Overview

Description

The 8T49N012 is a high performance Clock Generator with selectable LVPECL or Single-ended outputs. The 8T49N012 can generate selectable frequencies from a crystal or a single-ended reference clock. The frequency is selected from the Frequency Selection Table.
 
Excellent phase noise performance is maintained with Renesas’ Fourth Generation FemtoClock™ NG PLL technology.

Features

  • Fourth Generation FemtoClock NG PLL technology
  • Three differential output banks:
    Bank A: selectable between four pairs of LVPECL or four pairs
                  of complementary LVCMOS/LVTTL outputs
    Bank B: two pairs of LVPECL outputs
    Bank C: six pairs of LVPECL outputs
  • Selectable clock input or crystal input.
  • Supports 25MHz fundamental crystal or 25MHz, 50MHz,
    66.67MHz clock input
  • Selectable 156.25MHz, 125MHz, 100MHz clock for Bank B and
    Bank C outputs
  • Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz,
    50MHz, 25MHz, 62.5MHz or 78.125MHz for Bank A outputs
  • PLL lock indication (LVCMOS output)
  • RMS phase jitter at 156.25MHz (12kHz - 20MHz): 0.199ps (typical)
  • Power supply modes:
    Core / Output
    3.3V / 3.3V
    3.3V / 2.5V
    2.5V / 2.5V
  • -40°C to 85°C ambient operating temperature
  • 56-Lead VFQFN
  • Lead-free (RoHS 6) packaging

Comparison

Applications

Documentation

Design & Development

Models