SiTime SIT5357AI-FQG33IT-200.000000

The SiT5357 is a ±100 ppb accuracy MEMS Super-TCXO fully compliant with the Telcordia GR-1244-CORE Stratum 3 oscillator specification. Designed for optimal dynamic performance, it is an ideal solution for high-reliability telecom, wireless and networking, industrial, precision GNSS, and audio/video applications. Leveraging the unique DualMEMS® temperature sensing and TurboCompensation® technology, the SiT5357 delivers superior timing stability and dynamic performance in the presence of environmental stressors 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 a dedicated external LDO. The SiT5357 is offered in three device configurations, orderable via ordering code: 1) TCXO with non-pullable output frequency, 2) VCTCXO allowing voltage-controlled output frequency adjustment, and 3) DCTCXO supporting digital control of output frequency via I²C interface with up to 5 ppt resolution. The SiT5357 is factory-programmable for any combination of frequency, stability, voltage, and pull range. This programmability enables designers to optimize clock configurations while eliminating the long lead times and custom tooling costs associated with quartz devices that require custom production for each frequency.

• Output frequency 60-189 MHz and 208-220 MHz, 1 Hz step size
• Factory programmable options for reduced lead time
• Optimal dynamic stability under airflow and thermal shock
• Stability of ±100 ppb over full temperature range
• Typical frequency slope (ΔF/ΔT) of ±1 ppb/°C
• Allan deviation of 1.5e-11 at 10-second averaging time
• Operating temperature range -40°C to +105°C
• No activity dip or micro-jump
• Resistant to shock, vibration, and board flex
• 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 pulling via I²C
• Digital control of output frequency and pulling range
• Pulling range up to ±3200 ppm
• Frequency pulling resolution down to 5 ppt
• RoHS and REACH compliant
• Lead-free, halogen-free, antimony-free

• 4G/5G radio and small cell base stations
• IEEE1588 boundary clock and master clock
• Synchronous Ethernet
• Optical transport
• Test and measurement