Overview

The 83948I is a low skew, 1-to-12 Differential-to-LVCMOS/LVTTL Fanout Buffer and a member of the family of High Performance Clock Solutions from IDT. The 83948I has two selectable clock inputs. The CLK, nCLK pair can accept most standard differential input levels. The LVCMOS_CLK can accept LVCMOS or LVTTL input levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50Ω series or parallel terminated transmission lines. The effective fanout can be increased from 12 to 24 by utilizing the ability of the outputs to drive two series terminated lines. The 83948I is characterized at full 3.3V core/3.3V output. Guaranteed output and part-to-part skew characteristics make the 83948I ideal for those clock distribution applications demanding well defined performance and repeatability.

83948I - Block Diagram
83948I - Pinout
83948I - Block Diagram
83948I - Pinout
  • Twelve LVCMOS/LVTTL outputs
  • Selectable differential CLK/nCLK or LVCMOS/LVTTL clock input
  • CLK/nCLK pair can accept the following differential input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
  • LVCMOS_CLK supports the following input types: LVCMOS, LVTTL
  • Maximum output frequency: 250MHz
  • Output skew: 350ps (maximum)
  • Part-to-part skew: 1.5ns (maximum)
  • 3.3V core, 3.3V output
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    83948AYILF
    circleObsolete
    memory
    view_in_ar
    		TQFP 32 I Yes Tray
    83948AYILFT
    circleObsolete
    memory
    view_in_ar
    		TQFP 32 I Yes Reel
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