Datasheet > IDT5T940

IDT5T940

更新时间： 2024-11-01 22:18:51

品牌	Logo	应用领域
艾迪悌 - IDT		时钟发生器
页数	文件大小	规格书
10页	68K
描述
PRECISION CLOCK GENERATOR OC-192 APPLICATIONS

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IDT5T940 数据手册

IDT5T940

INDUSTRIALTEMPERATURERANGE

PRECISIONCLOCKGENERATOROC-192APPLICATIONS

IDT5T940

PRECISION CLOCK GENERATOR

OC-192 APPLICATIONS

FEATURES:

DESCRIPTION:

• Input frequency:

The IDT5T940 generates a high precision FEC (Forward Error Cor-

rection) or non-FEC source clock for SONET/SDH systems as well as a

source clock for Gigabit Ethernet systems. This device also has clock

regeneration capability: it creates a "clean" version of the clock input by

using the internal oscillator to square the input clock's rising and falling

edges and remove jitter. In the event that the main clock input fails, the

device automatically locks to a backup reference clock using a hitless

switchover mechanism.

- ForSONETnon-FEC:19.44MHz,38.88MHz,77.76MHz,155.52MHz,

311.04MHz, or 622.08MHz

- For SONET FEC: 20.83MHz, 41.66MHz, 83.31MHz, 166.63MHz,

333.26MHz, or 666.52MHz

- For 10GE copper: 19.53MHz, 39.06MHz, 78.125MHz, 156.25MHz,

312.5MHz, or 625MHz

- For 10GE optical: 20.14MHz, 40.28MHz, 80.56MHz, 161.13MHz,

322.26MHz, or 644.53MHz

• 3-level inputs for feedback divide ratio and output frequency range

selection

• 1x, 2x, 4x, 8x, 16x, and 32x outputs on Q^OUT

• Regenerated input clock or QOUT/4 on QREG

• Lock indicator

This device detects loss of valid CLKIN and leaves the VCO of the PLL at

thelastvalidfrequencywhileanalternateinputREFINisselected. IfCLKIN

andREFINaredifferentfrequencies,themultiplicationfactorwillbeadjustedto

retainthesameoutputfrequency.

TheIDT5T940canactasatranslatorfromadifferentialLVPECL,LVDS,or

single-ended LVTTL input to LVPECL or LVDS outputs. The IDT5T940-10

has LVDS outputs and the IDT5T940-30 has LVPECL outputs.

ThethreemodesofoutputfrequencyrangearecontrolledbytheSELmode,

whichisa3-levelpin. WhenSELmodeishighorlow,theQ^OUTisamultiplied

versionoftheinputclockwhileQREGisaregeneratedversionoftheinputclock.

WhenSELmodeismid,theQOUT isamultipliedversionoftheinputclockwhile

QREG isQOUT/4.

• Power-down mode

• LVPECL or LVDS outputs

• Three modes of output frequency range

- Mode0:QOUT range155.5-166.6MHz. QREG isaregeneratedversion

of the input clock.

- Mode 1: QOUT range 622 - 666.5MHz. QREG output 155.5-166.6MHz.

- Mode 2: QOUT range 622 - 666.5MHz. QREG is a regenerated version

of the input clock frequency.

TheIDT5T940featuresaselectableloopbandwidth.

• Selectable loop bandwidths

• Hitless switchover

• Differential LVPECL, LVDS, or single-ended LVTTL input interface

• 2.375 - 3.465V core and I/O

APPLICATIONS:

• Terabit routers

• Gigabit ethernet systems

• SONET / SDH systems

• Digital cross connects

• Optical transceiver modules

• Available in VFQFPN package

FUNCTIONALBLOCKDIAGRAM

PLLBW1

PLLBW0

QREG

CLKIN

INPUT

MUX

DIVN

DIVM

PLL

QOUT

CONTROL

LOGIC

LOCK,

FREQ.

DETECTOR

REFIN

SELMODE

LOCK

CLK/

REF0

CLK/

REF1

TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.

INDUSTRIAL TEMPERATURE RANGE

DECEMBER 2003

2003 Integrated Device Technology, Inc.

DSC 6195/23

12 3 4 5 6 7...10

中文翻译

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与IDT5T940相关器件

型号	品牌	获取价格	描述	数据表
IDT5T940-10NLI	IDT	获取价格	PRECISION CLOCK GENERATOR OC-192 APPLICATIONS
IDT5T940-10NLI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 2 True Output(s), 0 Inverted Output(s), PQCC28, PLASTIC
IDT5T940-30NLGI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 2 True Output(s), 0 Inverted Output(s), PQCC28, GREEN,
IDT5T940-30NLI	IDT	获取价格	PRECISION CLOCK GENERATOR OC-192 APPLICATIONS
IDT5T940-30NLI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 2 True Output(s), 0 Inverted Output(s), PQCC28, PLASTIC
IDT5T9820NLGI	IDT	获取价格	PLL Based Clock Driver, 5T Series, 10 True Output(s), 0 Inverted Output(s), GREEN, PLASTIC
IDT5T9820NLI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 10 True Output(s), 0 Inverted Output(s), PQCC68, PLASTI
IDT5T9821NLGI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 5 True Output(s), 0 Inverted Output(s), GREEN, PLASTIC,
IDT5T9890NLGI	IDT	获取价格	PLL Based Clock Driver, 5T Series, 10 True Output(s), 0 Inverted Output(s), PQCC68, GREEN,
IDT5T9890NLGI8	IDT	获取价格	PLL Based Clock Driver, 5T Series, 10 True Output(s), 0 Inverted Output(s), PQCC68, GREEN,

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