840N022I中文资料FemtoClock NG Crystal-to-LVCMOS/LVTTL Clock Synthesizer数据手册Renesas规格书

描述 Description

The 840N022I is a LVCMOS/LVTTL clock synthesizer designed for Ethernet applications. The device generates a selectable 125MHz or 62.5MHz clock signal with excellent phase jitter performance. The device uses Renesas' fourth generation FemtoClock® NG technology for an optimum of high clock frequency, low phase noise performance and low power consumption. The device supports 2.5V or 3.3V voltage supply and is packaged in a small, lead-free (RoHS 6) 8-lead TSSOP package. The extended temperature range supports wireless infrastructure, telecommunication, and networking end equipment requirements.

特性 Features

Fourth generation FemtoClock NG technology
125MHz output clock synthesized from a 25MHz fundamental mode crystal
One LVCMOS/LVTTL clock output
Crystal interface designed for 25MHz, 12pF parallel resonant crystal
RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.148ps (maximum)
RMS phase jitter @ 125MHz, using a 25MHz crystal (12kHz - 20MHz): 0.479ps (maximum)
LVCMOS interface levels for the control inputs
Full 2.5V or 3.3V supply voltage
Available in lead-free (RoHS 6) package
-40°C to 85°C ambient operating temperature