SIT3372AC-2B2-33NE148.350000

Oscillators Overview

The SiTime SIT3372AC-2B2-33NE148.350000 is a differential MEMS Voltage Controlled Oscillator (VCXO) operating at a nominal frequency of 148.35 MHz. It utilizes SiTime’s Elite Platform technology, featuring DualMEMS temperature sensing and TurboCompensation for high dynamic performance against environmental stressors. The device supports LVDS output signaling and operates on a 3.3V supply voltage within the range of 2.97V to 3.63V. It offers a frequency stability of ±25 ppm and an absolute pull range of ±3170 ppm. The oscillator is housed in a compact 6-SMD, No Lead package measuring 7.00mm x 5.00mm with a maximum height of 0.90mm. It functions reliably across an extended industrial temperature range from -20°C to +70°C.

Oscillators Feature Summary

• Integrates DualMEMS temperature sensing and TurboCompensation technology to resist airflow, thermal gradients, shock, and vibration.
• Features multiple on-chip regulators that filter power supply noise, eliminating the need for dedicated external LDOs.
• Provides ultra-low jitter performance with exceptional phase noise characteristics suitable for demanding timing applications.
• Factory programmable for specific combinations of frequency, stability, voltage, output signaling, and pull range.

Oscillators Applications

• Telecommunications infrastructure requiring precise clock synchronization
• High-speed networking equipment utilizing 148.35 MHz reference signals
• Industrial control systems operating in noisy or vibrating environments
• Data acquisition systems requiring low-jitter differential clock sources

Oscillators Procurement Notes

Verify the complete part number including suffixes to ensure correct output format, voltage, and package dimensions. Confirm that the LVDS output type matches the receiver requirements of the target circuit design. Check the specific absolute pull range option programmed into the device, as this varies by configuration. Ensure the operating temperature range aligns with the environmental conditions of the final application. Validate RoHS compliance status if required by regulatory standards for the end product.

Oscillators Selection Notes

Select this component when a differential VCXO with high linearity and resistance to environmental hazards is required. The 148.35 MHz frequency is standard for SDH/SONET and Gigabit Ethernet applications. Choose this model over quartz alternatives to reduce lead times and eliminate custom manufacturing costs. Ensure the system design can accommodate the 3.3V supply requirement and the specific footprint dimensions. Consider the integrated noise filtering capabilities if board-level power integrity is a concern.

Oscillators Part Context

The SIT3372 belongs to SiTime’s Elite Platform family of MEMS oscillators, designed for high-performance timing solutions. This series replaces traditional quartz VCXOs by offering factory programmability and superior robustness. The AC suffix indicates specific stability and temperature grade options within the broader SIT3372 product line. These devices are engineered to maintain consistent performance under dynamic environmental conditions where quartz devices may fail.

Oscillators Replacement Considerations

Direct replacements must match the 148.35 MHz frequency, LVDS output, and 3.3V supply. Verify pin compatibility with the 6-SMD No Lead package. Check if alternative MEMS VCXOs support the required ±3170 ppm pull range. Ensure substitute components offer comparable jitter specifications and temperature stability. Confirm that any cross-reference maintains the same environmental rating and RoHS status.