Datasheet > ICS842023I

ICS842023I

更新时间： 2024-11-02 11:14:35

品牌	Logo	应用领域
矽成 - ICSI		时钟发生器
页数	文件大小	规格书
9页	152K
描述
FEMTOCLOCKS? CRYSTAL-TO- HSTL CLOCK GENERATOR

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数据手册

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ICS842023I 数据手册

PRELIMINARY

ICS842023I

Integrated

Circuit

Systems, Inc.

FEMTOCLOCKS™ C RYSTAL-TO- HSTL

CLOCK GENERATOR

GENERAL DESCRIPTION

FEATURES

• (1) Differential HSTL output

The ICS842023I is an Ethernet Clock

ICS

Generator and a member of the HiPerClocks^TM

family of high performance devices from ICS.

For Ethernet applications, a 25MHz crystal is

used to generate 250MHz. The ICS842023I

HiPerClockS™

• Crystal oscillator interface, 18pF parallel resonant crystal

(24.5MHz - 34MHz)

• Output frequency range: 245MHz - 340MHz

• VCO range: 490MHz - 680MHz

uses ICS’ 3rd generation low phase noise VCO tech-

nology and can achieve <1ps rms phase jitter, easily

meeting Ethernet jitter requirements. The ICS842023I

is packaged in a small 8-pin TSSOP, making it ideal

for use in systems with limited board space.

• RMS phase jitter @ 250MHz, using a 25MHz crystal

(1.875Hz - 20MHz): 0.33ps (typical)

• 3.3V or 2.5V operating supply

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

COMMON CONFIGURATION TABLE - 1 Gb ETHERNET

Inputs

Output Frequency

(MHz)

Multiplication

Value M/N

Crystal Frequency (MHz)

250

BLOCK DIAGRAM

PIN ASSIGNMENT

Pullup

VDDA

GND

VDD

XTAL_OUT

XTAL_IN

nQ0

XTAL_IN

OSC

XTAL_OUT

VCO

Phase

Detector

N = ÷2 (fixed)

490MHz - 680MHz

nQ0

ICS842023I

8-Lead TSSOP

4.40mm x 3.0mm x 0.925mm

package body

M = ÷20 (fixed)

G Package

TopView

The Preliminary Information presented herein represents a product in prototyping or pre-production.The noted characteristics are based on initial

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

842023AGI

www.icst.com/products/hiperclocks.html

REV. B JUNE 14, 2005

12 3 4 5 6 7...9

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