840N021中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

General Description

The 840N021 is a LVCMOS/LVTTL clock synthesizer designed for

Ethernet applications. The device generates a 125MHz clock signal

from a 25MHz crystal with excellent phase jitter performance. The

device uses IDT’s 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. The device is a member of the

high-performance clock family from IDT.

Features

? Fourth generation FemtoClock? NG technology

? 125MHz output clock synthesized from a 25MHz fundamental

mode crystal

? One 2.5V or 3.3V LVCMOS/LVTTL clock output

? Crystal interface designed for a 12pF parallel resonant crystal

? RMS phase jitter @ 125MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.156ps (maximum)

? RMS phase jitter @ 100MHz, using a 20MHz crystal

(12kHz - 20MHz): 0.451ps (maximum)

? LVCMOS interface level for the output enable input

? Full 2.5V or 3.3V supply voltage

? Lead-free (RoHS 6) packaging

? -40°C to 85°C ambient operating temperature

? Use replacement part 840N202CKI-dddLF