MEMS oscillator at 44.736 MHz with CMOS output
The DSC1121DI5-044.7360 is a MEMS-based XO (Standard) that generates a 44.736 MHz clock using a silicon resonator instead of a quartz crystal — start-up is typically under 5 ms and the part is immune to vibration-induced frequency shifts that plague crystal oscillators in motor-drive or automotive environments. CMOS output at 44.736 MHz directly drives the clock input of most MCUs, FPGAs, and Ethernet PHYs without an external level translator — the 35 mA max supply current at full load is within the budget of a 3.3 V rail.
Supply range and frequency stability over temperature
Operating from 2.25 V to 3.6 V, this oscillator spans both 2.5 V and 3.3 V logic families without a separate regulator — the Enable/Disable pin (E/D) pulls the output to high-impedance and drops supply current to 22 mA max, useful for power-sequencing or sleep modes.
Package footprint and layout fit
Housed in a 6-SMD no-lead package measuring 2.50 mm × 2.00 mm with a seated height of 0.90 mm, this oscillator fits on a 0.8 mm pitch BGA fan-out region or a dense multi-layer board — the no-lead construction eliminates side-solder inspection and reduces tombstoning risk during reflow.