SiTime SIT5347AI-FQ033JTB100.000000

The SiT5347 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 is fully compliant with the Telcordia GR1244-CORE Stratum 3 oscillator specification and is designed for optimal dynamic performance, making it ideal for high-reliability communications, precision GNSS, and other applications with stringent clock stability requirements.

The SiT5347 leverages SiTime's unique DualMEMS temperature sensing and TurboCompensation technology to deliver optimal dynamic performance for timing stability in the presence of environmental disturbances such as airflow, temperature transients, vibration, shock, and EMI. The device also integrates multiple on-chip voltage regulators to filter power supply noise, eliminating the need for a dedicated external LDO.

The SiT5347 is offered in three device configurations, orderable via ordering codes:

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

The SiT5347 can be factory-programmed to achieve any combination of frequency, stability, voltage, and tuning range. This programmability enables designers to optimize clock configurations while eliminating the long lead times and custom 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.

• Output frequency range: 60–189 MHz and 208–220 MHz, 1 Hz step size
• Factory programmable options with short lead times
• Optimal dynamic stability under airflow and thermal shock conditions
• Acceleration sensitivity: 0.009 ppb/g or 0.1 ppb/g
• Stability over full temperature range: ±100 ppb
• Typical frequency slope (ΔF/ΔT): ±1 ppb/°C
• Allan deviation at 10-second averaging time: 1.5e-11
• Operating temperature range: -40°C to +105°C
• No activity dips or micro-jumps
• Resistant to shock, vibration, and board flexure
• On-chip voltage regulator eliminates external LDO
• Supply voltage: 2.5 V, 2.8 V, 3.0 V, and 3.3 V
• LVCMOS output
• 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 output
• RoHS and REACH compliant
• Lead-free, halogen-free, antimony-free

• Ballistics, missiles, and ammunition
• Portable communication devices
• Ruggedized communication networks
• Precision GNSS systems
• Satellite communications
• Transponders
• Communication systems