840004数据手册集成电路（IC）的时钟发生器PLL频率合成器规格书PDF

描述 Description

The 840004 is a 4 output LVCMOS/LVTTL Synthesizer optimized to generate Ethernet reference clock frequencies and is a member of the family of high performance clock solutions from IDT. Using a 26.5625MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, and 53.125MHz. The 840004 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 840004 is packaged in a small 20-pin TSSOP package.

特性 Features

·Four LVCMOS/LVTTL outputs, 17Ω typical output impedance
·Selectable crystal oscillator interface or LVCMOS single-ended input
·Supports the following input frequencies: 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz and 53.125MHz
·VCO range: 560MHz - 700MHz
·RMS phase jitter @ 212.5MHz (637kHz - 10MHz):0.49ps typical, VDDO = 3.3VPhase noise:Offset               .   Noise Power100Hz ............... -88.8 dBc/Hz1kHz ................. -109.0 dBc/Hz10kHz ............... -116.1 dBc/Hz100kHz ............. -117.5 dBc/Hz
·Full 3.3V or mixed 3.3V core/2.5V output supply mode
·0°C to 70°C ambient operating temperature
·Available in lead-free (RoHS 6) package