SIT3372AI-1B3-33NZ128.000000

Oscillators Overview

The SIT3372AI-1B3-33NZ128.000000 is a MEMS Voltage-Controlled Crystal Oscillator (VCXO) operating at a nominal frequency of 128 MHz. It utilizes LVPECL output signaling and functions with a supply voltage range of 2.7 V to 3.3 V, specifically optimized for 3.3 V operation. The device features a frequency stability of ±50 ppm and operates within an industrial temperature range of -40°C to +85°C. Packaged in a compact 7.00 mm x 5.00 mm surface-mount footprint, it integrates on-chip regulators to filter power supply noise.

Oscillators Feature Summary

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

Oscillators Applications

• Telecommunications systems requiring low-jitter clocking
• Networking equipment demanding precise timing synchronization
• Industrial applications operating in noisy environments

Oscillators Procurement Notes

Verify the exact absolute pull range (APR) specification required for your design, as this parameter varies significantly across the SIT3372 family and is defined by the specific ordering suffix. Confirm that the LVPECL output format aligns with your receiver input requirements. Ensure the 7x5 mm package dimensions fit within your PCB layout constraints. Cross-reference the stability rating against your system's jitter tolerance specifications before finalizing component selection.

Oscillators Selection Notes

Select this model when a 128 MHz differential clock signal is required with LVPECL compatibility. The 3.3 V supply option suits systems where higher voltage levels are standard. Consider the MEMS architecture if environmental robustness against vibration and shock is critical compared to traditional quartz solutions. Verify that the available pull range meets the frequency modulation needs of your application.

Oscillators Part Context

This component belongs to the SiTime Elite Platform SIT3372 series, designed for ultra-low jitter applications between 1 MHz and 220 MHz. It replaces custom quartz VCXOs by offering factory-programmable parameters, which reduces lead times and customization costs. The series leverages silicon MEMS technology to provide superior dynamic performance in challenging thermal and mechanical conditions.

Oscillators Replacement Considerations

Direct substitutes include other SIT3372 variants with matching 128 MHz frequency and LVPECL outputs, such as SIT3372AI-1E9-25NU128.000000 or SIT3372AC-1B2-30NG128.000000, provided their voltage and stability specifications align with the design requirements.