DESCRIPTION

· The PI6LC4820 is an LC VCO-based low phase noise design for 10GbE applications.
· It uses a 25MHz crystal input to generate 156.25MHz outputs via PLL.
· Provides a buffered crystal oscillator output as a low noise reference.
· Programmable dividers enable outputs of 312.5, 156.25, and 125MHz for non-10GbE Ethernet applications.

FEATURES

· 3.3V supply voltage.
· Crystal input: 25MHz.
· Differential input: 25MHz, 156.25MHz.
· Output frequencies: 312.5, 156.25, 125MHz.
· 9 LVPECL or LVDS bank selectable outputs.
· Low 1ps max integrated phase noise (12kHz to 20MHz).
· Optional crystal or clock input selection.
· PLL Bypass mode for testing.
· Power supply noise rejection: -50 dBc typical @ 156.25MHz.
· Packaging: 48-lead 7×7mm TQFN (Pb-free & Green).

APPLICATIONS

· 10GbE Ethernet networks.
· High-speed clock generation for Ethernet applications.
· Low noise reference for other circuitry.