SiT5721 Datasheet | SiTime

Description The Si T5721 is the industry’s first digitally controlled OCXO (DCOCXO), enabling output frequency tuning via I2C interface with ±5 ppt (±0.005 ppb) resolution. The device delivers ±5 ppb over-temp stability, ±0.04 ppb/°C frequency slope (d F/d T) and Stratum 3E pliance in the smallest 9 mm x 7 mm package. Leveraging Si Time’s unique Dual MEMS® and Turbopensation® temperature sensing technology, the Si T5721 is engineered for the best dynamic performance, delivering the most stable timing in the presence of environmental stressors - airflow, temperature perturbation, vibration, shock, and electromagnetic interference (EMI). The Si T5721’s environmental robustness enables unmatched ease-of-use and reduces system manufacturing overhead: - Highly flexible location on the PCB - Minimal shielding for thermal isolation Si T5721 can be factory-programmed to any nominal output frequency between 1 MHz and 60 MHz. It is supported by the Si T6731 evaluation board. 9 mm x 7 mm Package Features - Any frequency between 1 MHz and 60 MHz, in 1 Hz steps - ±0.04 ppb/°C frequency slope typical (d F/d T) - ±5 ppb frequency stability over temperature - Up to 85°C operating temperature range - 1.4E-11 ADEV at 10 second averaging time - Digital frequency pulling via I2C  Up to ±10 ppm pull range  ±5 ppt pulling resolution - Exceptional dynamic stability under airflow and rapid temperature changes - Excellent holdover over a wide range of conditions - Integrated regulators for on-chip power-supply noise filtering and excellent PSRR - GR-1244 Stratum 3E pliant - Resistant to shock and vibration - 3.3 V supply voltage - LVCMOS or clipped sinewave output Applications - 4G/5G radio - Base Stations - Digital Switching - Time and Frequency Measurement - IEEE 1588 - Test and measurement Package Pinout VDD 10 NF 9 NF 8 DNC 7 CLK 6 1 NF 2 STATUS 3 SCL 4 SDA 5 GND Figure 1. Top and bottom view Figure 2. Pin Assignments (Bottom view) Rev 1.0 7 June 2022 .sitime. Si T5721 1 to 60 MHz...