General Description
The 843004 is a 4 output LVPECL synthesizer optimized to
generate Fibre Channel reference clock frequencies and is a
member of the HiPerClocksTM 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_SEL[1:0]): 212.5MHz, 187.5MHz,
159.375MHz, 156.25, 106.25MHz, and 53.125MHz. The 843004
uses IDT’s 3rd generation low phase noise VCO technology and
can achieve 1ps or lower typical rms phase jitter, easily meeting
Fibre Channel jitter requirements. The 843004 is packaged in a
small 24-pin TSSOP package.

Features
• Four 3.3Vdifferential LVPECL output pairs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended clock input
• Supports the following output frequencies: 212.5MHz,
187.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, 53.125MHz
• VCO range: 560MHz – 680MHz
• RMS phase jitter @ 212.5MHz, using a 26.5625MHz crystal
(637kHz – 10MHz): 0.72ps (typical)
Offset Noise Power
100Hz ................ -95.0 dBc/Hz
1kHz .................. -114.3 dBc/Hz
10kHz ................ -123.8 dBc/Hz
100kHz .............. -124.6 dBc/Hz
• Full 3.3V supply mode
• -30°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package