SIT3808

The SiT3808 is the most flexible LVCMOS/LVTTL compatible voltage-controlled oscillator (VCXO) on the market. The device supports any combination of frequencies (up to 80 MHz), voltage (1.8 V; 2.5 V to 3.3 V), pull range (±25 ppm to ±1600 ppm) and package (2724, 3225, 5032, 7050). It provides superior pull range linearity and tuning slope consistency (Kv), 10 times better than quartz crystal VCXOs, thereby simplifying PLL and clock synchronization design. The SiT3808 is 100% compatible with legacy quartz devices in footprint and control voltage and therefore replaces crystal VCXO oscillators without any design changes.

Specifications

Features

xtensive programmability

• Frequency from 1 MHz to 80 MHz
  
• Supply voltage of 1.8 V; 2.5 V to 3.3 V
  
• Frequency stability from ±10 ppm to ±50 ppm
  
• Pull range from ±25 ppm to ±1600 ppm:
  
• Customized specification for optimal system performance
  
• Readily available products with any specification within the operating range
  

< 1% pull range linearity

• Simpler loop control in software controlled system PLL
  
• More consistent PLL bandwidth over operating range
  
• Faster calibration and lock time
  
• Reduction of modulation harmonics
  

Superior tuning slope consistency

• Tighter PLL bandwidth and simpler system design
  

Four industry-standard packages

• 100% drop-in replacement for quartz VCXO without any design changes