Datasheet > XR81411EVB

XR81411EVB

更新时间： 2024-10-02 01:09:39

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
15页	427K
描述
Universal Quad Clock - High Frequency LVCMOS/LVDS/LVPECL Clock Synthesizer

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XR81411EVB 数据手册

XR81411

Universal Quad Clock - High Frequency

LVCMOS/LVDS/LVPECL Clock Synthesizer

General Description

FEATURES

• Small footprint 5mm x 5mm LGA package

• Configurable Outputs - As differential LVPECL/

LVDS pair or as a single ended LVCMOS.

• Crystal oscillator interface which can also be

overdriven using a single-ended reference clock

• Output frequency range: 10MHz - 800MHz

• Crystal/input frequency: 10MHz to 60MHz, paral-

lel resonant crystal

• VCO range: 2GHz - 3GHz

• Phase jitter @

- 125MHz (12KHz - 20MHz): <0.6ps RMS

- 125MHz (1.875MHz -20MHz): <0.25ps RMS

The XR81411 is a Quad Clock synthesizer with 4 independent PLLs in a

compact LGA-45 package. Each synthesizer generates ANY frequency in

the range of 10 MHz to 800MHz by utilizing a highly flexible delta sigma

modulator and a wide ranging VCO. The outputs are independently configu-

rable for single ended LVCMOS or differential LVDS or LVPECL. The clock

outputs have very low typical phase noise jitter of sub 0.6ps RMS, while

consuming extremely low power. The XR81411 uses a single reference and

provides 4 independent outputs that can be configured as needed to sup-

port a wide variety of applications.

Each of the XR81411’s 4 independent PLLs include an integer/fractional

divider, LVCMOS/LVDS/LVPECL output driver, 3.3V/2.5V supply, and gener-

ates one of four selectable output frequencies from a single reference. The

XR81411 is optimized for use with a fundamental mode 10MHz to 60MHz

crystal (or system clock) and generates a selection of output frequencies

ranging from 10MHz to 800MHz in either integer or fractional mode. In frac-

tional mode, frequency resolution of better than 2Hz steps can be achieved.

• 3.3V or 2.5V operating supply

• -40°C to 85°C ambient operating temperature

• Lead-free (RoHS 6) package

APPLICATIONS

• 10GE, GE LAN/WAN

• 2.5G/10G SONET/SDH/OTN

• xDSL, PCIe

• Low-jitter Clock Generation

• Synchronized clock systems

The application diagram below shows a typical LAN synthesizer configura-

tion with any standard crystal oscillating in fundamental mode.

The typical phase noise plot below shows the jitter integrated over the

12KHz to 20MHz range that is widely used in these systems.

Ordering Information – Last Page

Typical Application Diagram and Performance

PHASE NOISE

Qs=125MHz CMOS Output

XR81411

Q1=125MHz

Q2=125MHz

Q3=125MHz

Q4=125MHz

Xtal_In

LVCMOS *

(10-200MHz)

-20

-40

25MHz

Xtal_Out

LVPECL *

(10-800MHz)

-60

-80

LVDS *

(10-800MHz)

-100

-120

-140

-160

-180

Control

Pins

LVCMOS *

(10-200MHz)

(* Any Frequency, Any Output Format)

1.E+02

1.E+03

1.E+04

1.E+05

1.E+06

1.E+07

OFFSET FREQUENCY(Hz)

1 / 15

exar.com/XR81411

Rev 1A

12 3 4 5 6 7...15

中文翻译

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与XR81411EVB相关器件

型号	品牌	获取价格	描述	数据表
XR81411-F	EXAR	获取价格	Universal Quad Clock - High Frequency LVCMOS/LVDS/LVPECL Clock Synthesizer
XR81411TR-F	EXAR	获取价格	Universal Quad Clock - High Frequency LVCMOS/LVDS/LVPECL Clock Synthesizer
XR82C684	EXAR	获取价格	CMOS QUAD CHANNEL UART (QUART)
XR82C68444	EXAR	获取价格	CMOS QUAD CHANNEL UART (QUART)
XR82C684CJ	EXAR	获取价格	CMOS QUAD CHANNEL UART (QUART)
XR82C684CJ/44	EXAR	获取价格	CMOS QUAD CHANNEL UART (QUART)
XR-82C684CJ/44	EXAR	获取价格	Serial I/O Controller, 4 Channel(s), 0.125MBps, CMOS, PQCC44, PLASTIC, LCC-44
XR82C684CJ44	ETC	获取价格	Telecommunication IC
XR82C684CJ68	ETC	获取价格	Telecommunication IC
XR82C684CJ-F	EXAR	获取价格	CMOS Quad Channel UART(QUART)

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