840004I-01中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

General Description

The 840004I-01 is a 4 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 2 frequency select pins

(F_SEL1:0): 156.25MHz, 125MHz, and 62.5MHz. The 840004I-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 840004I-01 is packaged

in a small 20-pin TSSOP package.

Features

? Four single-ended LVCMOS/LVTTL outputs

17? typical output impedance

? Selectable crystal oscillator interface or single-ended input,

Supports the following output frequencies: 156.25MHz,

125MHz and 62.5MHz

? VCO range: 560MHz - 700MHz

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

0.52ps (typical)

? Output supply modes:

Core/Output

3.3V/3.3V

3.3V/2.5V

2.5V/2.5V

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

? Available in lead-free (RoHS 6) package

? For functional replacement part use 8T49N241