SIT3373AC-4B3-33NX644.531250

Oscillators Overview

The SIT3373AC-4B3-33NX644.531250 is a differential MEMS voltage-controlled oscillator (VCXO) operating at a nominal frequency of 644.53125 MHz. It features HCSL output signaling and operates on a 3.3V supply within a 6-SMD, no-lead package measuring 3.20mm x 2.50mm. The device supports an operating temperature range from -40°C to +85°C with a frequency stability of ±50 ppm. It utilizes DualMEMS temperature sensing and TurboCompensation technology for dynamic performance.

Oscillators Feature Summary

• Integrates multiple on-chip regulators to filter power supply noise, eliminating the need for dedicated external LDOs.
• Provides resistance to airflow, thermal gradients, shock, and vibration through unique DualMEMS temperature sensing.
• Factory programmable for specific combinations of frequency, stability, voltage, output signaling, and pull range.

Oscillators Applications

• Telecommunications systems requiring low-jitter clocking
• Networking infrastructure equipment
• Industrial applications operating in noisy environments

Oscillators Procurement Notes

Verify the exact part number against the manufacturer's official documentation to ensure correct frequency, output type, and stability specifications. Confirm that the HCSL output and 3.3V supply requirements align with the target circuit design. Check for any specific reflow profile or handling instructions provided in the manufacturing notes to ensure proper assembly and reliability during production.

Oscillators Selection Notes

Select this component when a high-frequency VCXO with HCSL outputs is required for low-jitter applications. It is suitable for designs needing immunity to environmental stressors like vibration and thermal gradients. The integrated power regulation simplifies board layout by removing the need for external LDOs. Ensure the application benefits from factory-programmable parameters to avoid custom quartz lead times.

Oscillators Part Context

This model belongs to the SiT3373 family of differential MEMS VCXOs designed for frequencies between 220 MHz and 725 MHz. The series is engineered for ultra-low jitter performance and dynamic resilience. Unlike traditional quartz oscillators, these devices offer extensive programmability for frequency and stability, allowing designers to optimize clock configurations without customization costs.

Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official cross-reference tools or datasheet equivalents for compatible alternatives if sourcing issues arise.

Oscillators FAQ

Does the SIT3373AC-4B3-33NX644.531250 require an external LDO?

No, the device integrates multiple on-chip regulators to filter power supply noise, eliminating the need for a dedicated external LDO.

What technology provides the SiT3373's resistance to environmental stress?

The device utilizes SiTime’s unique DualMEMS temperature sensing and TurboCompensation technology to provide resistance to airflow, thermal gradients, shock, and vibration.