ICS841N254AKILF

ICS841N254AKILF Datasheet

ICS841N254I

Part	Datasheet
ICS841N254AKILF	ICS841N254AKILF (pdf)

Related Parts	Information
ICS841N254AKILFT	ICS841N254AKILFT

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NG Crystal-to-LVDS/HCSL Clock Synthesizer ICS841N254I DATA SHEET The ICS841N254I is a 4-output clock synthesizer designed for S-RIO and reference clock applications. The device generates four copies of a selectable 250MHz, 156.25MHz, 125MHz or 100MHz clock signal with excellent phase jitter performance. The four outputs are organized in two banks of two LVDS and two HCSL ouputs.The device uses IDT’s fourth generation NG technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. The synthesized clock frequency and the phase-noise performance are optimized for driving RIO and SerDes reference clocks. The device supports 3.3V and 2.5V voltage supplies and is packaged in a small 32-lead VFQFN package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements. Function Table Inputs F_SEL1 F_SEL0 0 default 0 default Output Frequency with fXTAL = 25MHz 156.25MHz 125MHz 100MHz 250MHz NOTE F_SEL[1:0] are asynchronous controls. Block Diagram • Fourth generation NG technology • Selectable 250MHz, 156.25MHz, 125MHz or 100MHz output clock synthesized from a 25MHz fundamental mode crystal • Four differential clock outputs two LVDS and two HCSL outputs • Crystal interface designed for 25MHz, parallel resonant crystal • RMS phase jitter 156.25MHz, using a 25MHz crystal 1MHz - 20MHz 0.27ps typical • RMS phase jitter 156.25MHz, using a 25MHz crystal 12kHz - 20MHz 0.32ps typical • Power supply noise rejection PSNR -50dB typical • LVCMOS interface levels for the frequency select input • Full 3.3V or 2.5V supply voltage • Available in both standard RoHS 5 and Lead-free RoHS 6 packages • -40°C to 85°C ambient operating temperature VDD GND QB0 nQB0 VDDOB QB1 nQB1 GND Pin Assignment 32 31 30 29 28 27 26 25 VDD 1 24 IREF ICS841N254I 23 GND VDDA 3 nc 4 32-lead VFQFN K Package 22 nQA0 21 QA0 GND 5 5mm x 5mm x 0.925mm 20 VDDOA package body REF_CLK 6 Top View 19 nQA1 nOEA 7 18 QA1 VDD 8 Table Ordering Information Part/Order Number 841N254AKI 841N254AKIT 841N254AKILF 841N254AKILFT Marking ICS41N254AI ICS1N254AI ICS1N254AIL Package 32 Lead VFQFN 32 Lead VFQFN “Lead-Free” 32 Lead VFQFN “Lead-Free” 32 Lead VFQFN Shipping Packaging Tray 2500 Tape & Reel Tray 2500 Tape & Reel Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C NOTE Parts that are ordered with an “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial and industrial applications. Any other applications, such as those requiring high reliability or other extraordinary environmental requirements are not recommended without 2011 Integrated Device Technology, Inc. ICS841N254I Data Sheet NG CRYSTAL-TO-LVDS/HCSL CLOCK SYNTHESIZER 6024 Silver Creek Valley Road San Jose, California 95138 Sales 800-345-7015 inside USA +408-284-8200 outside USA Fax 408-284-2775 Technical Support +480-763-2056 DISCLAIMER Integrated Device Technology, Inc. IDT and its subsidiaries reserve the right to modify the products and/or specifications described herein at any time and at IDT’s sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT’s products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties. IDT’s products are not intended for use in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT. Integrated Device Technology, IDT and the IDT logo are registered trademarks of IDT. Other trademarks and service marks used herein, including protected names, logos and designs, are the property of IDT or their respective third party owners. Copyright All rights reserved.

PDF Datasheet Preview

NG Crystal-to-LVDS/HCSL Clock Synthesizer

ICS841N254I

DATA SHEET

The ICS841N254I is a 4-output clock synthesizer designed for S-RIO and reference clock applications. The device generates four copies of a selectable 250MHz, 156.25MHz, 125MHz or 100MHz clock signal with excellent phase jitter performance. The four outputs are organized in two banks of two LVDS and two HCSL ouputs.The device uses IDT’s fourth generation NG technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. The synthesized clock frequency and the phase-noise performance are optimized for driving RIO and SerDes reference clocks. The device supports 3.3V and 2.5V voltage supplies and is packaged in a small 32-lead VFQFN package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements.

Function Table

Inputs

F_SEL1

F_SEL0
0 default
0 default

Output Frequency with fXTAL = 25MHz 156.25MHz 125MHz 100MHz 250MHz

NOTE F_SEL[1:0] are asynchronous controls.

Block Diagram
• Fourth generation NG technology
• Selectable 250MHz, 156.25MHz, 125MHz or 100MHz output
clock synthesized from a 25MHz fundamental mode crystal
• Four differential clock outputs two LVDS and two HCSL outputs
• Crystal interface designed for 25MHz,
parallel resonant crystal
• RMS phase jitter 156.25MHz, using a 25MHz crystal
1MHz - 20MHz 0.27ps typical
• RMS phase jitter 156.25MHz, using a 25MHz crystal
12kHz - 20MHz 0.32ps typical
• Power supply noise rejection PSNR -50dB typical
• LVCMOS interface levels for the frequency select input
• Full 3.3V or 2.5V supply voltage
• Available in both standard RoHS 5 and Lead-free RoHS 6
packages
• -40°C to 85°C ambient operating temperature

VDD GND QB0 nQB0 VDDOB QB1 nQB1 GND

Pin Assignment
32 31 30 29 28 27 26 25

VDD 1
24 IREF

ICS841N254I
23 GND

VDDA 3 nc 4
32-lead VFQFN K Package
22 nQA0 21 QA0

GND 5 5mm x 5mm x 0.925mm 20 VDDOA package body

REF_CLK 6

Top View
19 nQA1
nOEA 7
18 QA1

VDD 8
Table Ordering Information

Part/Order Number 841N254AKI 841N254AKIT 841N254AKILF 841N254AKILFT

Marking ICS41N254AI ICS1N254AI ICS1N254AIL

Package 32 Lead VFQFN 32 Lead VFQFN “Lead-Free” 32 Lead VFQFN “Lead-Free” 32 Lead VFQFN

Shipping Packaging Tray
2500 Tape & Reel Tray
2500 Tape & Reel

Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C

NOTE Parts that are ordered with an “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.

While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial and industrial applications. Any other applications, such as those requiring high reliability or other extraordinary environmental requirements are not recommended without
2011 Integrated Device Technology, Inc.

ICS841N254I Data Sheet

NG CRYSTAL-TO-LVDS/HCSL CLOCK SYNTHESIZER
6024 Silver Creek Valley Road San Jose, California 95138

Sales
800-345-7015 inside USA +408-284-8200 outside USA

Fax 408-284-2775

Technical Support
+480-763-2056

DISCLAIMER Integrated Device Technology, Inc. IDT and its subsidiaries reserve the right to modify the products and/or specifications described herein at any time and at IDT’s sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT’s products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties.

IDT’s products are not intended for use in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT.

Integrated Device Technology, IDT and the IDT logo are registered trademarks of IDT. Other trademarks and service marks used herein, including protected names, logos and designs, are the property of IDT or their respective third party owners.

Copyright All rights reserved.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ICS841N254AKILF Datasheet file may be downloaded here without warranties.

Datasheet ID: ICS841N254AKILF 637093