MEMS resonator, 32.768 MHz, CMOS output
The ASEMPC-32.768MHZ-T3: A MEMS-based standard oscillator — the resonator is silicon, not a quartz crystal, which gives it better shock and vibration tolerance (no piezo-mechanical resonance to mechanical frequency shift). 32.768 MHz is the binary-divisible RTC frequency: 2^15 divides exactly to 1 Hz, which is why it clocks every real-time clock circuit from watches to industrial PLC timers. CMOS output swings rail-to-rail and drives a logic input directly — no external termination needed for a standard MCU or FPGA clock input.
Package, stability, and temperature grade
±50 ppm frequency stability over the full operating range is the standard commercial oscillator grade — adequate for RTC, UART baud-rate timing, and general-purpose MCU clocks; it is not the ±4.6 ppm of a TCXO or the ±0.05 ppm of an OCXO. Commercial temperature grade -20°C to +70°C makes this suited for indoor equipment and office-grade instruments — not for engine-compartment or outdoor-exposed enclosures without additional thermal protection.