Datasheet > 843004I-01

843004I-01

更新时间： 2024-02-10 00:09:30

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
19页	406K
描述
FemtoClock Crystal-to-3.3V, 2.5V LVPECL Frequency Synthesizer

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中文翻译

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数据手册

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843004I-01 数据手册

FemtoClock Crystal-to-3.3V, 2.5V

843004I-01

LVPECL Frequency Synthesizer

General Description

Features

The 843004I-01 is a 4 output LVPECL synthesizer optimized to

generate Ethernet reference clock frequencies. Using a 25MHz

18pF parallel resonant crystal, the following frequencies can be

generated based on the settings of 2 frequency select pins

(F_SEL[1:0]): 156.25MHz, 125MHz, 62.5MHz. The 843004I-01 uses

IDT’s 3^rdgeneration low phase noise VCO technology and can

achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet

jitter requirements. The 843004I-01 is packaged in a small 24-pin

TSSOP package.

• Four 3.3V differential LVPECL output pairs

• Selectable crystal oscillator interface

or LVCMOS/LVTTL single-ended clock input

• Supports the following output frequencies: 156.25MHz, 125MHz,

62.5MHz

• VCO range: 560MHz – 680MHz

• RMS phase jitter @ 156.25MHz, using a 25MHz crystal

(1.875MHz – 20MHz): 0.54ps (typical)

• Full 3.3V or 2.5V supply modes

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

• Lead-free (RoHS 6) package

Frequency Select Function Table

Inputs

Output Frequency (MHz)

F_SEL1

F_SEL0

M Div. Value

N Div. Value

M/N Div. Value

(25MHz Reference)

6.25

156.25

125

2.5

62.5

Not Used

Block Diagram

Pin Assignment

Pulldown

nQ2

F_SEL[1:0]

nQ1

Pulldown

nPLL_SEL

VCCO

V_CCO

F_SEL[1:0]

nQ3

VEE

VCC

nQ0

nPLL_SEL

Pulldown

nQ0

0 0 ÷4

TEST_CLK

0 1 ÷5

1 0 ÷10

1 1 ^{not used}

VCO

625MHz

(w/25MHz

Reference)

nXTAL_SEL

XTAL_IN

OSC

nQ1

Phase

Detector

V_CCA

F_SEL0

V_CC

TEST_CLK

VEE

XTAL_IN

XTAL_OUT

F_SEL1

Pulldown

nXTAL_SEL

843004I-01

24-Lead TSSOP

nQ2

M = 25 (fixed)

4.4mm x 7.8mm x 0.925mm

package body

G Package

nQ3

Pulldown

Top View

January 18, 2016

12 3 4 5 6 7...19

中文翻译

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