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MPC9443 - Block Diagram
MPC9443 - Pinout


2.5V,3.3V LVCMOS Clock Fanout Buffer

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

The MPC9443 is a full static design supporting clock frequencies up to 350 MHz. The signals are generated and retimed on-chip to ensure minimal skew between the four output banks. Two independent LVPECL compatible clock inputs are available. This feature supports redundant differential clock sources. In addition, the MPC9443 supports single-ended LVCMOS clock distribution systems. Each of the four output banks can be individually supplied by 2.5 V or 3.3 V, supporting mixed voltage applications. The FSELx pins choose between division of the input reference frequency by one or two. The frequency divider can be set individually for each output bank. The MPC9443 output banks are in high-impedance state by deasserting the OEN pins. Asserting OEN will the enable output banks. Please see Table 4. Output High-Impedance Control (OEN) for details. The outputs can be synchronously stopped (logic low state). The outputs provide LVCMOS compatible levels with the capability to drive terminated 50 ? transmission lines. For series terminated transmission lines, each of the MPC9443 outputs can drive one or two traces giving the devices an effective fanout of 1:32 at VCC = 3.3 V. The device is packaged in a 7x7 mm2 48-lead LQFP package.


  • Configurable 16 outputs LVCMOS clock distribution buffer
  • Compatible to single, dual and mixed 3.3 V / 2.5 V voltage supply
  • Output clock frequency up to 350 MHz
  • Designed for high-performance telecom, networking and computer applications
  • Supports applications requiring clock redundancy
  • Maximum output skew of 250 ps (125 ps within one bank)
  • Selectable output configurations per output bank
  • Individually per-bank high-impedance tristate
  • Output disable (stop in logic low state) control
  • 48-lead LQFP package
  • 48-lead Pb-free Package Available
  • Ambient operating temperature range of –40 to 85°C

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)Divider ValueOutput Skew (ps)Additive Phase Jitter Typ RMS (ps)
16LVCMOS0.000000 - 350.0000000.000000 - 700.000000, 0.000000 - 350.0000002, 3LVPECL, LVCMOS42.5, 3.32.5, 3.31, 2125, 225

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MPC9443AEObsoletePRG48TQFP48CYesTrayCheck Availability
MPC9443AER2ObsoletePRG48TQFP48CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
MPC9443 Datasheet Datasheet PDF 179 KB Mar 14, 2016
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
show all (12)
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
PDN# : N-12-22R2 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 363 KB Jun 14, 2013
show all (4)
PDN# : N-12-22R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 209 KB Feb 28, 2013
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 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
MPC9443 IBIS Model Model - IBIS ZIP 22 KB Oct 12, 2007