SIT3373AC-4B2-25NG281.000000

Oscillators Overview

The SiTime SIT3373AC-4B2-25NG281.000000 is a differential MEMS voltage-controlled oscillator (VCXO) operating at a nominal frequency of 281 MHz. It features an HCSL output format and operates within a supply voltage range of 2.25 V to 2.75 V, with a typical nominal voltage of 2.5 V. The device provides a frequency stability of ±25 ppm and supports an absolute pull range up to ±3145 ppm. It is housed in a 6-SMD, no-lead package measuring 3.2 mm x 2.5 mm x 0.85 mm. The component is rated for an operating temperature range of -20°C to +70°C.

Oscillators Feature Summary

• Integrates multiple on-chip regulators to filter power supply noise, eliminating the need for dedicated external LDOs.
• Utilizes DualMEMS temperature sensing and TurboCompensation technology for resistance to airflow, thermal gradients, shock, and vibration.
• Offers exceptional dynamic performance with low jitter characteristics and high pull range linearity.

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to ensure correct configuration. Confirm that the ordering part number matches the required frequency, output type, and temperature grade. Check for any specific manufacturing notes regarding reflow profiles or tape and reel dimensions prior to integration into production assemblies.

Oscillators Selection Notes

Select this component when a programmable differential VCXO with HCSL outputs is required for frequencies around 281 MHz. Consider its integrated regulation capabilities if board space for external filtering is limited. Ensure the application environment falls within the specified -20°C to +70°C operational range and requires the documented pull range capabilities.

Oscillators Part Context

This part belongs to the SiT3373 series of ultra-low jitter differential MEMS VCXOs from SiTime. The series covers frequencies from 220 MHz to 725 MHz and offers factory-programmable options for frequency, stability, voltage, and output signaling. It is designed to replace quartz devices by providing customization without long lead times.

Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's cross-reference tools or official substitution guides for compatible alternatives.

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 is the maximum absolute pull range supported by this VCXO?

The SiT3373 offers multiple APR options up to ±3145 ppm.