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The SiT3921 is a highly flexible, differential DCXO with LVPECL and LVDS outputs. This programmable device supports any frequency, 1 to 220 MHz, along with any combination of voltage (1.8 V, 2.5 V-3.3 V), pull range (±25 ppm to ±200 ppm) and package (3225, 5032, 7050). It enables frequency tuning via a unique one-wire interface, eliminating frequency drift that is caused by board noise and simplifying PLL and clock synchronization design. It comes in 3 industry-standard 6-pin packages (3.2x2.5 mm, 5.0x3.2 mm, 7.0x5.0 mm).

Frequency
1 to 220 MHz
Frequency Stability (ppm)
±10, ±25, ±50
Operating Temperature Range (°C)
-20 to +70, -40 to +85
Oscillator Type
DCXO-DE
Output type
LVPECL, LVDS
Package Type
3.2x2.5, 5.0x3.2, 7.0x5.0
Phase Jitter
0.5 ps
Pull Range (ppm)
±25, ±50, ±100, ±200, ±400, ±800, ±1600
Features
Digitally controlled, Field Programmable
Voltage Supply (V)
2.5, 3.3
Availability
Production
Applications
  • Networking and communication systems
  • Networked video systems and digitizers
  • Jitter cleaner
  • Networked audio systems
  • Instrumentation
  • Low-bandwidth analog phase locked loop (PLL)
  • FPGA data recovery

3921

Features & Benefits

  • Digitally controlled 1 ppb frequency pull resolution
  • Frequency from 1 MHz to 220 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:
  • Eliminating a need for external DAC
  • Customized specification for optimal system performance
  • Easy availability of any device specifications within the operating range

One-wire digital frequency tuning

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

Three industry-standard packages

  • Minor modification to existing design using VCXO to adopt the DCXO;

4 to 6 weeks lead time

  • Reduce inventory overhead
  • Mitigate shortage risks

 

Quality Documents

Additional Resources