840002-01中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

General Description

The 840002-01 is a two output LVCMOS/LVTTL Synthesizer

optimized to generate Ethernet reference clock frequencies. Using a

25MHz 18pF parallel resonant crystal, the following frequencies can

be generated based on the two frequency select pins (F_SEL[1:0]):

156.25MHz, 125MHz, and 62.5MHz. The 840002-01 uses IDT’s 3RD

generation low phase noise VCO technology and can achieve 1ps or

lower typical random rms phase jitter, easily meeting Ethernet jitter

requirements. The 840002-01 is packaged in a small 16-pin TSSOP

package.

Features

? Two LVCMOS/LVTTL outputs@ 3.3V,

17? typical output impedance

? Selectable crystal oscillator interface or LVCMOS/LVTTL

single-ended TEST_CLK

? Output frequency range: 56MHz to 175MHz

? VCO range: 560MHz to 700MHz

? Output skew: 12ps (maximum)

? RMS phase jitter at 156.25MHz, (1.875MHz to 20MHz):

0.47ps (typical)

Phase Noise:

Offset Noise Power

100Hz.................-97.4 dBc/Hz

1kHz...................-120.2 dBc/Hz

10kHz.................-127.6 dBc/Hz

100kHz...............-126.1 dBc/Hz

? Full 3.3V or mixed 3.3V core/2.5V output supply modes

? -30°C to 85°C ambient operating temperat