8V19N478 Overview
The 8V19N478 is a fully integrated FemtoClock NG jitter attenuator and clock synthesizer designed as a high-performance clock solution for conditioning and frequency/phase management of 10/40/100/400 Gigabit-Ethernet line cards. The device is optimized to deliver excellent phase noise performance as required to drive physical layer devices, and provides the clean clock frequencies of 625MHz, 500MHz, 312.5MHz,...
8V19N478 Key Features
- High-performance clock RF-PLL
- Optimized for low phase noise: -157.7dBc/Hz (1MHz offset
- Integrated phase noise, RMS (12kHz-20MHz): 73fs
- Dual-PLL architecture
- 1st-PLL stage with external VCXO for clock jitter attenuation
- 2nd-PLL stage with internal FemtoClock NG PLL at
- Three clock banks with one integer frequency divider and
- One clock bank with one fractional divider and six
- One VCXO-PLL output bank with one selectable LVDS and
- Four output banks contain a phase delay circuit with steps of the VCO clock period (400ps)
