Skip to main content
8344I - Block Diagram
8344I - Pinout

8344I

Low Skew,1-to-24 Differential-to-LVCMOS/LVTTL Fanout Buffer

Alternative Products
NOTICE - The following device(s) are recommended alternatives:

The 8344I is a low voltage, low skew fanout buffer and a member of the family of High Performance Clock Solutions from IDT. The 8344I has two selectable clock inputs. The CLK0, nCLK0 and CLK1, nCLK1 pairs can accept most standard differential input levels. The 8344I is designed to translate any differential signal levels to LVCMOS/LVTTL levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50Ω series or parallel terminated transmission lines. The effective fanout can be increased to 48 by utilizing the ability of the outputs to drive two series terminated lines. Redundant clock applications can make use of the dual clock input. The dual clock inputs also facilitate board level testing. 8344I is characterized at full 3.3V, full 2.5V and mixed 3.3V input and 2.5V output operating supply modes.

Guaranteed output and part-to-part skew characteristics make the 8344I ideal for those clock distribution applications demanding well defined performance and repeatability.

Features

  • Twenty-four LVCMOS/LVTTL outputs, 7Ω typical output impedance
  • Two selectable differential clock input pairs for redundant clock applications
  • CLKx, nCLKx pair can accept the following differential input levels: LVDS, LVPECL, LVHSTL, SSTLHCSL
  • Maximum output frequency: 100MHz
  • Translates any single-ended input signal to LVCMOS/LVTTL with resistor bias on nCLK input
  • Multiple output enable pins for disabling unused outputs in reduced fanout applications
  • Output skew: 275ps (maximum)
  • Part-to-part skew: 600ps (maximum)
  • Bank skew: 150ps (maximum)
  • Supply modes:
    Core/Output
    3.3V/3.3V
    3.3V/2.5V
    2.5V/2.5V
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Skew (ps)Additive Phase Jitter Typ RMS (ps)
24LVCMOS0.000000 - 100.0000000.000000 - 100.0000002HSTL, LVDS, LVPECL, SSTL, HCSL32.5, 3.3275

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8344BYILFLast Time BuyPRG48TQFP48IYesTrayCheck Availability
8344BYILFTLast Time BuyPRG48TQFP48IYesReelCheck Availability

Documents

Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
no-lock
8344I Datasheet Datasheet PDF 161 KB Dec 14, 2015
Apps Notes & White Papers
no-lock
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
no-lock
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
no-lock
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
show all (12)
no-lock
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
no-lock
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
no-lock
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
no-lock
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
no-lock
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
no-lock
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
no-lock
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
no-lock
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
no-lock
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCNs & PDNs
no-lock
PDN# : CQ-16-02 Quarter PDN for Declined Market Product Discontinuation Notice PDF 592 KB Aug 25, 2016
no-lock
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
no-lock
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
show all (7)
no-lock
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
no-lock
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
no-lock
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 21, 2013
no-lock
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 Product Change Notice PDF 472 KB Mar 31, 2013
Other
no-lock
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
no-lock
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
no-lock
8344I IBIS Model Model - IBIS ZIP 48 KB Nov 6, 2009