STDMUS2-32.768K

Overview

The STDMUS2-32.768K is a 32.768 kHz tuning fork crystal manufactured by NDK (NIHON DEMPA KOGYO CO., LTD). It operates in the fundamental mode with a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 70 kOhms. The component features a frequency tolerance of ±20 ppm at 25°C and functions within a temperature range of -40°C to +85°C. Packaged in a compact 2-SMD, No Lead form factor measuring 3.20mm x 1.50mm, it supports surface mount assembly.

Feature Summary

• Standard 32.768 kHz frequency for real-time clock applications
• Low profile 2-SMD surface mount package
• Compliant with RoHS environmental standards

Applications

• Real-time clock circuits in consumer electronics
• Embedded systems requiring low-power timekeeping
• Industrial automation control units

Procurement Notes

Verify the complete part number including all suffixes when ordering, as variations exist for load capacitance and tolerance. Confirm that the specific revision matches the design requirements for ESR and temperature range. Ensure compatibility with the target MCU's oscillator circuit parameters before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring a standard 12.5 pF load capacitance and 70 kOhm ESR. It is suitable for space-constrained PCB layouts due to its small 3.2x1.5 mm footprint. Consider alternative load capacitances if the host microcontroller requires different matching values.

Part Context

This crystal belongs to NDK's general-purpose quartz crystal lineup, designed for reliable performance in embedded timing applications. NDK is a major manufacturer of quartz components based in Japan, known for mass-producing high-quality crystals with uniform specifications for global electronic markets.

Replacement Considerations

Direct substitutes may include other 32.768 kHz crystals with identical 12.5 pF load capacitance and similar physical dimensions. Verify electrical parameters such as ESR and frequency stability before substitution to ensure circuit compatibility.