SIT3373AI-4B9-28NU312.500000

Oscillators Overview

The SIT3373AI-4B9-28NU312.500000 is a MEMS voltage-controlled oscillator (VCXO) operating at a nominal frequency of 312.5 MHz. It features HCSL output signaling and operates on a 2.8V supply. The device utilizes DualMEMS temperature sensing and TurboCompensation technology for dynamic performance. It provides ±35 ppm frequency stability over the -40°C to 85°C industrial temperature range. The component is housed in a 6-SMD, No Lead package.

Oscillators Feature Summary

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

Oscillators Applications

• Telecommunications systems requiring low-jitter clocking
• Networking equipment with noisy environment operation
• Industrial applications demanding high reliability

Oscillators Procurement Notes

Verify that the ordering suffix matches the required output type, stability, and temperature range specifications. Confirm the package style and pin configuration align with the target PCB footprint. Ensure the supply voltage requirements are compatible with the system design before procurement.

Oscillators Selection Notes

Select this component when a differential VCXO with HCSL outputs is required for frequencies around 312.5 MHz. Consider its superior dynamic performance against environmental stressors compared to quartz alternatives. Evaluate the need for factory-programmed parameters to optimize clock configurations without customization costs.

Oscillators Part Context

This part belongs to the SiT3373 family of ultra-low jitter differential MEMS VCXOs. The series supports frequencies from 220 MHz to 725 MHz and offers multiple output types including LVPECL, LVDS, and HCSL. The family is designed for telecom, networking, and industrial applications requiring various pullable frequencies.

Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with existing quartz oscillators based on electrical parameters and mechanical dimensions if substitution is necessary.

Oscillators FAQ

Does the SIT3373 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 does the SIT3373 use for temperature compensation?

It utilizes SiTime’s unique DualMEMS temperature sensing and TurboCompensation technology.