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Programmable Fanout Buffer

The 5P1105 is a programmable fanout buffer intended for high performance consumer, networking, industrial, computing, and data-communications applications. Configurations may be stored in on-chip One-Time Programmable (OTP) memory or changed using I²C interface.
The outputs are generated from a single reference clock. The reference clock can come from one of the two redundant clock inputs. A glitchless manual switchover function allows one of the redundant clocks to be selected during normal operation. Two select pins allow up to 4 different configurations to be programmed and accessible using processor GPIOs or bootstrapping. The device is available in 24-pin VFQFPN 4mm x 4mm package, with an industrial operating temperature range of -40° to +85°C.


  • Up to four high performance universal differential output pairs:
    • Low RMS additive phase jitter: 0.2ps
  • Four banks of internal non-volatile in-system programmable or factory programmable OTP memory
  • I²C serial programming interface
  • One additional LVCMOS output clock
  • Four universal output pairs:
    • Each configurable as one differential output pair or two LVCMOS outputs
  • I/O Standards:
    • Single-ended I/Os: 1.8V to 3.3V LVCMOS
    • Differential I/Os - LVPECL, LVDS and HCSL
  • Input frequency ranges:
    • LVCMOS Reference Clock Input (XIN / REF) – 1MHz to 200MHz
    • LVDS, LVPECL, HCSL Differential Clock Input (CLKIN, CLKINB) – 1MHz to 350MHz
    • Crystal frequency range: 8MHz to 40MHz
  • Individually selectable output voltage (1.8V, 2.5V, 3.3V) for each output pair
  • Redundant clock inputs with manual switchover
  • Programmable crystal load capacitance
  • Individual output enable/disable
  • Power-down mode
  • 1.8V, 2.5V or 3.3V core VDDDVDDA

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Output Banks (#)Inputs (#)Input TypeInput Freq (MHz)Core Voltage (V)Output Voltage (V)Output Skew (ps)Additive Phase Jitter Typ RMS (ps)
5LVPECL, LVDS, HCSL, LVCMOS1.000000 - 350.00000052LVCMOS, LVPECL, LVDS, HCSL, Crystal1.000000 - 350.0000001.8, 2.5, 3.31.8, 2.5, 3.3350.2

Product Options

This device is customizable. Choose from the options below, or use the Custom Part Configuration Utility now.
Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
5P1105A000NLGIActiveNLG24P2VFQFPN24IYesTrayCheck Availability
5P1105A000NLGI8ActiveNLG24P2VFQFPN24IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
5P1105 Datasheet Datasheet PDF 403 KB Jul 14, 2015
User Guides & Manuals
Timing Commander Software for Programmable Buffers Manual - Software PDF 916 KB Apr 20, 2015
Programmable Clock Buffer 5P1105/5P1103 Evaluation Board Manual - Eval Board PDF 633 KB Apr 17, 2015
Timing Commander Installation Guide Guide PDF 497 KB Oct 7, 2013
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-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
show all (8)
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 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
PCN# : W1602-01 300mm wafer size from 200mm wafer size at Global Foundries Product Change Notice PDF 344 KB Feb 20, 2016
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
5P1103/5P1105 Programmable Universal Output Buffers Product Brief PDF 832 KB Apr 29, 2015
show all (4)
5P1105 Reference Schematic Schematic PDF 31 KB Apr 13, 2015

Software & Tools

Title Type Format File Size Datesort icon
5P1105 IBIS Model Model - IBIS ZIP 399 KB Apr 15, 2015
5P1105 Timing Commander Personality File Software TCP 2.38 MB Apr 20, 2015
Timing Commander Installer v1.7.3.3 Software ZIP 17.87 MB May 12, 2016

Related Videos

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