Overview

The 840272I is a PLL-based Frequency Translator intended for use in Synchronous Ethernet applications. This high performance device is optimized to generate 25MHz and 8kHz LVCMOS clock outputs. The 840272I accepts the following differential or single-ended input signals: 161.1328125MHz (10GbE Mode), 156.25MHz (1GbE Mode), or 125MHz (Recovered clock from 10/100/1000BaseT Ethernet PHY). The extended temperature range supports telecommunication and networking end equipment requirements.

840272I - Block Diagram
840272I - Pinout
840272I - Block Diagram
840272I - Pinout
  • Two single-ended outputs (LVCMOS or LVTTL levels), output impedance: 17Ω
  • Single-ended lock detect output (LVCMOS or LVTTL levels)
  • Two selectable differential clock inputs
  • Differential input pair (CLKx, nCLKx) accepts LVPECL, LVDS, LVHSTL, SSTL, HCSL input levels
  • Internal resistor bias on nCLK pin allows the user to drive CLK input with external single-ended (LVCMOS/ LVTTL) input levels
  • Selectable input frequencies: 161.1328MHz, 156.25MHz or 125MHz
  • Output frequency: 25MHz, 8kHz
  • Full 3.3V supply voltage
  • -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
    840272AGILF
    circleObsolete
    memory
    view_in_ar
    		TSSOP 16 I Yes Tube
    840272AGILFT
    circleObsolete
    memory
    view_in_ar
    		TSSOP 16 I Yes Reel
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