SiTime SIT5357AC-FQ033JT-100.000000

The SiT5357 is a ±100 ppb accuracy MEMS Super-TCXO fully compliant with the Telcordia GR-1244-CORE Stratum 3 oscillator specification. Designed for exceptional dynamic performance, the SiT5357 is ideal for high-reliability telecom, wireless and networking, industrial, precision GNSS, and audio/video applications. Leveraging SiTime's proprietary DualMEMS temperature sensing and TurboCompensation technology, the SiT5357 delivers superior dynamic performance for timing stability in the presence of environmental stressors such as airflow, temperature perturbation, 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 available 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 with digitally controlled output frequency via I²C interface, offering frequency adjustment resolution down to 5 ppt (parts per trillion). The SiT5357 can be factory-programmed for any combination of frequency, stability, voltage, and pulling 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 part. Refer to the manufacturing guidelines for proper reflow profiles 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, short lead time
• Excellent dynamic stability under airflow and thermal shock conditions
• Stability of ±100 ppb over full temperature range
• Typical frequency slope (ΔF/ΔT) of ±1 ppb/°C
• Allan deviation (ADEV) of 1.5e-11 at 10-second averaging time
• Operating temperature range: -40°C to +105°C
• No activity dip or micro-jumps
• 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 adjustment via I²C (DCTCXO)
• Digital control of output frequency and tuning range
• Tuning range up to ±3200 ppm
• Frequency tuning 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

4G/5G radio, small cells, IEEE 1588 boundary and grandmaster clocks, synchronous Ethernet, optical transport (SONET/SDH, OTN, Stratum 3), DOCSIS 3.x Remote PHY, precision GNSS systems, test and measurement