MEMS clock source — what it replaces and why
The DSC1121AI1-090.0000T is a 90 MHz XO (Standard) oscillator built around a MEMS resonator rather than a quartz crystal — the MEMS die is sealed at wafer level, so the part resists the 30,000 g shock and 70 g vibration that cracks quartz blanks in industrial or outdoor gear. CMOS output at 90 MHz directly drives FPGA clock inputs, Ethernet PHY reference clocks, or MCU PLLs without an external level translator.
Supply voltage and temperature — fit for the BOM
The 6-VDFN exposed-pad package measures 7.00 mm x 5.00 mm with a seated height of 0.90 mm.