Enable/Disable cuts power in sleep-mode designs
The ECS-327MVATX-5-CN-TR: The 200 µA maximum supply current at 3.3 V is modest in absolute terms; in a coin-cell or supercap-backed RTC partition, the ability to gate it entirely during deep sleep matters more than the idle draw.
Stability, temperature grade, and footprint
Frequency stability is ±25 ppm at 25 °C reference — acceptable for RTC timekeeping where a ±2-minute-per-day drift equates to roughly ±23 ppm, but tight enough that calendar and timestamp accuracy stays within specification across the operating range.