SiTime SIT5156AI-FA-33VT-38.400000

The SiT5156 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.

The SiT5156 leverages SiTime's unique DualMEMS temperature sensing and TurboCompensation technology to deliver 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 SiT5156 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 SiT5156 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, which require custom production for each frequency.

Refer to the manufacturing guidelines for the correct reflow profile and PCB cleaning recommendations to ensure optimal performance.

• Frequency range 1 MHz to 60 MHz, 1 Hz step size
• Factory-programmable options, short lead time
• Optimal dynamic stability under airflow and thermal shock conditions
• ±0.5 ppm stability over full temperature range
• Typical frequency slope (ΔF/ΔT) of ±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, no external LDO required
• 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 or clipped sine wave 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