Active MEMS oscillator with standby — no quartz replacement hassle
The DSC1030BC1-001.8432T is a MEMS-based XO (Standard) oscillator from Microchip's PureSilicon™ series, delivering a fixed 1.8432 MHz CMOS output from a 3V supply rail. The MEMS resonator eliminates the quartz crystal's startup-time variability and shock sensitivity — useful if your board sees vibration or you need a consistent power-on clock within a few milliseconds. Frequency stability is ±50ppm over the 0°C~70°C commercial temperature range, which covers most indoor electronics, office equipment, and appliance PCBs. The 3mA max supply current is typical for a MEMS oscillator at this frequency; the real power story is the standby mode.
Standby mode cuts supply to 1µA — why that matters
The Standby (Power Down) function on pin 1 (typically) pulls the output to high-impedance and drops the supply current to 1µA max. For a battery-powered sensor node that spends most of its life asleep, this saves the 3mA continuous draw of a standard oscillator — the difference between a coin cell lasting weeks vs. months. The disable current is specified at 1µA maximum, not typical — so the worst-case sleep budget is known at design time. No external load-switch or MOSFET needed; the oscillator's own standby pin handles the power-down.
It is suitable for new designs and production builds.