SiTime Corporation I2C\/SPI Oscillators SIT3521AC-1CF331SB1.033000

The SiT3521 is a 1 to 340 MHz I2C/SPI programmable oscillator with ultra-low jitter, designed for applications requiring flexible frequency generation in noisy environments. It is housed in a 10-lead QFN package measuring 5.0 x 3.2 mm and supports LVPECL, LVDS, or HCSL output signaling. The device offers two programming modes: any-frequency programming from 1 MHz to 340 MHz in 1 Hz steps, and digital frequency pulling with up to ±3200 ppm range and resolution as low as 5 ppt. It features an integrated LDO for power supply noise rejection, operates from -40°C to 105°C, and is RoHS and REACH compliant. Operation is supported via I2C or SPI, with factory-programmable I2C addresses orhardware-configurable addresses via pins A0 and A1. The part is confirmed to operate at 2.8 V supply voltage with ±25 ppm frequency stability and I2C mode enabled.