SiTime SIT5346AI-FNG33IQA40.000000

The SiT5346 is a ruggedized ±100 ppb accuracy MEMS Super-TCXO with a maximum acceleration sensitivity of 0.009 ppb/g or 0.1 ppb/g. It fully complies with the Telcordia GR-1244-CORE Stratum 3 oscillator specification and is designed for optimal dynamic performance, making it ideal for high-reliability communications, precision GNSS, and similar applications.

The SiT5346 leverages SiTime's proprietary DualMEMS temperature sensing and TurboCompensation technology to deliver optimal dynamic performance for timing stability in the presence of environmental disturbances such as airflow, temperature perturbations, vibration, shock, and EMI. The device also integrates multiple on-chip voltage regulators to filter power supply noise, eliminating the need for dedicated external LDOs.

The SiT5346 is offered in three device configurations, orderable via ordering code:

1. TCXO with a non-adjustable output frequency;
2. VCTCXO allowing voltage-controlled output frequency adjustment;
3. DCTCXO supporting digitally controlled output frequency via I²C interface, with frequency adjustment resolution down to 5 ppt (parts per trillion).

The SiT5346 can be factory-programmed for any combination of frequency, stability, voltage, and tuning range. This programmability enables designers to optimize clock configurations while eliminating the long lead times and customization costs associated with quartz devices, where each frequency requires a custom design.

Please refer to the Manufacturing Guidelines for the correct reflow profile and PCB cleaning recommendations to ensure optimal performance.

• Frequency range 1 MHz to 60 MHz, 1 Hz step size
• Factory-programmable options, short lead time
• Optimal dynamic stability under airflow and thermal shock conditions
• Acceleration sensitivity of 0.009 ppb/g or 0.1 ppb/g
• ±100 ppb stability over full temperature range
• Typical frequency slope (ΔF/ΔT) of ±1 ppb/°C
• ADEV of 1.5×10⁻¹¹ at 10-second averaging time
• Operating temperature range −40°C to +105°C
• No activity dips or micro-jumps
• Resistant to shock, vibration, and board flex
• On-chip voltage regulator eliminates external LDO
• Digital frequency adjustment via I²C (DCTCXO)
• Digital control of output frequency and adjustment range
• Adjustment range up to ±3200 ppm
• Frequency adjustment resolution down to 5 ppt
• Supply voltage 2.5 V, 2.8 V, 3.0 V, and 3.3 V
• LVCMOS or clipped sine wave output
• RoHS and REACH compliant
• Lead-free, halogen-free, antimony-free

• Ballistics, ammunition
• Ruggedized communication networks
• Precision GNSS systems
• Satellite communications (SATCOM)
• Transponders