NDK NX3215SA-32.768K-STD-MUA-9 Ultra-Miniature RTC Crystal (32.768kHz, 12.5pF, 3.2x1.5mm SMD)

Ensure precise, ultra-low-power timekeeping in your high-reliability electronic designs with the NX3215SA-32.768K-STD-MUA-9 real-time clock (RTC) quartz crystal from NDK (Nihon Dempa Kogyo). Operating at the universal $32.768\text{ kHz}$ frequency ($2^{15}\text{ Hz}$), this premium tuning-fork crystal provides the continuous clock signal required by microcontrollers, RTC modules, and system sleep timers to maintain precise calendar time while consuming negligible battery power.

Housed in a compact, hermetically sealed 3.2 x 1.5 x 0.8 mm 2-pin ceramic package, the NX3215SA series is recognized for its outstanding frequency stability, low equivalent series resistance (ESR), and high resistance to mechanical shock and thermal stress. Featuring a standard 12.5pF load capacitance ($C_L$), it guarantees reliable oscillator startup and long-term timing accuracy across modern wireless IoT nodes, smart metering systems, wearable health monitors, and low-power automotive controllers.

Key Features:

• Universal 32.768 kHz Frequency: Ideal clock source for real-time clocks (RTC), low-power sleep/wake timers, and power-saving sleep modes.

• High Reliability & Stability: NDK’s precision tuning-fork crystal design offers low ESR and superior resistance to environmental impacts.

• Standard 12.5pF Load Capacitance: Seamlessly interfaces with standard microcontroller oscillator circuits (STM32, ESP32, nRF52, Microchip PIC).

• Compact 3215 Ceramic Footprint: Low-profile 3.2 x 1.5 mm package delivers excellent mechanical durability and thermal performance.

Specifications:

• Part Number: NX3215SA-32.768K-STD-MUA-9

• Manufacturer: NDK (Nihon Dempa Kogyo)

• Component Type: RTC Quartz Crystal Resonator

• Nominal Frequency: 32.768 kHz

• Frequency Tolerance: $\pm20\text{ ppm}$

• Load Capacitance ($C_L$): 12.5 pF

• Package Dimensions: 3.2 x 1.5 x 0.8 mm (SMD 3215, 2-Pin)