVPECL
output	CML，HCSL，LVCMOS，LVDS，LVPECL
Frequency - maximum	1.25 GHz
Voltage - Power supply	1.71V ~ 3.63V
Operating temperature	-40°C ~ 85°C
Installation type	surface mount type
Package/casing	44-VFQFN Exposed Pad
Supplier device packaging	44-QFN（7x7）
Basic product number	SI53312

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Si53312

1 : 1 0 L

O W

I T T E R

N IV ER SA L

U F F E R

/ L

EVEL

R A N S L ATO R W I T H

2 : 1 I

N PU T

( < 1 . 2 5 G H

)

Features



10 differential or 20 LVCMOS outputs



Ultra-low additive jitter: 45 fs rms



Wide frequency range:

dc to 1.25 GHz



Any-format input with pin selectable

output formats: LVPECL, Low Power



LVPECL, LVDS, CML, HCSL,

LVCMOS



2:1 mux with hot-swappable inputs

Asynchronous output enable



Output clock division: /1, /2, /4



(/2 and /4 for dc to 725 MHz)



Low output-output skew: <70 ps

Low propagation delay variation:

<400 ps

Independent V

and V

DDO

1.8/2.5/3.3 V

Excellent power supply noise

rejection (PSRR)

Selectable LVCMOS drive strength to

tailor jitter and EMI performance

Small size: 44-QFN (7 mm x 7 mm)

RoHS compliant, Pb-free

Industrial temperature range:

–40 to +85 °C

Ordering Information:

See page 28.

Applications



Pin Assignments



High-speed clock distribution

Ethernet switch/router

Optical Transport Network (OTN)

SONET/SDH

PCI Express Gen 1/2/3

Storage

Telecom

Industrial

Servers

Backplane clock distribution

DIVA

Si53312

VDDOA

VDDOB

GND

DIVB

SFOUTB[1]

SFOUTB[0]

CLK_SEL

Description

The Si53312 is an ultra low jitter ten output differential buffer with pin-selectable

output clock signal format and divider selection. The Si53312 features a 2:1 mux,

making it ideal for redundant clocking applications. The Si53312 utilizes Skyworks

Solutions' advanced CMOS technology to fanout clocks from dc to 1.25 GHz with

guaranteed low additive jitter, low skew, and low propagation delay variability. The

Si53312 features minimal cross-talk and provides superior supply noise rejection,

simplifying low jitter clock distribution in noisy environments. Independent core

and output bank supply pins provide integrated level translation without the need

for external circuitry.

SFOUTA[1]

SFOUTA[0]

GND

PAD

VDD

CLK0

OEA

REF

OEB

CLK1

Patents pending

Functional Block Diagram

Power

Supply

Filtering

REF

Vref

Generator

DIVA

VDDOA

SFOUTA[1:0]

OEA

Q0, Q1, Q2, Q3, Q4

DivA

CLK0

/CLK0

Q0, Q1, Q2, Q3, Q4

DIVB

CLK1

/CLK1

DivB

CLK_SEL

Switching

Logic

Q5, Q6, Q7, Q8, Q9

VDDOB

SFOUTB[1:0]

OEB

Q5, Q6, Q7, Q8, Q9

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Rev. 1.0 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 3, 2021

CLK1

GND

Si53312

ABLE O F

ONTENTS

Section

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1. Universal, Any-Format Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2. Input Bias Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.3. Voltage Reference (VREF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4. Universal, Any-Format Output Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5. Input Mux and Output Enable Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.6. Flexible Output Divider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.7. Power Supply (V

and V

DDOX

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8. Output Clock Termination Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2.9. AC Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.10. AC Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.11. Typical Phase Noise Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.12. Input Mux Noise Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.13. Power Supply Noise Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3. Pin Description: 44-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.1. 7x7 mm 44-QFN Package Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6. PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

6.1. 7x7 mm 44-QFN Package Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.1. Si53312 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Rev. 1.0 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 3, 2021

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