3.3V Zero Delay Clock Multiplier

The 2308B is a high-speed phase-lock loop (PLL) clock multiplier. It is designed to address high-speed clock distribution and multiplication applications. The zero delay is achieved by aligning the phase between the incoming clock and the output clock, operable within the range of 10 to 133MHz. The 2308B has two banks of four outputs each that are controlled via two select addresses. By proper selection of input addresses, both banks can be put in tri-state mode. In test mode, the PLL is turned off, and the input clock directly drives the outputs for system testing purposes. In the absence of an input clock, the 2308B enters power down, and the outputs are tri-stated. In this mode, the device will draw less than 25uA. The 2308B is available in six unique configurations for both prescaling and multiplication of the Input REF Clock. (See available options table.) The PLL is closed externally to provide more flexibility by allowing the user to control the delay between the input clock and the outputs. The 2308B is characterized for both Industrial and Commercial operation.

Features

  • Phase-Lock Loop Clock Distribution for Applications ranging from 10MHz to 133MHz operating frequency
  • Distributes one clock input to two banks of four outputs
  • Separate output enable for each output bank
  • External feedback (FBK) pin is used to synchronize the outputs to the clock input
  • Output Skew <200 ps
  • Low jitter <200 ps cycle-to-cycle
  • 1x, 2x, 4x output options (see table): - 2308B-1 1x - 2308B-2 1x, 2x - 2308B-3 2x, 4x - 2308B-4 2x - 2308B-1H, -2H, and -5H for High Drive
  • No external RC network required
  • Operates at 3.3V VDD
  • Available in SOIC and TSSOP packages

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
2308B-1DCG Active DCG16 SOIC 16 C Yes Tube Availability
2308B-1DCG8 Active DCG16 SOIC 16 C Yes Reel Availability
2308B-1DCGI Active DCG16 SOIC 16 I Yes Tube Availability
2308B-1DCGI8 Active DCG16 SOIC 16 I Yes Reel Availability
2308B-1HDCG Last Time Buy DCG16 SOIC 16 C Yes Tube Availability
2308B-1HDCG8 Last Time Buy DCG16 SOIC 16 C Yes Reel Availability
2308B-1HDCGI Last Time Buy DCG16 SOIC 16 I Yes Tube Availability
2308B-1HDCGI8 Last Time Buy DCG16 SOIC 16 I Yes Reel Availability
2308B-1HPGGI Active PGG16 TSSOP 16 I Yes Tube Availability
2308B-1HPGGI8 Active PGG16 TSSOP 16 I Yes Reel Availability
2308B-2DCG Active DCG16 SOIC 16 C Yes Tube Availability
2308B-2DCG8 Active DCG16 SOIC 16 C Yes Reel Availability
2308B-2DCGI Active DCG16 SOIC 16 I Yes Tube Availability
2308B-2DCGI8 Active DCG16 SOIC 16 I Yes Reel Availability
2308B-1HPGG Active PGG16 TSSOP 16 C Yes Tube Availability
2308B-1HPGG8 Active PGG16 TSSOP 16 C Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
2308B Datasheet Datasheet PDF 550 KB Oct 30, 2013
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
System Applications and Design Guidelines with IDT’s Zero-Delay Buffers Application Note PDF 245 KB Sep 11, 2013
PCNs & PDNs
PDN# : CQ-17-04(R1) Product Discontinuance Notice Product Discontinuation Notice PDF 606 KB Nov 29, 2017
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB Aug 24, 2017
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 13, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 14, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
PDN# CQ-14-05 MARKET DECLINED PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 192 KB Sep 3, 2014
PDN# : CQ-14-02R2 Product Discontinuation Notice PDF 549 KB Aug 4, 2014
PCN# : TB1403-01 Changed in Carrier Tape, Plastic Reel and Quantity per Reel on TSSOP-14, TSSOP-16 Product Change Notice PDF 663 KB Apr 7, 2014
PDN# : CQ-14-02R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 545 KB Feb 10, 2014
PDN# : CQ-14-02 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 544 KB Jan 25, 2014
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 20, 2012
PCN# : A1208-06 Changed of Assembly Location and Crystal Product Change Notice PDF 1.06 MB Nov 17, 2012
PCN# : A1204-01R1 Revised Notification to Remove Selective Devices from TSSOP-16 Product Change Notice PDF 332 KB Oct 1, 2012
PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 1, 2005
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB Apr 28, 2005
PCN# : A-0605-05 AIT as Alternate Assembly Facility for SOIC/QSOP/SSOP/TSSOP/PDIP Product Change Notice PDF 298 KB May 24, 2006
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016

Software & Tools

Title Other Languages Type Format File Size Date
2308_8 IBIS Model - IBIS ZIP 14 KB May 31, 2010
2308_12 IBIS Model - IBIS ZIP 15 KB May 31, 2010

News & Additional Resources