The DSC1001CE1-004.0000T is a 4 MHz MEMS-based oscillator (XO) with a CMOS output, rated for -20°C to 70°C operation — the standard commercial/automotive cabin temperature range. Supply voltage spans 1.8 V to 3.3 V, so the same BOM line serves a 1.8 V MCU core clock and a 3.3 V peripheral bus without a separate regulator or level translator. The 4 MHz frequency is a common MCU external clock input — no PLL multiplication needed if the core runs at that rate.
For a system that sleeps most of the time — an automotive body controller or a battery-backed RTC — the standby current is low enough to ignore in the sleep-state power budget.
Lifecycle status is Active. Package is a 4-SMD, no-lead footprint, 3.20 mm x 2.50 mm, 0.90 mm seated height — standard 3225 crystal-oscillator land pattern. The MEMS die and ASIC are inside a plastic overmold, so no vacuum-sealing or hermeticity concerns during reflow.