SiTime SIT5146AI-FK-33N0A10.000000

The SiT5146 is a ruggedized MEMS Super-TCXO with frequency stability of ±0.5 to ±2.5 ppm and maximum acceleration sensitivity of 0.009 ppb/g or 0.1 ppb/g. This product is carefully designed with excellent dynamic performance, making it ideal for high-reliability telecom, wireless and networking, industrial, precision GNSS, and audio/video applications.

The SiT5146 leverages SiTime's unique DualMEMS temperature sensing and TurboCompensation technology to deliver superior 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 SiT5146 is offered in three device configurations, orderable via ordering code:

1. TCXO with 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 SiT5146 can be factory-programmed to achieve any combination of frequency, stability, voltage, and pull range. 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 proper reflow soldering profiles and PCB cleaning recommendations to ensure optimal performance.

• Frequency range: 1 MHz to 60 MHz, 1 Hz step size
• Factory-programmable options, short lead times
• Excellent dynamic stability under airflow and thermal shock conditions
• Acceleration sensitivity: 0.009 ppb/g or 0.1 ppb/g
• Stability of ±0.5 ppm over full temperature range
• Typical frequency slope (ΔF/ΔT): ±15 ppb/°C
• Operating temperature range: -40°C to +105°C
• Optional extended low-temperature range to -55°C
• No activity dip or micro-jump
• Resistant to shock, vibration, and board flex
• On-chip voltage regulator eliminates external LDO
• Digital frequency adjustment via I²C (DCTCXO)
• Output frequency and trim range digitally controllable
• Trim 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 sinewave output
• RoHS and REACH compliant
• Lead-free, halogen-free, antimony-free

• Precision GNSS systems
• Satellite communications (SATCOM)
• Transponders