843242AGLFT

843242AGLFT Datasheet

843242

Part	Datasheet
843242AGLFT	843242AGLFT (pdf)

Related Parts	Information
843242AGLF	843242AGLF

PDF Datasheet Preview
Crystal-To-3.3V LVPECL Frequency Synthesizers 843242 DATASHEET The 843242 is a two differential output LVPECL Synthesizer designed to generate Ethernet reference clock frequencies. Using a 31.25MHz or 26.041666MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 4 frequency select pins SELA[1:0], SELB[1:0] 625MHz, 312.5MHz, 156.25MHz, and 125MHz. The two banks have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above. The 843242 IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 843242 is packaged in a small 16-pin TSSOP package. Pin Assignment • Two differential LVPECL output pairs • Using a 31.25MHz or 26.041666MHz crystal, the two output banks can be independently set for 625MHz, 312.5MHz, 156.25MHz or 125MHz • Crystal oscillator interface • RMS Phase Jitter 625MHz, 1.875MHz 20MHz using a 25MHz crystal 0.4ps typical • Full 3.3V supply mode • 0°C to 70°C ambient operating temperature • Lead-free RoHS 6 packaging nQB 1 VCCO_B SELB1 4 SELB0 5 VCCO_A nQA 8 16 XTAL_IN 15 XTAL_OUT 13 SELA1 12 SELA0 VCCA 9 FB_SEL 843242 16-pin, 4.4mm x 5.0mm TSSOP Package 173 mil SELA[1:0] 0 = Pullup 1 = Pulldown XTAL_IN XTAL_OUT 31.25MHz or 26.041666MHz FB_SEL SELB[1:0] Phase Detector 625MHz Pulldown 0 = Pulldown 1 = Pullup Feedback Divider 0 = ÷20 default 1 = ÷24 Block Diagram 0 ÷1 0 1 ÷2 1 0 ÷4 default 1 ÷5 0 ÷1 0 1 ÷2 1 0 ÷4 default 1 ÷5 QA nQA QB nQB 2015 Integrated Device Technology, Inc. Ordering Information Table Ordering Information Part/Order Number Marking Package Shipping Packaging Temperature 843242AGLF 843242AL 16-Lead TSSOP, Lead-Free Tube 0C to 70C 843242AGLFT 843242AL 16-Lead TSSOP, Lead-Free Tape & Reel 0C to 70C NOTE Parts that are ordered with an “G” suffix to the part number are the Pb-Free configuration and are RoHS compliant. CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZERS Description of Change Block Diagram - added output clock lables. Ordering Information table - added note. Deleted “ICS” prefix from part number throughout the datasheet. Updated datasheet header/footer. ICS843242 DATA SHEET Date 1/30/15 CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZERS Corporate Headquarters 6024 Silver Creek Valley Road San Jose, CA 95138 USA Sales 1-800-345-7015 or 408-284-8200 Fax 408-284-2775 Tech Support email: 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 applications involving extreme environmental conditions or 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. Product specification subject to change without notice. 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 2015 Integrated Device Technology, Inc.. All rights reserved.

PDF Datasheet Preview

Crystal-To-3.3V LVPECL Frequency Synthesizers
843242

DATASHEET

The 843242 is a two differential output LVPECL Synthesizer designed to generate Ethernet reference clock frequencies. Using a 31.25MHz or 26.041666MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 4 frequency select pins SELA[1:0], SELB[1:0] 625MHz, 312.5MHz, 156.25MHz, and 125MHz. The two banks have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above. The 843242 IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 843242 is packaged in a small 16-pin TSSOP package.

Pin Assignment
• Two differential LVPECL output pairs
• Using a 31.25MHz or 26.041666MHz crystal, the two output
banks can be independently set for 625MHz, 312.5MHz, 156.25MHz or 125MHz
• Crystal oscillator interface
• RMS Phase Jitter 625MHz, 1.875MHz 20MHz using a
25MHz crystal 0.4ps typical
• Full 3.3V supply mode
• 0°C to 70°C ambient operating temperature
• Lead-free RoHS 6 packaging
nQB 1

VCCO_B

SELB1 4

SELB0 5

VCCO_A
nQA 8
16 XTAL_IN
15 XTAL_OUT
13 SELA1
12 SELA0

VCCA
9 FB_SEL
843242
16-pin, 4.4mm x 5.0mm TSSOP Package 173 mil

SELA[1:0]
0 = Pullup
1 = Pulldown

XTAL_IN

XTAL_OUT 31.25MHz or
26.041666MHz

FB_SEL SELB[1:0]

Phase Detector
625MHz

Pulldown 0 = Pulldown 1 = Pullup

Feedback Divider 0 = ÷20 default 1 = ÷24

Block Diagram
0 ÷1 0 1 ÷2 1 0 ÷4 default 1 ÷5
0 ÷1 0 1 ÷2 1 0 ÷4 default 1 ÷5

QA nQA

QB nQB
2015 Integrated Device Technology, Inc.
Ordering Information
Table Ordering Information

Part/Order Number

Marking

Package

Shipping Packaging

Temperature
843242AGLF
843242AL
16-Lead TSSOP, Lead-Free

Tube
0C to 70C
843242AGLFT
843242AL
16-Lead TSSOP, Lead-Free

Tape & Reel
0C to 70C

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

CRYSTAL-TO-3.3V LVPECL

FREQUENCY SYNTHESIZERS

Description of Change
Block Diagram - added output clock lables. Ordering Information table - added note. Deleted “ICS” prefix from part number throughout the datasheet. Updated datasheet header/footer.

ICS843242 DATA SHEET

Date 1/30/15

CRYSTAL-TO-3.3V LVPECL

FREQUENCY SYNTHESIZERS

Corporate Headquarters 6024 Silver Creek Valley Road San Jose, CA 95138 USA

Sales 1-800-345-7015 or 408-284-8200 Fax 408-284-2775

Tech Support email:

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 applications involving extreme environmental conditions or 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. Product specification subject to change without notice. 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 2015 Integrated Device Technology, Inc.. 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 843242AGLFT Datasheet file may be downloaded here without warranties.

Datasheet ID: 843242AGLFT 636711