Datasheet > 840004-01

840004-01

更新时间： 2024-11-25 01:11:55

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
15页	271K
描述
FemtoClock Crystal-to-LVCMOS/LVTTL Frequency Synthesizer

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中文翻译

获取价格

数据手册

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840004-01 数据手册

FemtoClock™ Crystal-to-LVCMOS/LVTTL

Frequency Synthesizer

840004-01

DATA SHEET

General Description

Features

The 840004-01 is a 4 output LVCMOS/LVTTL Synthesizer

optimized to generate Ethernet reference clock frequencies. Using

a 25MHz, 18pF parallel resonant crystal, the following frequencies

can be generated based on the 2 frequency select pins

(F_SEL1:0): 156.25MHz, 125MHz, and 62.5MHz. The 840004-01

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

can achieve 1ps or lower typical random rms phase jitter, easily

meeting Ethernet jitter requirements. The 840004-01 is packaged

in a small 20-pin TSSOP package.

• Four single-ended LVCMOS/LVTTL outputs

17 typical output impedance

• Selectable crystal oscillator interface or single-ended input

• Output frequency range: 56MHz - 175MHz

• VCO range: 560MHz - 700MHz

• RMS phase jitter at 156.25MHz (1.875MHz – 20MHz):

0.52ps (typical)

Phase Noise:

Offset

100Hz

1kHz

10kHz

100kHz

Noise Power

-94.9 dBc/Hz

-119.6 dBc/Hz

-128.9 dBc/Hz

-129.2 dBc/Hz

• Full 3.3V or mixed 3.3V core/2.5V output supply modes

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package

Frequency Select Function Table for Ethernet Frequencies

Inputs

F_SEL1

F_SEL0

M Div. Value

N Div. Value

M/N Ratio Value

Output Frequency (MHz), (25MHz Reference)

6.25

156.25

125

2.5

62.5

125 (default)

Pin Assignment

Block Diagram

Pullup

F_SEL0

20 F_SEL1

GND

Pullup:Pullup

F_SEL1:0

nXTAL_SEL

REF_CLK

Pulldown

nPLL_SEL

V^DDO

Pulldown

nXTAL_SEL

nPLL_SEL

14 Q3

25MHz

V_DDA

V_DD

GND

XTAL_IN

F_SEL1:0

12 XTAL_IN

OSC

XTAL_OUT

0 0 ÷4

840004-01

0 1 ÷5

Phase

Detector

Pulldown

REF_CLK

VCO

1 0 ÷10

20-Lead TSSOP

6.5mm x 4.4mm x 0.925mm

package body

1 1 ÷5 (default)

G Package

Top View

M = ÷25 (fixed)

Pulldown

840004-01 Rev B 4/2/15

12 3 4 5 6 7...15

中文翻译

下载PDF

与840004-01相关器件

型号	品牌	获取价格	描述	数据表
840004AG-01LF	IDT	获取价格	FemtoClock Crystal-to-LVCMOS/LVTTL Frequency Synthesizer
840004AG-01LFT	IDT	获取价格	FemtoClock Crystal-to-LVCMOS/LVTTL Frequency Synthesizer
840004AG-11	IDT	获取价格	Clock Generator, 140MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20
840004AGI-01LF	IDT	获取价格	Clock Generator, 175MHz, PDSO20, 6.5 X 4.4 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, LEAD FREE,
840004BGI	IDT	获取价格	Clock Generator, 226.66MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20
840004BGI-01	IDT	获取价格	Clock Generator, 175MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20
840004BGI-01T	IDT	获取价格	Clock Generator, 175MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20
840004BGILF	IDT	获取价格	Clock Generator, 226.66MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-15
840004BGILFT	IDT	获取价格	Clock Generator, 226.66MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-15
840004BGIT	IDT	获取价格	Clock Generator, 226.66MHz, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20

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