SiTime SIT5157AE-FD-33VT-122.880000

The SiT5157 is a MEMS Super-TCXO with ±0.5 ppm to ±2.5 ppm accuracy, designed for optimal dynamic performance. It is ideal for high-reliability telecom, wireless and networking, industrial, precision GNSS, and audio/video applications.

Leveraging SiTime's unique DualMEMS temperature sensing and TurboCompensation technology, the SiT5157 delivers best-in-class 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 regulators to filter power supply noise, eliminating the need for dedicated external LDOs.

The SiT5157 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 supporting digitally controlled output frequency via I²C interface, with tuning resolution up to 5 ppt (parts per trillion).

The SiT5157 can be factory-programmed for any combination of frequency, stability, voltage, and tuning range. Programmability enables designers to optimize clock configurations while eliminating the long lead times and custom costs associated with quartz devices, where each frequency is custom-made.

For the correct reflow profile and PCB cleaning recommendations for optimal performance, please refer to the Manufacturing Guidelines.

• 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
• ±0.5 ppm stability over full temperature range
• Typical frequency slope (ΔF/ΔT): ±15 ppb/°C
• 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
• Digital frequency adjustment via I²C (DCTCXO)
• Digital control of output frequency and tuning range
• Tuning 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

Precision GNSS systems, microwave backhaul, network routers and switches, professional audio and video equipment, storage and servers, test and measurement