Datasheet > ICS843N571I

ICS843N571I

更新时间： 2024-11-04 11:14:39

品牌	Logo	应用领域
艾迪悌 - IDT		时钟
页数	文件大小	规格书
23页	1784K
描述
FemtoClock NG? Clock Synthesizer

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数据手册

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ICS843N571I 数据手册

FemtoClock NG^®Clock Synthesizer

ICS843N571I

DATA SHEET

General Description

Features

The ICS843N571I is a PLL based clock synthesizer for use in

Ethernet applications. The device uses IDT’s fourth generation

FemtoCLock^®NG technology for optimal high clock frequency and

low phase noise performance, combined with a low power

consumption and high power supply noise rejection. Using IDT’s

latest FemtoClock NG PLL technology, the ICS843N571I achieves

<0.3ps RMS phase jitter performance.

• Fourth generation FemtoClock^®Next Generation (NG) technology

• Seven single-ended LVCMOS outputs, 30Ω output impedance

• Three LVPECL output pairs

One differential LVPECL (QA, nQA) output pair: 156.25MHz

Two selectable differential LVPECL output pairs (QB, nQB and

QC, nQC): 100MHz and 125MHz

• One single-ended LVCMOS (QD0) 33.33MHz CPU clock

• Selectable external crystal or single-ended input source

ICS843N571I can synthesize 100MHz, 125MHz, 156.25MHz and a

low frequency 33.33MHz CPU clock from a single device. Six

LVCMOS outputs also serve as additional buffering of the 25MHz

crystal reference.

• Crystal oscillator interface designed for 25MHz, parallel resonant

crystal

• FemtoClock NG frequency multiplier provides low jitter, high

frequency output

• FemtoClock NG VCO frequency: 2.5GHz

• RMS phase jitter @ 125MHz, using a 25MHz crystal

(12kHz – 20MHz): 0.283ps (typical)

• Power supply noise rejection PSNR: -80dB

• 3.3V supply voltage

• -40C to 85C ambient operating temperature

• Available in lead-free (RoHS 6) packages

Pin Assignment

40 39 38 37 36 35 34 33 32 31

QREF3

QREF2

V_EE

V_CC

QREF0

QREF1

V_CC

XTAL_IN

ICS843N571I

V_CC

FREQSEL

V_CC

QD0

nQC

40-Lead VFQFN

6mm x 6mm x 0.925mm

package body

K Package

XTAL_OUT

REFCLK

REFSEL

V_EE

Top View

11 12 13 14 15 16 17 18 19 20

ICS843N571AKI REVISION A SEPTEMBER 29, 2011

12 3 4 5 6 7...23

中文翻译

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