Overview

Description

The 8T39S08A is a high-performance clock fanout buffer. The input clock can be selected from two differential inputs or one crystal input. The internal oscillator circuit is automatically disabled if the crystal input is not selected. The crystal pin can be driven by a single-ended clock. The selected signal is distributed to eight differential outputs
which can be configured as LVPECL, LVDS and HCSL outputs. In addition, an LVCMOS output is provided. All outputs can be disabled into a high-impedance state. The device is designed for a signal fanout of high-frequency, low phase-noise clock and data signal. The outputs are at a defined level when inputs are open or tied to ground. It is designed to operate from a 3.3V or 2.5V core power supply, and either a 3.3V or 2.5V output operating supply.

Features

  • Two differential reference clock input pairs
  • Differential input pairs can accept the following input levels:
    LVPECL, LVDS, HCSL, HSTL and Single-ended
  • Crystal Oscillator Interface
  • Crystal input frequency range: 10MHz to 40MHz
  • Maximum Output Frequency
    LVPECL - 2GHz
    LVDS - 2GHz
    HCSL - 250MHz
    LVCMOS - 250MHz
  • Two banks, each has four differential output pairs that can be
    configured as LVPECL or LVDS or HCSL
  • One single-ended reference output with synchronous enable to
  • avoid clock glitch
  • Output skew: 80ps (maximum)
    (Bank A and Bank B at the same output level)
  • Part-to-part skew: 200ps (typical)
  • Additive RMS phase jitter@ 156.25MHz, (12kHz - 20MHz):
    34.7fs (typical), 3.3V/ 3.3V
  • Supply voltage modes:
    VDD/VDDO
    3.3V/3.3V
    3.3V/2.5V
    2.5V/2.5V
  • -40°C to 85°C ambient operating temperature
  • Lead-free (RoHS 6) packaging

Applications

Documentation

Title Type Date
PDF944 KB
Datasheet
PDF1.99 MB
Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Overview
PDF1.83 MB
Overview
PDF728 KB
Product Change Notice
PDF983 KB
Product Change Notice

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