Standard Frequency VCXO


The SiT3807 is a highly flexible, high-performance voltage-controlled oscillator (VCXO) with LVCMOS/LVTTL compatible output.  The device supports a set of standard frequencies along with any combination of voltage (1.8 V; 2.5 V to 3.3 V), pull range (±25 ppm to ±200 ppm) and package (2520, 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 SiT3807 VCXO is 100% compatible with legacy quartz devices in footprint and control voltage and therefore replaces crystal VCXO oscillators without any design changes.

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Four industry standard footprints for drop-in replacement of quartz VCXOs without any board changes
"Specs" "Value"
Oscillator Type VCXO-SE
Frequency 31 frequencies
Frequency Stability (ppm) ±25, ±50
Phase Jitter (rms) 0.5 ps
Output Type LVCMOS
Operating Temperature Range (°C) -20 to +70, -40 to +85
Pull Range (ppm) ±25, ±50, ±80, ±100, ±150, ±200
FlexEdgeTM Rise/Fall Time Yes
Voltage Supply (V) 1.8, 2.5, 2.8, 3.3
Package Type (mm²) 2.5x2.0, 3.2x2.5, 5.0x3.2, 7.0x5.0
Features Low Jitter, Field Programmable
Availability Production

Extensive programmability

  • Supply voltage of 1.8 V; 2.5 V to 3.3 V
  • Frequency stability from ±25 ppm to ±50 ppm
  • Pull range from ±50 ppm to ±200 ppm:
  • Customized specification for optimal system performance
  • Readily available products with any specification within operating range

<1% pull range linearity

  • Simpler loop control in software controlled 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 of quartz VCXO without any design changes

Ultra-fast lead time (4 to 6 weeks)

  • Reduce inventory overhead
  • Mitigate shortage risks


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