MU00003-32.768K

Overview

The MU00003-32.768K is a surface-mount tuning fork crystal manufactured by NDK (NIHON DEMPA KOGYO CO., LTD). It operates at a fundamental frequency of 32.768 kHz with a load capacitance of 12.5 pF and an equivalent series resistance of 90 kOhms. The component features a 2-SMD, no-lead package measuring 3.20mm x 1.50mm in size and 0.035 inches in maximum height. Designed for base mode operation, it offers a frequency tolerance of ±20ppm and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Compact 3.2x1.5mm SMD footprint suitable for space-constrained designs
• High stability tuning fork configuration for precise timing
• Wide operating temperature range for industrial environments

Applications

• Embedded systems requiring real-time clock functionality
• Industrial automation control units
• Consumer electronics with low-power timing needs

Procurement Notes

Verify the specific load capacitance requirement of 12.5pF against the target circuit design to ensure accurate oscillation. Confirm that the 90k Ohm ESR aligns with the oscillator circuit's drive level limitations. Ensure the PCB layout accommodates the 3.2x1.5mm package dimensions and verify compliance with RoHS standards if required by the final product specifications.

Selection Notes

Select this component when a compact form factor is prioritized alongside standard 32.768kHz timing requirements. The 12.5pF load capacitance necessitates specific circuit matching compared to more common 6pF or 12.5pF variants. Consider the ±20ppm tolerance sufficient for general-purpose clocks but potentially insufficient for high-precision synchronization applications requiring tighter tolerances.

Part Context

This part belongs to NDK's portfolio of miniature crystal devices, leveraging the company's expertise in artificial crystal cultivation. NDK produces these components across global facilities, including major manufacturing bases in China and Japan, ensuring consistent quality for automotive and consumer electronics markets.

Replacement Considerations

Direct substitutes include other 32.768kHz SMD crystals with identical 12.5pF load capacitance and similar physical dimensions. Verify ESR compatibility to prevent over-driving the oscillator circuit during cross-brand replacement.