ICS844011 datasheet(1/14 Pages) IDT

Part #	ICS844011

Description	FemtoClock Crystal-to-LVDS Clock Generator

PDF	14 Pages

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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DATA SHEET

ICS844011AG REVISION A AUGUST 27, 2012

1

FemtoClock® Crystal-to-LVDS

Clock Generator

ICS844011

General Description

The ICS844011 is a Fibre Channel Clock Generator. The

ICS844011 uses an 18pF parallel resonant crystal. For Fibre

Channel applications, a 26.5625MHz crystal is used. The

ICS844011 has excellent <1ps phase jitter performance, over the

637kHz - 10MHz integration range. The ICS844011 is packaged in a

small 8-pin TSSOP, making it ideal for use in systems with limited

board space.

Features

• One differential LVDS clock output pair

• Crystal interface designed for 18pF parallel resonant crystals

• VCO range: 490MHz – 680MHz

• RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal

(637kHz - 10MHz): 0.97ps (typical)

• RMS phase jitter @ 100MHz, (637kHz - 10MHz):

0.77ps (typical)

• Full 3.3V or 2.5V operating supply

• Available in lead-free (RoHS 6) package

• 0°C to 70°C ambient operating temperature

Common Configuration Table – Fibre Channel

Inputs

Output Frequency (MHz)

Crystal Frequency (MHz)

M

N

Multiplication Value M/N

26.5625

24

6

4

106.25

25

24

6

4

100

OSC

Phase

Detector

VCO

490MHz - 680MHz

M = ÷24 (fixed)

N = ÷6 (fixed)

Q

nQ

OE

XTAL_IN

XTAL_OUT

Pullup

1

2

3

4

8

7

6

5

VDDA

GND

XTAL_OUT

XTAL_IN

VDD

Q

nQ

OE

Block Diagram

Pin Assignment

ICS844011

8-lead TSSOP

4.40mm x 3.0mm x 0.925mm

package body

G Package

Top View

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