SIT3373AC-2B9-33NZ280.550000

Oscillators Overview

The SiTime SIT3373AC-2B9-33NZ280.550000 is a differential MEMS voltage-controlled oscillator (VCXO) operating at a nominal frequency of 280.55 MHz. It utilizes DualMEMS temperature sensing and TurboCompensation technology to deliver low-jitter performance with a typical jitter of 0.21 ps. The device features LVDS output signaling and operates on a 3.3V supply within a 6-SMD, No Lead package measuring 5.2 mm x 3.2 mm. It provides a frequency stability of ±35 ppm and supports an absolute pull range up to ±3145 ppm. Integrated on-chip regulators filter power supply noise, eliminating the need for external LDOs.

Oscillators Feature Summary

• DualMEMS temperature sensing and TurboCompensation technology provide resistance to airflow, thermal gradients, shock, and vibration.
• Integrated on-chip regulators filter power supply noise, removing the requirement for dedicated external low-dropout regulators.
• Factory programmability allows customization of frequency, stability, voltage, output signaling, and pull range to optimize clock configurations.

Oscillators Applications

• Telecommunications systems requiring precise clocking
• Networking equipment demanding low-jitter differential signals
• Industrial applications operating in noisy or dynamic environments

Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct configuration. Confirm that the LVDS output type, 3.3V supply voltage, and ±35 ppm stability match the system requirements. Check the reflow profile specifications for proper surface-mount assembly procedures. Ensure the 6-SMD No Lead package dimensions align with the PCB footprint design. Validate RoHS compliance status if required by project regulations.

Oscillators Selection Notes

Select this component when low-jitter differential clocking is critical for signal integrity. The integrated noise filtering simplifies power design by removing external LDO dependencies. Factory programmability reduces lead times compared to custom quartz solutions. Consider the ±35 ppm stability and pull range capabilities for environmental variations. Verify compatibility with LVDS receiver inputs in the target application circuit.

Oscillators Part Context

The SiT3373 series covers frequencies from 220 MHz to 725 MHz, offering ultra-low jitter performance. This specific model represents a factory-programmed variant optimized for telecom and networking use cases. It replaces traditional quartz VCXOs with silicon-based reliability and faster turnaround times. The series supports multiple output types including LVPECL, LVDS, and HCSL.

Oscillators Replacement Considerations

Direct substitutes include other SiT3373 variants with different frequency or stability ratings, such as SIT3373AC-2E2-33NZ280.550000. Cross-model replacement requires verification of output signaling and package compatibility. Generic MEMS oscillators may not match the specific jitter or pull range characteristics without redesign.